Cryogenic Flow Meters for Sale

Cryogenic Flow Meters for Highly Accurate and Reliable Cryogenic Fluids Flow Measurement.

Cryogenic Flow Meters for Sale

Commonly used Cryogenic Flow Meters include cryogenic turbine flow meters, orifice flow meters, mass flow meters, target flow meters, etc. Representative cryogenic fluids include LNG (liquefied natural gas), LN2 (liquid nitrogen), LO2 (liquid oxygen), liquefied ethylene, liquid hydrogen, liquid chlorine, and these cryogenic gases. LPG (liquefied petroleum gas) is not included in the cryogenic Fluid.

Sino-Inst offers a variety of  Cryogenic Flow Meters for Cryogenic fluids flow measurement. If you have any questions, please contact our sales engineers.

A cryogenic flow meter refers to an industrial flow meter specifically used to measure extremely low-temperature media. A cryogenic flow meter can complete the flow measurement of the medium under extremely low-temperature conditions. And the measurement accuracy is good, and will not damage the flowmeter.

At present, the common industrial cryogenic medium is around -200℃. For example, liquid nitrogen, liquid oxygen.

Extended reading: Cryogenic Liquid Nitrogen Flowmeters

A cryogenic liquid is defined as a liquid with a boiling point below -130oF (-90℃).

The representative cryogenic fluids are LNG (liquefied natural gas), LN2 (liquid nitrogen), LO2 (liquid oxygen), liquefied ethylene, liquid hydrogen, liquid chlorine and these cryogenic gases. LPG (liquefied petroleum gas) is not included in the extremely low temperature fluid.

Learn more about: Handling Cryogenic Liquids

Featured Cryogenic Flow Meters

Cryogenic Turbine Flow Meter

The liquid nitrogen flow meter is a commonly used cryogenic flow meter. The low-temperature turbine flowmeter is a dedicated liquid nitrogen flowmeter. It can also be used to measure cryogenic liquids such as liquid oxygen.

Liquid nitrogen refers to liquid nitrogen. Liquid with extremely low temperature. In industrial production, liquid nitrogen can be used as a deep refrigerant. The low-temperature turbine flowmeter is used as a liquid nitrogen flowmeter, which can work at a low temperature of -196°C (-320.8 °F). Liquid Nitrogen Flow Meter’s Turbine sensor structure at ultra-low temperature (-196℃) is made of special customized material, and it is equipped with low-temperature resistant amplifier. Realize the instantaneous and cumulative flow monitoring of liquid nitrogen.

Know more about: Turbine type Flow Meter

Cryogenic Mass Flow Meter

Cryogenic Mass Flow Meter is developed for measuring cryogenic media such as liquefied natural gas. The flow meter consists of a mass flow sensor and a transmitter. Adopting high-efficiency heat insulation technology to effectively control the heat exchange between LNG and other low-temperature media when flowing through the sensor. Reduce the vaporization of LNG and other low-temperature media in the pipeline, thereby reducing the impact of vaporization on flow measurement.

The equipped transmitter uses a digital signal processor (DSP) to process the collected signals and has the ability to judge the real-time state of the medium and other intelligent self-diagnosis functions. Temperature measurement range: -200-350℃.

Extended reading: Liquid Mass Flow Meter

Orifice flowmeter for cryogenic fluid

At present, many flows measuring instruments for extremely low-temperature fluids are orifice flowmeters, and their reliability is also very high.

  1. The material is 316L;
  2. In order to prevent fluid leakage caused by cold shrinkage. It is recommended to use welding method to connect, the orifice plate and the pipe use the same material;
  3. The porous orifice plate has advantages in the flow measurement of very low temperature fluids such as liquefied natural gas. Because the gas that may be generated can flow smoothly downstream from the small holes on the upper part of the orifice plate, and no gas accumulates in front of the orifice plate.

Extended reading: Fluid flow meter types

Target flowmeter for cryogenic fluid

The target flow meter also called a drag force flowmeter. The target flow meter inserts a target (drag element) into the flow field. The target usually is a flat disc or a sphere with an extension rod. There will be a differential pressure. And then target flow meters measure the drag force on the inserted target and convert it to the flow rate. Sino-Inst manufactures target flow meters for liquid, gas, and steam measurement.

It can accurately measure the flow of gas and liquid under various working conditions of normal temperature, high temperature 500℃, and low temperature -200℃;

Read more about Nitrogen Gas Flowmeters-Liquid Nitrogen Flowmeters

How does a cryogenic flow meter work?

Different cryogenic flow meters have different working principles. Here we choose the commonly used target type flowmeter to introduce the working principle.

When the medium flows in the measuring tube, the pressure difference caused by its own kinetic energy passing through the blocking member (target). And has a force on the blocking member. The magnitude of the force is proportional to the square of the velocity of the medium.

The mathematical way is as follows:
F = CdAρ • V2 / 2

In the formula: F —— the force of the choke (kg)
Cd-object resistance coefficient
A ——Axial projection area of ​​the choke on the measuring tube (mm2)
ρ ——Density of medium under working conditions (kg / m3)
the v-average flow velocity of the medium in the measuring tube (m / s)
The force F received by the choke member (target) is transmitted to the capacitive force sensor via a rigidly connected transmission member (stem).

And the capacitive force sensor generates a voltage signal output:
V = KF
In the formula:
V——Voltage output by the capacitive force sensor (mV), K——Proportional constant, F——The acting force of the choke (target)
So, after the voltage signal is pre-amplified, AD converted. And processed by the computer. The corresponding instantaneous flow and the cumulative total can be obtained.

Extended reading: liquid nitrogen level measurement

Liquid Nitrogen-Liquid Oxygen-Liquid Co2 Flow Meter

Liquid nitrogen refers to liquid nitrogen.
Liquid nitrogen is an inert, colorless, odorless, non-corrosive, non-flammable, extremely low-temperature liquid.

Frostbite is caused by a large amount of endothermic contact during vaporization.

Nitrogen makes up the bulk of the atmosphere (78.03% by volume and 75.5% by weight).

At normal pressure, the boiling point of nitrogen is -196.56°C. 1 cubic meter of liquid nitrogen can expand to 696 cubic meters of pure gaseous nitrogen (21°C). Liquid nitrogen can be obtained at higher temperatures if pressurized.

In industry, liquid nitrogen is obtained by fractional distillation of air.
The air is first purified and then liquefied in a pressurized and cooled environment. Separation by the different boiling points of components in the air.

There is no problem when human skin directly contacts liquid nitrogen for an instant. More than 2 seconds will cause frostbite and irreversible.

Extended reading: V-Cone Flow Meter Working Principle

Liquid oxygen (commonly denoted by the abbreviation LOX or LO²) is the form of oxygen in its liquid state. It has important applications in aerospace, submarine and gas industries. Liquid oxygen is a light blue liquid with strong paramagnetic properties.

Liquid O2 has a wide range of industrial and medical uses. Liquid oxygen is produced industrially by fractional distillation of liquid air. The total expansion ratio of liquid oxygen is as high as 860:1. Because of this advantage it is widely used in industrial production and military in modern times.

Due to its low temperature properties, liquid oxygen can make the substances it comes into contact with very brittle.

Liquid oxygen is also a very strong oxidant: organic matter burns violently in liquid oxygen. Some substances may explode if immersed in liquid oxygen for extended periods of time, including asphalt.

Liquid carbon dioxide refers to the liquefaction of carbon dioxide gas into a liquid form under high pressure and low temperature.

Liquid carbon dioxide is a refrigerant. It can be used to preserve food, and it can also be used for artificial rainfall.

It is also an industrial raw material and can be used to make soda ash, urea and soft drinks.

For the above liquid nitrogen, liquid oxygen, liquid hydrogen and other extremely low temperature liquids, if you need to detect the flow. Then we recommend choosing a very low temperature turbine flowmeter or a gear flowmeter. These two flowmeters can perform excellent flow detection under extremely low temperature conditions.

The low-temperature turbine flowmeter is used as a liquid nitrogen flowmeter, which can work at a low temperature of -196°C (-320.8 °F). The Turbine sensor structure at ultra-low temperature (-196℃) is made of special customized material. Realize the instantaneous and cumulative flow monitoring of liquid nitrogen.

  1. Nominal diameter:
    Common type (0.5~300) mm;
    Anti-corrosion type (6~100) mm
    Insertion type (80~600)mm
  2. Medium temperature:
    Ordinary type (-20~80)℃
    High temperature type (-20~120)℃
    Ultra-low temperature type (-196~80)℃
  3. Ambient temperature: (-20~55)℃;
  4. Accuracy: ±0.2%, ±0.5%, ±1%;
  5. Detector signal transmission line system: three-wire voltage pulse (three-core shielded cable);
  6. Power supply: voltage: 12V±0.144V, current: ≤10mA;
  7. Output voltage amplitude: high level ≥ 8V, low level ≤ 0.8V;

Gear flow meters are also a good choice for small-caliber liquid nitrogen measurement.

Gear flow transmitter is a type of positive displacement flow transmitter. It is a high-precision transmitter for measuring volume flow.

  • High pressure resistance (1.0-45MPa)
  • High and low temperature resistance (-196℃-200℃)
  • Can measure various viscous media
  • High precision and repeatability
  • Pulse output/analog output optional
  • Wide range ratio (1:100)
  • Wide measuring range
  • Strong anti-corrosion and anti-fouling ability (acid and alkali)

Frequently
Asked
Questions

Turbine flow meters are velocity flow meters, also called impeller flow meters. Can be used to measure the instantaneous flow and cumulative flow of liquids and gases.

Turbine flowmeters are widely used in flow measurement: petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, coal gas and cryogenic fluids. Turbine flowmeter signals can be divided into pulse signals or current signals (4-20mA). It is suitable for use with secondary display, PLC, DCS and other computer control systems.

The purpose of the flowmeter is to measure the flow of fluid in a pipe or open channel.

Flow meters are the eyes of industrial production.

Flow meters play a big role. It not only monitors media flow in real time. Moreover, in this aspect of automation, many industrialized enterprises have greatly reduced a lot of manpower and material resources.

Some common types of flowmeters that mainly measure gases and liquids are:
Electromagnetic Flowmeter,
Vortex flowmeter,
Thermal mass flow meters,
orifice flowmeter,
Turbine flowmeter,
V cone flowmeter,
orifice flowmeter,
Porous balance flowmeter,
Metal rotameter, etc.

In my country, the absolute value of the maximum relative percentage error of the flowmeter is used as the standard for dividing the accuracy level.
The maximum relative percent error is a simplified relative error.
The calculation method is:
Relative percent error = (measured value of the measured parameter – standard value of the measured parameter) / (the upper limit of the scale – the lower limit of the scale) * 100%
In order to facilitate the transmission of the value, the country has uniformly stipulated the series of accuracy grades of the instrument.

Remove the “±” and “%” numbers from the relative percent error of the flowmeter. It can be incorporated into the national unified instrument accuracy grade series:

  1. The accuracy of the first-class standard flowmeter: 0.005, 0.02, 0.05;
  2. The flowmeter accuracy of the secondary standard: 0.1, 0.2, 0.35, 0.5;
  3. Accuracy of general industrial flowmeter: 1.0, 1.5, 2.5, 4.0.

In addition, according to different uses. The accuracy of the flowmeter can also be divided into different grades:

  1. The accuracy level of the flowmeter used in scientific experiments is above 0.05;
  2. Most of the instruments used for industrial testing are in grades 0.1 to 4.0. Among them, the standard meters used for calibration are mostly grade 0.1 or 0.2. Most of the instruments used on site are grade 0.5 to 4.0.
  3. The instruments used for industrial testing are mostly in the 0.1 to 4.0 level.

Coriolis mass flow meters should be the most accurate flow meters on the market today.
Of course, the user only needs to choose the precision that meets the needs.

CO2 flow meters are instruments that can measure the flow of gaseous or liquid carbon dioxide. CO2 is a common industrial gas, and effective measurement is very important.

Carbon dioxide (CO2) is a colorless, odorless gas at room temperature and pressure. We often recommend precession vortex flowmeters, v-cone flowmeters, vortex flowmeters, gas turbine flowmeters, etc. Under different working conditions, we will choose different flow meters for customers.

Read more about: Industrial CO2 flow meters

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Sino-Inst, Manufacturer for Cryogenic Flow Meters. A wide variety of Cryogenic Flow Meters options are available to you. 

Sino-Inst’s Cryogenic Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Low temperature Turbine Flowmeter-The Best Liquid Nitrogen Flow Meter

A liquid nitrogen flow meter is a commonly used cryogenic flow meter. The low-temperature turbine flowmeter is a dedicated liquid nitrogen flowmeter. It can also be used to measure cryogenic liquids such as liquid oxygen.

Liquid nitrogen refers to Liquid with extremely low temperatures. In industrial production, liquid nitrogen can be used as a deep refrigerant. The low-temperature turbine flowmeter is used as a liquid nitrogen flowmeter, which can work at a low temperature of -196°C (-320.8 °F). Liquid Nitrogen Flow Meter’s Turbine sensor structure at ultra-low temperature (-196℃) is made of special customized material. Realize the instantaneous and cumulative flow monitoring of liquid nitrogen.

Sino-Inst offers a variety of Turbine flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Features of Turbine type Liquid Nitrogen Flow Meter

  1. The sensor is a fully enclosed structure, so it is safe and reliable, and can be used for high-pressure pipeline measurement according to requirements;
  2. The sensor material can be customized according to requirements, such as 304, 316 and all tetrafluoroethylene materials, suitable for various media, such as acid, alkali and other strong corrosive liquids;
  3. The sensor is a hard alloy bearing thrust type, which not only ensures accuracy, but also improves wear resistance.
  4. The sensor has been specially modified by our company, the structure is simple, firm and easy to disassemble;
  5. Wide measuring range and low lower limit flow rate;
  6. Measurement accuracy 0.2, 0.5, 1.0 can be selected as required;
  7. Our company’s caliber breaks through the convention, from 0.5mm, 1mm, 2mm, etc. to super large diameter insert type can be customized;
  8. When the anticorrosive PTFE material is constructed, the PTFE materials are all imported from Japan, which is safe and reliable;
  9. Ultra-high pressure type sensor adopts high thickness sealed sensor, matching high pressure flange or installation accessories;
  10. At ultra-low temperature (-196℃), the sensor structure is made of special custom-made imported materials, supporting low temperature resistant amplifier;
  11. The comprehensive pressure loss is small, the repeatability is good, and the accuracy is high.
  12. It has high resistance to electromagnetic interference and vibration.
  13. Various displays, battery-powered on-site display, external power supply display, and various signal outputs are all configured;
  14. The supporting explosion-proof meter is suitable for the use of explosion-proof products;
  15. Various installation methods are available: thread, flange, quick installation, direct welding, etc.;
  16. It can be used with flow totalizer to complete remote display;
  17. It can be combined with control instruments and control systems to form automatic quantitative conveying and feeding equipment;

Know more about: Turbine type Flow Meter

Specifications of Turbine type Liquid Nitrogen Flow Meter

  1. Nominal diameter:
    Common type (0.5~300) mm;
    Anti-corrosion type (6~100) mm
    Insertion type (80~600)mm
  2. Medium temperature:
    Ordinary type (-20~80)℃
    High temperature type (-20~120)℃
    Ultra-low temperature type (-196~80)℃
  3. Ambient temperature: (-20~55)℃;
  4. Accuracy: ±0.2%, ±0.5%, ±1%;
  5. Detector signal transmission line system: three-wire voltage pulse (three-core shielded cable);
  6. Power supply: voltage: 12V±0.144V, current: ≤10mA;
  7. Output voltage amplitude: high level ≥ 8V, low level ≤ 0.8V;
  8. Transmission distance: The distance between the sensor and the indicator can reach 250 meters;
  9. On-site display power supply: 3V (powered by lithium battery, can be used continuously for 3 years);
  10. Display mode: on-site LCD display instantaneous flow and accumulated flow;
  11. On-site display power supply with signal output: 24V; 4-20mA two-wire current output, remote transmission distance of 500 meters.

Extended reading: Turbine Flow meter Vs Gear Flow meter

The flow range and pressure are shown in the figure, and the flow unit is m3/h (for anti-corrosion or plug-in type, please inquire)

Dn
(mm)
Flow Range Nominal pressure
PN
(Mpa)
Maximum pressure loss(Mpa
Basic error limit
±0.2%
Basic error limit
0.50%
Basic error limit
1.00%
Lower limit Upper limit Lower limit Upper limit Lower limit Upper limit
0.5 0.004 0.012 1.6 or 4 0.15
1 0.007 0.021
2* 0.01 0.13
3* 0.04 0.25 0.12
4* 0.04 0.25 4
6.3
16*
25*
35*(Note 1)
6 0.1 0.6 0.1 0.6 0.08
10 0.25 1.2 0.2 1.2
12 0.8 2.5 0.4 2.5 0.25 2.5
15 1.2 4 0.6 4 0.4 4
20 1.5 7 1.1 7 0.7 7
25 2 10 1.6 10 1 10 0.04
32 3.2 16 2.5 16 1.6 16
40 4 20 3 20 2.5 25 4 or 10
50 8 40 4 40 4 40
65 12 60 6 60 6 60 1.6 or 2.5
80 20 100 10 100 10 100
100 25 160 20 160 16 160
150 50 300 40 300 40 400
200 120 600 100 600 80 800 1.6 or 2.5 or 4
250* 200 1000 160 1000 120 1200
300* 250 1600 180 1800

Note 1: There is no 35MPa for diameter 32mm
Note 2: “*” is a special order.

The nominal diameter is 0.5mm, the flow range is 0.02~0.06 m³/h, the basic error: ±1% of reading, when ≤0.02 m³/h, the basic error: ±1%FS. The flow range with a nominal diameter of 1mm is 0.03~0.100 m³/h, the basic error: ±1% of reading, when ≤0.03 m³/h, the basic error: ±1%FS.

When the nominal diameter is 2mm and the flow range is 0.040~0.13m3/h, the basic error: ±1% of reading; when ≤0.040m3/h, the basic error: ±1%FS (full-scale value).

When the nominal diameter is 3mm and the flow range is 0.085~0.250m3/h, the basic error: ±1% of reading; ≤0.085m3/h basic error: ±1%FS (full-scale value).

The flow range shown in the table is a conventional value. If necessary, it can be appropriately extended according to user requirements. The minimum flow rate can be extended to about 0.3m/s, and some specifications can be lower. The accuracy in the extended area is based on the full-scale value. The relative error is expressed.

  • Measuring medium: liquid (avoid multiphase flow)
  • Medium viscosity range: ≤5mPɑ·S
  • Calibration: Calibration with water before leaving the factory

Extended reading: Cryogenic Flow Meters | Liquid Nitrogen-Liquid Oxygen

Application of Liquid Nitrogen Flow Meter

  • Quickly freeze and transport food, or make ice products;
  • Conduct research on low temperature physics;
  • In the electronics industry, dry nitrogen is used to purge silicon wafers to keep the silicon wafers dry and clean. In the large-scale integrated circuit production process, high-purity nitrogen can be used as the carrier gas, inert protective gas and packaging gas for chemical reaction gas.
  • Liquid nitrogen is used for metal over-fitting or static-fitting assembly to avoid high temperature oxidation and maintain the surface finish of the parts. Parts soaked in liquid nitrogen can prolong the wear life after processing. Liquid nitrogen cooling during metal cutting has the advantages of long life and high surface finish.
  • Nitrogen is mainly used as shielding gas and purge gas in metallurgical industry. In the process of steel rolling and metal heat treatment, due to the preservation of nitrogen, the high temperature oxidation of the metal is reduced and the surface is smooth and clean. Filling the non-ferrous metal smelting furnace with nitrogen can reduce oxygen content and temperature, reduce oxidation, and improve product purity. Purge the molten steel with nitrogen to reduce the hydrogen content in the steel and increase the strength of the product. When the blast furnace is started, 86% of nitrogen is blown in, which can reduce coke consumption and extend the service life.
  • Used for chemical testing, such as BET specific surface area test method.

If you need to measure not liquefied nitrogen and liquefied oxygen, but gas nitrogen and oxygen. You can refer to:

Industrial oxygen flow meters Nitrogen flow measurement

Turbine type Liquid Nitrogen Flow Meter installation guide

  1. Before installation and use, clean or keep the tested liquid free of impurities, fibers and particles.
  2. Before using the sensor, fill the sensor slowly with liquid. Then open the outlet valve (the valve should be installed at the back of the flowmeter). It is strictly forbidden for the sensor to be impacted by high-speed fluid when it is in a liquid-free state.
  3. Especially newly installed pipelines should be cleaned before installation. Install the sensor again.
  4. The sensor should be cleaned regularly if possible. During maintenance and cleaning, please be careful not to damage the parts in the measuring chamber, especially the impeller. When assembling, please pay attention to the position relationship between the guide and the impeller.
  5. When the sensor is not in use, clean the internal liquid. After drying, add protective sleeves on both ends of the sensor to prevent dirt from entering. Then store in a dry place. (This item is very important)
  6. The equipped filter should be cleaned regularly. Clean the internal liquid when not in use. Just like the sensor, add a dust cover and store it in a dry place.
  7. The transmission cable of the sensor can be laid overhead or buried (the iron pipe should be covered when buried.)
  8. It is also very important to choose the installation point. It is recommended to install it on a horizontal pipe and pay attention to the direction of the fluid.
  9. Ensure a certain straight pipeline before and after the installation point, away from pumps, frequency conversion or high-voltage equipment.
  10. Before the sensor is installed, connect the line with the display instrument or the oscilloscope, turn on the power, and blow the impeller by mouth or hand to make it rotate quickly to observe whether there is display. Install the sensor when there is a display. If there is no display, check the relevant parts and troubleshoot.

Read more about Liquid Flow Meters Guide

Nitrogen Gas Flowmeters-Liquid Nitrogen Flowmeters

Gear flow meter for low liquid nitrogen flow measurement

The Gear flow meter is a micro digital positive displacement flow meter. Can measure very small flow rates and quantify small volumes of liquid. High and low-temperature resistance (-196℃-200℃).

The Gear flow meter for Microflow is made of stainless steel and is used for precise continuous or intermittent measurement of the flow or instantaneous flow of liquid. It is especially suitable for the flow measurement of heavy oil, polyvinyl alcohol, grease, and other high-viscosity media. It can measure the viscosity of Fluid up to 10000Pa.s.

Extended reading: liquid nitrogen level measurement

Nitrogen Gas flow meter

Cryogenic turbine flow meters and Gear flow meters are both used to measure cryogenic liquid nitrogen flow meters.
However, if you want to measure nitrogen, what flow meter should you use?

There are four mainstream measuring instruments:

  1. Thermal gas mass flow meter. Directly measure the mass flow of common gases, including nitrogen.
  2. Coriolis mass flowmeter. Directly measure the mass flow of gas and liquid. It can be used to measure nitrogen, which is more expensive.
  3. The vortex flowmeter directly measures the volume flow of gas and liquid. It is necessary to add temperature and pressure measuring sensors and totalizers to calculate the mass flow.
  4. Orifice flowmeter. The orifice is used as a throttling element and is equipped with a differential pressure transmitter to calculate the volume flow. To convert into a mass flow, temperature, pressure sensors and totalizers must also be added.

Compared with the above, the thermal gas mass flowmeter is recommended, which is moderately priced, simple to install and maintain, and accurate.

Further reading: Nitrogen(N2) Flow Meter Types

Extended reading: 5 matters to pay attention to when choosing threaded Vortex Nitrogen Gas Flow Meter

Other Featured Cryogenic Flow Measurement Solutions

Extended reading:
What is the K-factor in a flow meter?
Cryogenic Flow Meters|Liquid Nitrogen-Liquid Oxygen-LNG fluids

FAQ

What is nitrogen flow?

The volume unit of the measurement gas is NM3, the standard square.
Strictly speaking, it should be a volume unit, not a flow unit. Sometimes it means m3/h to be practical.
The volume flow rate of gas is measured in m3/h. Because the gas volume is related to temperature, pressure, and humidity, in order to facilitate comparison, the volume flow rate usually refers to the standard state (temperature is 20℃, pressure is 0.11MPa, relative humidity is 65%). The flow rate at this time is Nm3/h is the unit, “N” means the standard state.
Sometimes abbreviated as irregular h-1 liquid flow unit is different in different countries and regions.
Mass units commonly used internationally: milligrams, grams, kilograms, metric tons, ounces, pounds, and shale;
Volume units: milliliters, liters, cubic millimeters, cubic centimeters, cubic meters, cubic inches, cubic feet, gallons (English), gallons (US), pints (English), dry pints (US), liquid pints (US), fluid ounce (US), fluid ounce (English), barrel, etc.
The nitrogen flow unit is Nm³/h, commonly known as cubic per hour. The preceding N indicates that when there is pressure, the general flowmeter is marked like this.
Hope it helps you!

How does a liquid flow meter work?

The liquid flow meter can be divided into the following categories according to the measurement principle:
Mechanics principles: instruments that fall into this category include differential pressure type and rotor type using Bernoulli’s theorem; impulse type and movable tube type using momentum theorem; direct mass type using Newton’s second law; using fluid momentum principle Target type; turbine type using the angular momentum theorem; vortex type and vortex type using the principle of fluid oscillation; pitot tube type using total static pressure difference, volume type, weir, trough type, etc.
Electrical principle: The instruments used for this kind of principle include electromagnetic, differential capacitive, inductive, strain resistance, etc.
Acoustic principle: There is an ultrasonic method for flow measurement using the acoustic principle. Acoustic (shock wave) etc. Thermal principle: There are calorimetric, direct calorimetry, indirect calorimetry, etc. that use the thermal principle to measure flow. Optical principle: laser type, photoelectric type, etc. are instruments of this type of principle. Principles of atomic physics: nuclear magnetic resonance, nuclear radiation, etc. are instruments that belong to this type of principle. Other principles: There are marking principles (tracing principles, nuclear magnetic resonance principles), related principles, etc.
More about: Liquid Flow Meters Guide

What is a totalizer in a flow meter?

Most of the flow meters have the function of cumulative flow calculation. The component that realizes this function is the totalizer of the flowmeter. If the flowmeter itself does not have a cumulative flow calculation function. Then, we can configure a separate flow totalizer for flow accumulation calculation.
Extended reading: Turbine Insertion Flow Meter for Large Diameter Pipeline

You nay like:

Sino-Inst, Manufacturer for Liquid Nitrogen Flow Meters. A wide variety of liquid nitrogen flowmeter options are available to you. 

Sino-Inst’s Liquid Nitrogen Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank

The oil level sensor is very important for monitoring the level of the oil tank/fuel tank. Ultrasonic Oil Level Sensor is mainly used for monitoring the level of truck oil tank. Oil level displays and transmit.

Ultrasonic oil level sensor uses the principle of ultrasonic detection to detect the fuel level of the fuel tank. The fuel volume data is transmitted to the background monitoring system to achieve real-time monitoring of vehicle fuel consumption. Ultrasonic oil level sensor is mainly used in the field of Internet of Vehicles to monitor the change of fuel level in the fuel tank in real-time to achieve fuel level detection. It can be used to prevent fuel stealing, optimize operating costs, optimize driver driving behavior, and assist statistical decision-making. At the same time, this product can also be used in chemical, water conservancy, storage tanks, and other fields that require level detection.

Sino-Inst offers a variety of  Ultrasonic level sensors for level measurement. If you have any questions, please contact our sales engineers.

Features of Ultrasonic Oil Level Sensor

  1. Non-contact measurement. No need to change the shape of the container. No need to polish the surface paint of the container. No need to punch.
  2. Easy to install and maintain. Just install the sensor probe below the outside of the fuel tank. No need to change the original fuel tank measurement system. No need to make holes and changes to the fuel tank. And can guarantee the normal operation of the original automobile fuel gauge.
  3. Prevent the fuel level sensor from being corroded and polluted by the fuel, and can maintain long-term measurement stability;
  4. Metal shell, internal circuit potting treatment, rainproof design, no pressure on outdoor environment.
  5. The external waterproof 3M glue is equipped with a special metal fixing bracket, which is simple to install and firmly fixed.
  6. Wide voltage operation, DC 12~48V power supply, suitable for various vehicles.
  7. RS232/RS485/0~5V voltage analog quantity/TTL-UART multiple output interfaces, compatible with various sensor signal acquisition equipment connections.
  8. High frequency ultrasonic detection, high solid penetration, suitable for containers made of various materials such as metal and plastic.
  9. Strong reliability. It can work normally in harsh environments, moisture-proof, acid-proof, flame-retardant, anti-interference, and intelligent.
  10. The product can be used alone, using the auxiliary display to directly view the data. It can also be used in conjunction with a GPS device to transmit data to the background through the GPS device. Perform data statistics, report analysis and query.

Specifications of Ultrasonic Oil Level Sensor

Parameter itemSpecification Description
Operating VoltageDC12~48V
Working current≤25mA
Measuring range5~150cm
Measurement resolution0.1mm
Explosion-proof gradeIntrinsically safe ExiaⅡCT6 Flameproof ExdⅡCT5
Protection levelIP67 dustproof and waterproof
Operating temperature-20℃~80℃
storage temperature-25℃~85℃
Device interfaceRS232/RS485/0~5V analog
Communication interface parametersCommunication rate 9600bit/s
The thickness of the measured container≤20mm

Remarks:

Ⅰ. Normal temperature and humidity. 1 standard atmosphere. The measured liquid is 0# diesel. For testing other liquids, please specify when ordering.

Ⅱ. The sensor can satisfy 2cm thickness container. 5 meters range requirement. Changes in the measurement range must be notified in advance. Default 5cm~1.

Ⅲ. The sensor RS232/RS485 default automatic output mode, compatible with MODBUS controlled and capacitive stick mode.

Extended reading: Guide to Ultrasonic Level Transmitters

Comparison of Ultrasonic Oil Level Sensor with other Oil Level Sensors

  1. Capacitive type: easy to be affected by oil pollution and cause errors. Can not produce electric sparks. Hole installation.
  2. Resistive type: mechanical measurement. Large error, hysteresis, long-term contact with the sensor. It is easy to be corroded and polluted, which affects the measurement accuracy. The fuel tank must be punched during installation.
  3. Flowmeter type: the oil pipe needs to be cut off, and the fuel filling amount cannot be measured. Only the used amount can be measured. It is not convenient for measurement management.
  4. Reed tube type: measurement output accuracy is low. It is greatly affected by the temperature of the measurement medium and the fluctuation of the power supply voltage. The components are easy to be magnetized. The measurement data is greatly affected by the fluctuation of the oil level and the oil pollution, and cannot be installed and manufactured according to the height of the fuel tank.
  5. Float type: can only be used for the fuzzy indication of the liquid level. It cannot be used for the measurement of the liquid level, the degree of fuel contamination of the film resistor, the power supply voltage, the mechanical structure, the lubricity and other product reasons, and the long-term stability of the output value Greater impact.
  6. Ultrasonic: Use non-contact ultrasonic technology to measure. High measurement accuracy, free from corrosion and pollution, explosion-proof, convenient installation, high stability and wide application.

Explore Oil and Gas Flow Meters

How does an oil level sensor work?

Ultrasonic externally attached oil level sensor uses the principle of ultrasonic echo ranging. The sensor is installed outside the bottom of the fuel tank and sends out an ultrasonic signal from the bottom, which is reflected by the oil surface, and then calculates the height of the liquid level according to time and speed.

At the same time, combined with digital signal processing technology, it overcomes the influence of the container wall and realizes high-precision non-contact measurement of the liquid level in the container, which can meet the requirements of industrial applications in terms of application.

Extended reading: Types of Fuel-Diesel Level Sensors

Ultrasonic Oil Level Sensor Application

The ultrasonic fuel level sensor can be used for various vehicles. Such as logistics vehicles, taxis, buses, passenger vehicles, etc.. It is used to digitally record vehicle fueling and fuel consumption. Prevent fuel theft. Avoid waste of resources. Improve operating efficiency, And improve traffic safety. Strengthen the level of operation and management.

  1. Prevent oil theft: The system can easily read the actual oil volume through the oil volume display screen or the background monitoring terminal. It can effectively control the behavior of stealing oil and falsely issuing fuel bills.
  2. Optimizing operating costs: Through the collection and analysis of statistical monitoring data, the oil volume and mileage at any time can be counted, and the oil volume per kilometer and the fuel cost per kilometer can be calculated. This allows the managers to analyze the economic and fast transportation routes.
  3. Optimize driver’s driving behavior: Real-time monitoring of fuel quantity data can effectively improve the driver’s driving habits and reduce normal fuel consumption.
  4. Strengthen operation management: effective oil quantity data analysis and statistics. Provide scientific decision-making basis for enterprises. Change unreasonable quota oil quantity management indicators based on experience and intuition. Through the statistical analysis of oil quantity, the unreasonable quota oil quantity index can be quickly reduced to a reasonable level. It can save the enterprise’s high oil quantity quota expenditure.

Extended reading: Oil Level Measurement Solutions for the Oil & Gas Industry

https://www.drurylandetheatre.com/wp-content/uploads/2020/11/Externally-attached-ultrasonic-oil-level-sensor.mp4

Extended reading: Diesel fuel tank level gauges & indicators

Ultrasonic Oil Level Sensor Installation Steps

Step 1. Choose the installation location

① When selecting the installation area at the bottom of the fuel tank, try to avoid the oil outlet pipes at both ends of the fuel tank and the barrier position near the oil inlet, and try to choose the ideal installation area at the middle position.

②Clean up the dirt at the installation location with a rag at the selected location. Please do not polish the paint layer at the bottom of the fuel tank before confirming the installation point, so as to avoid the wrong location and waste installation man-hours.

Step 2. Test and confirm the installation point

①Spread the prepared clean water on the sensing area of the probe, and add as much water as possible to ensure that the air on the contact surface between the sensor and the fuel tank is removed, and then the sensor is fixed to the fuel tank to select the installation position.

②Connect the waterproof head of the display board and the waterproof head of the oil level sensor, insert the USB plug of the display board into the pre-prepared mobile power supply, and observe whether the data on the display board is stable to determine whether the selected point is correct.

Step 3. Fix the ultrasonic oil level sensor

① Polish the selected installation point with sandpaper to remove the paint layer to ensure that the installation surface is flat, and clean it again with a rag to ensure that no dirt enters the sensor before installation.

②Use a glue gun to hit the glue into the sensor’s sensing area, and use a toothpick to mix the glue evenly, and then fit it to the fuel tank installation position. The glue will initially solidify in 4-5 minutes at room temperature, and then prepare the wiring.

Ultrasonic Tank Level Sensor-External Mounted

The ultrasonic tank level sensor is a completely non-contact/non-invasive measurement. The principle of ultrasonic (sonar) is used to measure liquid level. Fuel tank level monitoring, display, alarm, etc.

ultrasonic tank level sensor

Ultrasonic tank level sensor is also often referred to as “ultrasonic water level sensor”, “ultrasonic level detector” or “ultrasonic level transmitter”, etc.

Ultrasonic tank level sensor uses ultrasonic pulse echo to achieve liquid level measurement. Specifically, the transducer (probe) of the ultrasonic tank level sensor emits high-frequency ultrasonic pulses. When it encounters the surface of the liquid level to be measured, the sound waves are reflected Back. Part of the reflected echo is received by a transducer (probe) and converted into an electrical signal.

The user can almost truly know the time of the water level based on the reflected signal. The ultrasonic tank level sensor is one of the most common non-contact liquid level measurement instruments in the industry.

Ultrasonic tank level sensor can be widely used in various atmospheric storage tanks, process tanks, small tanks and small containers, pump lifting stations, waste water storage tanks, etc.;

Due to the flexibility of its design, ultrasonic level gauges can also be used in integrated systems or in place of float switches, conductivity switches and static pressure sensors. It can also be found in integrated applications in fluid control and chemical supply systems.

Extended reading: Capacitance level sensor advantages and disadvantages

Related Products

Frequently
Asked
Questions

Ultrasonic liquid level sensor is a digital liquid level meter controlled by microprocessor.

In the measurement, ultrasonic pulses are emitted by a sensor (transducer). The sound wave is reflected by the liquid surface and received by the same sensor. It is converted into an electrical signal by a piezoelectric crystal. Measure the distance to the surface of the liquid.

Due to the non-contact measurement, the measured medium is almost unlimited, and it can be widely used in the measurement of the height of various liquid materials.

In fact, there are many types of oil level sensors. Different types of oil level sensors work differently.

For example, the External PasteUltrasonic Oil Level Sensor mentioned in this article is based on ultrasonic measurement.

There is also a common capacitive oil level sensor. The sensing part of the capacitive oil level sensor is a coaxial container. When the oil enters the container, it causes a change in the capacitance between the sensor housing and the sensing electrode. This variation is converted through the circuit and performs accurate linear and temperature compensation, and outputs a 4-20mA standard signal for the display instrument.

For other types of oil level sensors, please refer to:

Oil Level Measurement Solutions for the Oil & Gas Industry

Of course. The oil level sensor is very important. Whether it is for automobiles or industrial tanks.

Accurate measurement and monitoring of oil level can effectively save production costs and ensure production efficiency.

Read More:

Magnetostrictive Level Gauge Application: Refined Oil Storage Tank

The working principle of the ultrasonic liquid level sensor is:

Ultrasonic transducer (probe) emits high-frequency pulse sound waves, and the surface of the measured level (material) is reflected back. The reflected echo is received by the transducer and converted into an electrical signal. The propagation time of the sound wave is proportional to the distance from the sound wave to the surface of the object.

The relationship between the sound wave transmission distance S and the sound speed C and the sound transmission time T can be expressed by the formula: S=C×T/2.

Image Source: https://www.coulton.com/beginners_guide_to_ultrasonic_level_transmitters.html

The probe part emits ultrasonic waves, which are then reflected by the liquid surface. The probe part is received again. The distance from the probe to the liquid (object) surface is proportional to the elapsed time of the ultrasonic wave:
hb = CT2
Distance [m] = time × speed of sound/2 [m]
The temperature compensation formula of sound velocity:
Ambient sound velocity = 331.5 + 0.6 × temperature

Read more about: How to Choose Explosion Proof Ultrasonic Level Sensor?

Currently, most ultrasonic level sensors on the market have an accuracy of ± 0.5% (standard conditions).

It can already meet the needs of most users.

Different types of oil tank level sensors work based on different measurement principles. Oil tank level sensors measure tank oil level either directly or indirectly.

For detailed classification and working principle of oil tank level sensors, please refer to:

Classification of Oil Level Measurement

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Sino-Inst offers over 10 Ultrasonic Tank Level Sensors for level measurement. About 50% of these are fuel level meters, 40% is the tank level sensor.

A wide variety of Ultrasonic Tank Level Sensor for level measurement options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Ultrasonic Tank Level measurement instrumentation, located in China.

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Liquid Flow Meters Guide

What is a liquid flow meter?

A liquid flow meter is a kind of meter that measures the flow of liquid fluid in pipes or open channels. Liquid flow meters can effectively monitor liquid flow rates for water, fuels, chemicals and more fluids.

If you need to purchase a Liquid Flow Meter, this article will be your best Purchasing Guide. Keep reading, Please!

Flow meters are classified into liquid flow meters and gas flow meters according to the medium. Then the common liquid flow meters mainly include: vortex flowmeter, turbine flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, differential pressure flowmeter, open channel flowmeter, Coriolis mass flowmeter, etc.

Sino-Inst offers a variety of  Liquid Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

Featured Liquid Flow Meters

Liquid Flow Meter Types

Turbine flow meter

Turbine flow meters are the main type of velocity flow meters. It uses a multi-blade rotor (turbine) to sense the average flow velocity of the fluid. A meter from which the flow or total volume is derived. Generally, it is composed of two parts: sensor and display instrument, and it can also be made into an integral type.

Application: Turbine flowmeter is widely used in measuring petroleum, organic liquid, inorganic liquid, liquefied gas, natural gas and cryogenic fluid.

Turbine flowmeter product features

  1. Strong resistance to impurities.
  2. Strong anti-electromagnetic interference and anti-vibration ability.
  3. Its structure and principle are simple and easy to maintain.
  4. Almost no pressure loss, saving power and electricity consumption.

Extended Reading: Liquid Turbine Flow Meter

Electromagnetic flow meter

Electromagnetic flowmeter is an instrument for measuring conductive liquid made according to Faraday’s law of electromagnetic induction.

Application:

The electromagnetic flowmeter has a series of excellent characteristics, which can solve the problems that other flowmeters are not easy to apply, such as the measurement of dirty flow and corrosion flow.

  • Electromagnetic flowmeters have a wide range of applications, and large-caliber meters are mostly used in water supply and drainage projects;
  • Small and medium calibers are often used in high-demand or difficult-to-measure occasions, such as the cooling water control of the blast furnace tuyere in the iron and steel industry, the measurement of pulp and black liquor in the paper industry, the strong corrosive liquid in the chemical industry, and the ore pulp in the non-ferrous metallurgical industry;
  • Small calibers and tiny calibers are often used in places with hygiene requirements such as the pharmaceutical industry, food industry, and biochemistry.

Electromagnetic flowmeter product features:

  1. Two-way measurement system.
  2. The straight pipe section required by the sensor is shorter, and the length is 5 times the pipe diameter.
  3. Low-pressure loss
  4. The measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity
  5. Mainly used in sewage treatment.

Vortex flow meter

The vortex flowmeter is a meter in which a non-streamlined vortex generator is placed in the fluid, and the fluid is alternately separated on both sides of the generator to release two series of regularly staggered vortices. When the flow cross-section is constant, the flow velocity is proportional to the volume flow. Therefore, the flow can be measured by measuring the oscillation frequency.

Application: The vortex flowmeter has developed rapidly and has become a general-purpose flowmeter.

Vortex Flowmeter Product Features

  1. The structure is simple, firm, no moving parts, high reliability, and reliable long-term operation.
  2. The installation is simple and the maintenance is very convenient.
  3. The detection sensor does not directly contact the measured medium, with stable performance and long life.
  4. The output is a pulse signal proportional to the flow rate, with no zero drift and high accuracy.
  5. The measurement range is wide, and the range ratio can reach 1:10.
  6. The pressure loss is small, the operating cost is low, and it is more energy-saving.

Extended reading: Threaded Vortex Nitrogen Gas Flow Meter

Mass flow meter

The principle of flow is directly related to the measurement; the indirect mass flowmeter is indirectly multiplied by the density meter and the volume flow to obtain the mass flow.

Application:
In the case of high temperature and high pressure in modern industrial production, the application of direct mass flowmeter encounters difficulties due to factors such as material and structure;
However, indirect mass flow meters are not suitable for practical applications due to their density being limited by the scope of application of humidity and pressure.

Mass flow meter product features:

  1. No mechanical transmission mechanism, small size, lightweight, easy to maintain
  2. High precision
  3. No moving parts inside, good stability
  4. Wide range ratio, much better than other traditional instruments

Read more about: Gas Thermal Mass Flow Meter

Ultrasonic flow meter

The ultrasonic flowmeter is designed based on the principle that the speed of ultrasonic propagation in the flowing medium is equal to the geometric sum of the average flow velocity of the measured medium and the speed of the sound wave itself. It also reflects the flow rate by measuring the flow rate. Ultrasonic flow meters can be divided into time difference type and Doppler type according to the measurement principle.

Application:

The propagation time method is applied to clean, single-phase liquids and gases. Typical applications include factory discharge liquid, strange liquid, liquefied natural gas, etc.;
Gas application has good experience in the field of high pressure natural gas;

The Doppler method is suitable for two-phase fluids with low heterogeneous content. Such as untreated sewage, factory effluent, and dirty process fluids, it is usually not suitable for very clean liquids.

Guess You’ll Like: Ultrasonic flow meters types & technical guide

Target flow meter

The target flow meter also called a drag force flowmeter. The target flow meter inserts a target (drag element) into the flow field. The target usually is a flat disc or a sphere with an extension rod. There will be a differential pressure. And then target flow meters measure the drag force on the inserted target and convert it to the flow rate. Sino-Inst manufactures target flow meters for liquid, gas, and steam measurement.

Features

  1. The whole instrument has a solid structure and no moving parts, plug-in structure, easy to disassemble
  2. The dry calibration method can be used on the spot, that is, the weight hanging method is used.
  3. With integrated temperature and pressure compensation, directly output quality or standard
  4. The measuring range can be changed by replacing the baffle (target) according to actual needs
  5. Strong vibration resistance, pulsating flow can be measured within a certain range.

Differential pressure flow meter liquid flow metering

The differential pressure flowmeter is a meter that calculates the flow rate based on the differential pressure generated by the flow detection element installed in the pipeline, the known fluid conditions and the combined size of the detection element and the pipeline.

Application: Differential pressure flowmeter has a wide range of applications, and various objects have applications in the flow measurement of closed pipelines.
Such as fluid: single-phase, miscible, clean, dirty, viscous flow, etc.;
Work: normal pressure, high pressure, vacuum, normal temperature, high temperature, low temperature, etc.;
Pipe diameter: from a few millimeters to a few meters; flow: subsonic speed, sound speed, pulsating flow, etc.
Its consumption in various industrial sectors accounts for about 1/4 to 1/3 of all flow meters.

The most commonly used liquid differential pressure flowmeter is the orifice flowmeter.

Product features of orifice flowmeter:

  1. The structure of the throttling device is easy to replicate, simple, firm, stable and reliable in performance, long in service life and low in price.
  2. Wide application range, all single-phase flow can be measured, and part of mixed-phase flow can also be applied.
  3. The standard throttling device can be put into use without real flow calibration.
  4. The integrated orifice plate is simpler to install, no pressure pipe is needed, and it can be directly connected to a differential pressure transmitter and a pressure transmitter.

Oval gear flowmeter

Features

  1. It relies on the pressure head of the measured medium to push the oval gear to rotate for measurement.
  2. The greater the viscosity of the medium, the smaller the leakage from the gear and the metering gap. Therefore, the larger the sticky skin of the nuclear test medium, the smaller the leakage error, and the more beneficial it is for measurement.
  3. It is suitable for the measurement of the flow of high-viscosity media, but not for fluids containing solid particles (solid particles will jam the gear so that the flow cannot be measured). If the measured liquid medium contains gas, it will also cause measurement errors.

Positive displacement flow meter

Positive displacement flow meter, also called fixed displacement flow meter, PD flow meter for short. It is the most accurate type among flow meters. It uses mechanical measuring elements to continuously divide the fluid into individual known volume parts. The total volume of fluid is measured according to the number of times that the measuring chamber is filled and discharged with this volume of fluid one after another.

Application: Positive displacement flow meters, differential pressure flow meters, and float flow meters are listed as the three most used flow meters. They are often used for total measurement of expensive media (oil, natural gas, etc.).

Float flow meter

Float flowmeter, also known as rotameter, is a kind of variable area flowmeter. In a vertical cone tube that expands from bottom to top, the gravity of the float of circular cross section is borne by the hydrodynamic force, so that the float can be Rise and fall freely in the cone.

Application: Float flowmeter is the most widely used type of flowmeter after differential pressure flowmeter, especially in small and micro flow.

Features of Rotameter:

  1. The most commonly used flow meter in industry and laboratories.
  2. The structure is simple, intuitive, low-pressure loss and convenient for maintenance.
  3. It must be installed on a vertical pipe section, and the fluid medium passes through the rotameter from bottom to top.

Extended reading: Liquid mass flow controller

You may like: Digital Flow Meters Guide| Liquid and Gas

Liquid Flow Meters Selection Guide

If from the upper part of this article, you do not know how to choose a suitable liquid flow meter. Then, you can follow our selection suggestions below.

Step 1: Confirm your liquid condition.

Before choosing a flow meter, you should sort out the details of your measured liquid.
such as:

  • Liquid name
  • Liquid temperature
  • Pipeline pressure
  • Liquid viscosity
  • Corrosive
  • Flow rate range
  • Pipe diameter

If you need to measure liquids under special circumstances, you can skip to the following:
Low temperature: Gear flow meter: High and low-temperature resistance (-196℃-200℃).
High viscosity: Oval Gear High Viscosity Flow Meter
Fuel: Industrial Fuel Flow Meters

Step 2: Identify your measurement needs.

The flow meter is designed to meet your measurement needs. Therefore, according to your needs, determine the function of the flowmeter. such as:

  • Measure volume flow or mass flow?
  • Is it necessary to display the instantaneous flow and cumulative flow locally?
  • What kind of signal output is needed? 4-20mA? Pulse?
  • What kind of installation form and size are planned? Such as ANSI150 flange? Outside clip?

Most liquid flow meters measure volumetric flow. If what you need is mass flow, you can jump to: Mass Flow Meters

If you are unwilling to change the pipeline, you can only choose to install the ultrasonic flowmeter with an external clamp.

Step 3: select the appropriate flow meter type.

Up to now, there may be many types of flow meters suitable for your measurement situation. Then you need to filter the flowmeter according to your pipe diameter and flow range.

For example, you need to measure the flow of milk. 2-inch pipe. Then you can refer to the flow range to select the appropriate flow meter.
2 inches, electromagnetic flowmeter, 2.21~35.35m³/h;
2 inches, turbine flowmeter, 4~40m3/h.

For example, what you need to measure is the water flow of a DN1000 pipeline. Then it is recommended that you choose the insertion electromagnetic flowmeter.

Step 4: Except for dedicated flow meters.

Under normal circumstances, when measuring some specific media, we will recommend a specific type of flowmeter.
such as:
Measure sewage, use an electromagnetic flowmeter.
To measure diesel oil, use a turbine flowmeter.

Step 5: Contact the manufacturer

The above liquid flow meter selection steps and selection suggestions are based on certain experiences.
If you are a newcomer, you are not sure about the above process. You can directly contact Sino-Inst sales engineers. We will provide you with the best advice.

Step 6: Combine the budget

According to your budget, choose the right liquid flow meter.
For example, you need to measure the water flow. Normally, you can choose an electromagnetic flowmeter or ultrasonic flowmeter. Then you can choose according to your budget.

Such as 2inch pipeline, DN50 electromagnetic flowmeter, USD 484.50/pc
With external clamp ultrasonic flowmeter, USD 423.00/pc

For example, 4inch pipe, DN50 electromagnetic flowmeter, USD 784.50/pc
With external clamp ultrasonic flowmeter, USD 423.00/pc

Of course, the above is our experience. It’s not absolute.

You may need the following traffic conversion tools to help you.

Extended reading: U-series Liquid Mass Flow Meter | Liquid-slurry flow measure

Liquid Flow Tools

Converters for conversion and calculation of flow. Or a calculation tool that requires flow measurement to obtain other measurement parameters. Help users choose the right flow sensor and transmitter!

DP Flow Meter Output CalculatorFlow Meter 4-20mA Current Output CalculatorFlow Velocity & Pipe Diameter to Volumetric Flow Rate Calculator
Mass Flow & Density to Volume Flow CalculatorMass Flow Rate Unit ConverterVolume Flow Rate Converter
Volume Flow & Density to Mass Flow CalculatorVolumetric Flow Rate & Pipe Diameter to Flow Speed Calculator

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FAQ

How does a liquid flow meter work?

Liquid flow meter can be divided into the following categories according to the measurement principle:
Mechanics principles: instruments that fall into this category include differential pressure type and rotor type using Bernoulli’s theorem; impulse type and movable tube type using momentum theorem; direct mass type using Newton’s second law; using fluid momentum principle Target type; turbine type using the angular momentum theorem; vortex type and vortex type using the principle of fluid oscillation; pitot tube type using total static pressure difference, volume type, weir, trough type, etc.
Electrical principle: The instruments used for this kind of principle include electromagnetic, differential capacitive, inductive, strain resistance, etc.
Acoustic principle: There is an ultrasonic method for flow measurement using the acoustic principle. Acoustic (shock wave) etc. Thermal principle: There are calorimetric, direct calorimetry, indirect calorimetry, etc. that use the thermal principle to measure flow. Optical principle: laser type, photoelectric type, etc. are instruments of this type of principle. Principles of atomic physics: nuclear magnetic resonance, nuclear radiation, etc. are instruments that belong to this type of principle. Other principles: There are marking principles (tracing principles, nuclear magnetic resonance principles), related principles, etc.

What is a flow meter used for?

A meter that indicates the measured flow rate and/or the total amount of fluid in a selected time interval. Simply put, it is an instrument used to measure fluid flow in pipes or open channels.

Where should a flow meter be placed?

Most in-line flow meters are inline flow meters. They are all connected with the pipeline under test. Connect by flange, thread, etc.
The Insertion flowmeter is installed on the pipe under test by plug-in type. Suitable for larger pipe diameters.
Clamp-on flowmeter. The sensor is clamped outside the pipe for flow measurement.

Sino-Inst offers over 30 Liquid Flow Meters products. About 50% of these are differential pressure flow meters. 40% are water meters (like the Insertion Turbine Flow Meter), and 40% are water treatment (like the Annubar flow meter ).

A wide variety of Liquid Flow Meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Liquid Flow Meters, located in China.

The top supplying country is China (Mainland), which supply 100% of the Liquid Flow Meters respectively.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Liquid Flow Meters products are most popular in Domestic Market, Southeast Asia, and Mid East.

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

Industrial Tank level indicators and Tank Level Gauges

Tank level indicators are level gauges that can measure and display the level of industrial liquid storage tanks. Liquid level refers to the level of liquid in a sealed container (for example oil/fuel tank) or an open container (water tank).

In industrial production, it is often necessary to know the liquid level in the storage tank. The liquid level sensor converts the liquid level signal in the container into a switch signal or a voltage and current signal. Then through the external circuit, the measurer can intuitively know the liquid level in the container. There are many types of Liquid level indicators. By reading this article, you will know what kind of level indicators is best for your tank.

Sino-Inst offers a variety of Tank level indicators for level measurement. If you have any questions, please contact our sales engineers.

Featured Tank Level Indicators and Gauges

Hydrostatic Tank Level Indicators

Hydrostatic level measurement is based on the principle that the Hydrostatic is proportional to the height of the liquid. Hydrostatic submersible pressure level transmitter is the most commonly used level measurement sensor. Of course, the differential pressure transmitter can also measure the liquid level.

A hydrostatic level sensor is a submersible pressure transmitter that has a pressure diaphragm at the end of level probe. A hydrostatic level sensor is a submersible pressure transmitter that has a pressure diaphragm at the end of level probe. This Hydrostatic is caused by the weight of the fluid on top of the transmitter and is used to calculate the level. And the inner side of the diaphragm is vented to atmospheric pressure.

SI-151 Hydrostatic Level Sensor
Hydrostatic Level Sensor (Best Price), also called Hydrostatic level transmitter. Continuous level measurement in liquid applications with pressure sensors.
SI-PCM261 Submersible Pressure Transducer
Submersible pressure transducer with 4-20mA output,
is normal submersible pressure transmitter for level measurement.
SMT3151TR Submersible Level Transmitter
Hydrostatic level transmitter is also called hydrostatic level gauge. The rod-type Hydrostatic level transmitter 4-20mADC standard signal output. Flange or threaded installation. Can withstand high temperatures up to 450 ℃.

Hydrostatic Level Indicators are suitable for measuring unsealed tanks. The applicable media of Hydrostatic Level Indicators include water, oil, etc. Hydrostatic Level Indicators are the lowest cost Tank Level Indicators.

Read more about: [What is and How it Works]Hydrostatic Level Sensor

Pressure/differential pressure Tank Level Measurement

Pressure/differential pressure Tank Level Indicators refers to Diaphragm Seal Pressure Transmitters. Usually installed at the bottom of the outer tank.

Diaphragm Seal pressure transmitter can measure pressure, liquid level and flow.When the environment is extremely hot or cold, or when the process connection is difficult to connect to the measuring instrument. When the measured medium is corrosive, sticky, sticky or easily cured. Or when the process is not chemically compatible with the instrument material. It is recommended to use a diaphragm seal.

Extended Diaphragm Seal DP Level Transmitter
Remote Seal Differential Pressure Transmitter
Differential pressure(DP) level transmitter

Pressure/differential pressure Tank Level Indicators are often used to measure liquid tanks with harsh medium conditions. Such as chemical liquids. High-temperature liquids, etc. The measuring instrument should not be placed in the tank, or the medium cannot touch the sensor.

Extended reading: Hydrostatic Pressure Transmitter

Magnetic Float Level Sensors for Tank Level

A float level sensor is a kind of continuous liquid level measurement sensor. Also called float level switch, float level gauge, float level transmitter.

Float level sensors are continuous level sensors. Float level gauges use magnetic floats as measuring elements. magnetic float that rises and falls as liquid levels change. The movement of the float will generate a magnetic field. The sensor’s internal resistance changes linearly, and the intelligent converter converts the resistance change into a 4~20mA standard current signal. It can display the liquid level percentage, 4~20mA current, and liquid level value on the spot. It can also output the switching value signal to conduct liquid Bit switch control. 

SI-U01 Float Level Sensor
SI-U02 Multi-Point Liquid Level Float Switch
SI-U03 Float Switch Water Level Controller
SI-U04 Magnetic Float Level Sensor-Reed Switch

Magnetostrictive Level Transmitters for continuous Tank Level Measurement

Magnetostrictive Level Transmitters are used for continuous measurement of liquid level and interface. Magnetostrictive level measurement is currently the best liquid level measurement and control technology.

Sino-Inst’s Magnetostrictive Level Transmitters can provide two independent outputs: interface; overall level. It can be applied when the difference in specific gravity drops to 0.02. Magnetostrictive Level Sensors Commonly used for the measurement of the oil-water interface. And others include acid tanks, propane containers, desalter and sewage tanks. Magnetostrictive Level Transmitters are composed of three parts: probe rod, circuit unit and magnetic float. The flexible cable type and the outer buoy type are derived from the basic model. And has a variety of communication modes 4~20mA, 0~5V, 0~10V, HART, RS-485 and so on.

Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor

Magnetic Level Gauge for Tank Level Indicate

Magnetic Level Gauge can be widely used in petroleum, chemical, oil field, medicine, food, wine and other industries. Various storage tanks, reaction tanks, fermentation tanks, liquid ammonia storage tanks, boiler drums, high-pressure heaters, evaporators and other pressure vessels. Medium liquid level compatible with 304, 321, 316L, 0Cr18Ni9, 304 or 0Cr18Ni9+PTFE, 00Cr17Ni14Mo21Cr18Ni9Ti, PVC, PP and other materials. Even two different media interface measurement and display.

Magnetic Level Gauge can be reliably used for liquid level detection in high temperature, low temperature, high pressure, strong corrosion, highly toxic and dangerous environments.

Extended reading: Diesel fuel tank level gauges & indicators

Radar Measurement of Tank Level

Radar level transmitters use radar technology to perform non-contact continuous level measurement. The radar level indicator converts the level into an electrical signal. The level signal output can then be utilised by other instrumentation to monitor or control. Liquids and solids are commonly measured with this measuring technique. Like: Fly ash silo. Radar level sensors are divided into: Pulsed radar technology and frequency modulated continuous wave (FMCW) radar level sensors.

Sino-Inst produces 120GHz FMCW radar level sensor, 26GHz radar level meter, 6GHz level meter.

Extended reading: Non Contact Liquid Level Sensor Working Principle

Ultrasonic Tank Level Indicators

Ultrasonic Level Sensing is a low-cost liquid level measurement technology. Ultrasonic Level Sensing sensors and transmitters are used for tank or river level measurement.

Extended reading: Ultrasonic liquid level sensors

Ultrasonic Level Sensing does not need to contact the medium, can be continuously measured, low cost. Therefore, Ultrasonic Level Sensing is very popular among users.

Ultrasonic liquid level sensors are available in general and intrinsically safe types. Output 4~20mA standard signal or output the measurement result to the secondary meter through RS-485. Meets the system’s automatic control.

Extended reading: ultrasonic level sensor price

Read more about: 7 Level Senors for Tank Level Measurement

Tank level indicators for common tanks

Water tank level indicator

Water tank level monitoring is the most common application of Tank level indicators.

Common water, purified water, application water, etc. Less impurities. If the tank is not sealed. It can be applied to the hydrostatic input level gauge. The lowest cost. The easiest to use.

Of course, if the tank is sealed. Or there are impurities in the water. A diaphragm seal differential pressure level transmitter can be used.

According to your actual measurement installation situation, you can also choose other applicable Tank level indicators and Tank Level Gauges.

Read more about: Water Tank Level Sensors for Level monitoring and Auto-control

Propane tank level indicator

Propane is a gas that can be liquefied. Chemical formula CHCHCH, colorless, liquefiable gas. Slightly soluble in water, soluble in ethanol and ether.

Common Industrial Propane Tank Level Indicators for Industrial Tank Level Measurement include: radar level sensor; magnetostrictive level sensor; float level gauge; magnetic flap level gauge; ultrasonic level gauge.

What kind of level gauge is used for Industrial propane level measurement?

Please refer to:

Fuel & oil tank level indicator

Measure the level of oil storage tanks. We recommend the use of a magnetostrictive level gauge or an externally attached ultrasonic level sensor.

Advantages of magnetostrictive level gauge for measuring oil tank level:

  • The magnetostrictive liquid level gauge can simultaneously measure multiple parameters such as liquid level, interface level, and temperature.
  • The measurement range is large, and the maximum measurement range can be 20m.
  • Measurement grade products, high measurement accuracy, can reach up to ±1mm.
  • Using pure electronic technology to measure, so there is no wear, safe and reliable, and long service life
  • The measurement accuracy is not affected by factors such as the shape of the container and the steam in the container.
  • No need for regular calibration, easy installation and maintenance without tank cleaning.
  • Multiple signal output, easy to realize the monitoring function of the system.
  • The product design meets the requirements of explosion-proof standards, and achieves explosion-proof and intrinsically safe certification.

Extended reading: Capacitance level sensor advantages and disadvantages

Advantages of Ultrasonic Tank Level Sensor-External Mounted

  • Non-contact measurement function ——– Ultrasonic sensor probe is external. No need to open a hole in the container to be tested.
  • Auto-calibration function——–With self-calibration function. It overcomes the problem of reduced accuracy after long-term use of traditional liquid level gauges.
  • Infrared online debugging function——–Applicable to occasions where it is not suitable to open the cover for testing in dangerous situations. At the same time, it reduces the difficulty of debugging.
  • Self-diagnosis function——–It has its own working status diagnosis function. It also has hardware diagnosis function. It enhances the reliability and stability of the level gauge.
  • One-key recovery function——–When the external measuring level gauge works abnormally, it can be restored to the normal state with one key through the debugger.
  • Local display and remote transmission function——–The level gauge can not only display the level value on the spot in time. But also remotely transmit it to the control room through the signal line.

Extended reading: GWR Corrosive Liquid Chemical Level Sensor

large water tank level indicator

In industrial production, water tanks are widely used. In many production equipment, the measurement and control of the water tank level is directly related to the normal operation of the process production process. At present, there are many methods for measuring and controlling the liquid level of the water tank, each with its own strengths.

  1. If the site is an open tank, it needs to have a remote transmission function. If there is no requirement for a scale, it is recommended to use a submersible level gauge. The cost is low. The principle of cable-type diffusion silicon. Simple and easy to use. , 24V power supply.
  2. If the site needs to have a scale and a remote transmission function. That is to use a magnetic float level gauge with a remote transmission function. That is, the liquid level can be displayed on site. And the liquid level can be transmitted to the control room or PLC for display.
  3. Pressure type liquid level transmitter. This is also the simplest principle of using pressure to display the liquid level height. It is installed at the bottom of the side-loading tank. 24V power supply.
  4. Ultrasonic level gauge. When the ultrasonic level gauge is used, there should be no foam on site. Otherwise, the display will be inaccurate. The clean water pool can be used.

These are all very simple level gauges. But in fact, they still need to be selected according to the working conditions. Before purchasing, it is best to ask the manufacturer.

Read more about: Types of water level controller

You may like:

Extended reading: Types of Fuel-Diesel Level Sensors

If you need to measure the tank level. But you still don’t know how to choose suitable Tank level indicators and Tank Level Gauges, please contact Sino-Inst sales engineer.

Sino-Inst offers over 30 Tank level indicators and Tank Level Gauges for level measurement. About 50% of these are Radar level meters, 40% is the magnetic level sensor.

A wide variety of Tank level indicators and Tank Level Gauges for level measurement options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Tank Level measurement instrumentation, located in China.

5 Industrial Propane Tank Level Indicators

Propane tank level indicator is also called propane tank gauge level indicator, or propane tank level gauge. What kind of level gauge is used for Industrial propane level measurement?

Propane is a gas that can be liquefied. Chemical formula CHURCH, colorless, liquefiable gas. Slightly soluble in water, soluble in ethanol and ether.
Common Industrial Propane Tank Level Indicators for Industrial Tank Level Measurement include radar level sensor; magnetostrictive level sensor; float level gauge; magnetic flap level gauge; ultrasonic level gauge.

Sino-Inst offers a variety of  Level Transmitters for level measurement. If you have any questions, please contact our sales engineers.

Featured Propane Tank Level Indicators

Read more about 7 Level Senors for Tank Level Measurement

How to Measure Propane Tank Level

Radar level transmitters use radar technology to perform a non-contact continuous level measurement. The radar level indicator converts the level into an electrical signal. The level signal output can then be utilized by other instrumentation to monitor or control. Liquids and solids are commonly measured with this measuring technique. Like: Fly ash silo. Radar level sensors are divided into Pulsed radar technology and frequency modulated continuous wave (FMCW) radar level sensors.

Sino-Inst produces 120GHz FMCW radar level sensor, 26GHz radar level meter, 6GHz level meter.

Extended reading: Radar Oil Tank Level Sensor

⑴ The working principle of the magnetic level gauge is based on Archimedes’ law.
Using the principle that the weight of the float is equal to the weight of the volume of the liquid discharged by the float, the float-equipped with magnetic steel changes with the change of the liquid level.
The position of the magnetic line of force in the float (that is, the actual liquid level position) drives the turning column and the turning plate through magnetic action. When the liquid level rises, the liquid phase turns red.
When the liquid level drops, the gas phase turns white or black. So as to clearly indicate the change of the liquid level in the container.

⑵ A ruler is installed on the display panel so that the liquid level can be read directly. A valve is installed at the lower end of the body for sampling and draining.

The most significant feature of the Magnetic propane tank level indicator is that the liquid medium is completely isolated from the indicator. So it is very safe and durable under any circumstances. Moreover, various types of liquid level gauges are equipped with liquid level alarm and control switches, which can realize the upper and lower limit offside alarm control or interlocking of the liquid level or boundary level.

Equipped with a dry reed chipset liquid level transmitter, it can convert liquid level and boundary signals into two-wire 4-20mADC standard signals. It is transmitted to the computer, regulator, and liquid level indicator to realize remote indication, detection, recording, and control.

Magnetic level gauges are widely used for liquid level measurement and control in various production processes such as petroleum, chemical, metallurgy, pharmaceutical, food, and electric power.

Extended reading: Industrial Tank level indicators and Tank Level Gauges

Float level sensors are continuous level sensors. Float level gauges use magnetic floats as measuring elements. magnetic float that rises and falls as liquid levels change. The movement of the float will generate a magnetic field. The sensor’s internal resistance changes linearly, and the intelligent converter converts the resistance change into a 4~20mA standard current signal. It can display the liquid level percentage, 4~20mA current, and liquid level value on the spot. It can also output the switching value signal to conduct liquid Bit switch control. Float level sensors are low-cost liquid level measurement and control instruments.

You can choose single-point or multi-point measurement and control. Can bring huge profit difference for OEM. float level sensors can be used for liquid layer measurement. Such as oil/water tanks, liquid material inventory, and measurement in high temperature, high pressure, and corrosive environments.

Extended reading: Fuel-Diesel-Water Tank Level Sensor Monitoring

Magnetostrictive Level Transmitters are used for continuous measurement of liquid level and interface. Magnetostrictive level measurement is currently the best liquid level measurement and control technology.Sino-Inst’s Magnetostrictive Level Transmitters can provide two independent outputs: interface; overall level. It can be applied when the difference in specific gravity drops to 0.02.

Magnetostrictive Level Sensors Commonly used for the measurement of the oil-water interface. And others include acid tanks, propane containers, desalter and sewage tanks.

Magnetostrictive Level Transmitters are composed of three parts: probe rod, circuit unit and magnetic float. The flexible cable type and the outer buoy type are derived from the basic model. And has a variety of communication modes 4~20mA, 0~5V, 0~10V, HART, RS-485 and so on.

Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor

The external measurement type level gauge is also called the externally attached ultrasonic level gauge. Its working principle is ultrasonic echo ranging, that is, ultrasonic waves are transmitted through the tank wall and then conducted in the liquid medium, and the liquid surface returns to the bottom to be received by the sensor. The height of the liquid level is calculated by the time difference. On-site OLED display, while realizing remote transmission of monitoring liquid level, realizing automatic control.

Field of application of external level gauge:

  • The level gauge has a wide range of applications. In particular, the application of liquid level measurement for flammable, explosive, highly corrosive, toxic and harmful pressure vessel storage tanks is more prominent;
  • Oil refinery: liquefied gas, propylene, propane, ethane spherical tank / horizontal tank level gauge
  • Chlor-alkali industry: liquid chlorine storage tank level gauge
  • Synthetic ammonia device: liquid ammonia spherical tank/horizontal tank level gauge
  • Silicone industry: spherical tank/horizontal tank level gauges such as silicon trichloride, silicon tetrachloride, trichlorosilane, etc.
  • Refrigeration industry: liquid ammonia, dichloroethane, hydrogen fluoride and other storage tank level gauges
  • Level gauge applications in other chemical fields.

Read more: Guide: Non-contact Ultrasonic Level Sensing transmitters

Maybe you also need to measure the propane tank flow. Then you can refer to: Industrial LPG/Propane flow meter.

Still have questions?

If you cannot find an answer to your question in our FAQ, you can always contact us
and we will be with you shortly.

Maybe you also need to measure the propane tank flow. Then you can refer to: Industrial LPG/Propane flow meter.

Large Propane Tank Level Indicator

The External Ultrasonic Tank Level Sensor adopts the sonar echo ranging principle. It overcomes the influence of the tank wall on the transmission of ultrasonic signals. It adopts advanced digital signal processing technology. It can truly realize the non-contact, high-precision measurement of the liquid level in the tank.

The External Ultrasonic Tank Level Sensor can output 4-20mA standard signals or output the measurement results to the upper computer (or secondary meter) through the RS-485 interface. It can meet the automatic control of the system.

Extended reading: Diesel fuel tank level gauges & indicators

Wide measuring range

Range specifications are optional: 3m, 5m, 10m, 20m, 30m

Non-contact level measurement function

The ultrasonic sensor (probe) is installed externally, and there is no need to open a hole in the container to be tested.

Testable container:

Wall thickness: 2~70mm;
Tank type: horizontal tank, spherical tank, tank, vertical tank, etc.

Frequently
Asked
Questions

Our level gauge supports local display when measuring propane tank. It also supports remote signal output such as 4-20mA. Can be used for liquid level monitoring of the control system.

Extended reading: How does a Radar Corrosive Liquid Chemical Level Sensor work?

When the ultrasonic liquid level sensor is working, the high-frequency pulse sound wave is emitted by the transducer (probe). It is reflected on the surface of the measured object (water surface). The reflected echo is received by the same transducer (probe) and converted into an electrical signal. The time between sending and receiving the pulse (the movement time of the sound wave) is proportional to the distance from the transducer to the surface of the object.

The relationship between the distance s of sound wave transmission and the speed of sound c and the transmission time t can be expressed by the formula: s=cⅹt/2
The acoustic wave is a kind of media that transmits information. It is closely related to mechanical vibration. The mechanical vibration produced by the impact and movement of objects spreads outward in the form of waves. According to the frequency of the wave generated by the vibration, it is divided into audible sound waves, infrasound waves, and ultrasonic waves. The sound waves higher than 20khz are called ultrasonic waves.
Extended reading: Guide to Ultrasonic Level Transmitters

A magnetic Level Gauge is also called a magnetic level indicator. Magnetic Level Gauge is developed based on the principle of buoyancy and magnetic effect. The magnetic float in the measuring cylinder drives the two-color turning column on the external display of the measuring cylinder to flip with the increase (decrease) of the liquid level to be measured. As the position of the float changes, the indicator moves up and down the same amount. Supports top-mounted and side-mounted. It can be used for liquid level detection in high temperature, low temperature, high pressure, strong corrosion, highly toxic and dangerous environments.

Read more about: Ultrasonic Tank Level Sensors for Tank Level Monitoring

Sino-Inst offers over 10 Propane Tank Level Indicators for level measurement. About 50% of these are Radar level meters, 40% is the magnetic level sensor.

A wide variety of Propane Tank Level Indicators for level measurement options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Propane Tank Level measurement instrumentation, located in China.

Radar Level Measurement System for High Temperature Blast Furnace

Radar Level Measurement System for High-Temperature Blast Furnace. This article is a case introduction for a customized radar level system.

What is a blast furnace?

The blast furnace uses a steel plate as the furnace shell, and the shell is lined with refractory bricks. The blast furnace body is divided into five parts from top to bottom: throat, body, waist, belly and hearth. Due to the advantages of good technical and economic indicators of blast furnace ironmaking, simple process, large production volume, high labor production efficiency and low energy consumption, the iron produced by this method accounts for the vast majority of the world’s total iron output.

During blast furnace production, iron ore, coke, and slag-forming flux (limestone) are charged from the top of the furnace, and preheated air is blown from the tuyere located at the lower part of the furnace along the furnace circumference.

At high temperature, the carbon in the coke (some blast furnaces also inject auxiliary fuels such as pulverized coal, heavy oil, natural gas, etc.) and the oxygen in the air are combusted to generate carbon monoxide and hydrogen. Oxygen, thereby reducing to obtain iron.

The smelted molten iron is released from the iron mouth. Unreduced impurities in iron ore and fluxes such as limestone combine to form slag, which is discharged from the slag port.

The generated gas is discharged from the top of the furnace, and after dust removal, it is used as fuel for hot blast stoves, heating furnaces, coke ovens, boilers, etc.

The main product of blast furnace smelting is pig iron, as well as by-product blast furnace slag and blast furnace gas.

Read more about: Common Types Of Heating Oil Tank Level Sensors

Difficulties in Level Measurement of Blast Furnace Silo

The level detection and control of blast furnace silo is very important to ensure the continuous production of blast furnace. However, due to the particularity of its working conditions, the material level measurement has the following difficulties:

  1. The temperature is too high.
    The temperature of the blast furnace silo is high. Its working temperature range is generally between 200 and 300 ℃.
  2. The dust is large.
    The dried raw materials in the blast furnace silo. Such as carbon, lime, ores, etc., will emit a large amount of dust suspended in the air during the feeding and production process.
  3. Strong impact and wear.
    The height of the blast furnace silo is much higher than that of ordinary containers. The solid material such as block material inside it will have a large downward gravitational impact on the measuring instrument during the feeding process. And each time it causes different degrees of wear and tear to the measuring instrument.
  4. The dielectric constant varies greatly.
    Since the material ratio will change and the mixing is not uniform, it may also be affected by a small amount of steam. Therefore, the dielectric constant of the medium changes greatly. At the same time, more dust in the blast furnace will also interfere with the dielectric constant.

Extended Reading: Dielectric constant for radar level transmitter

What kind of level meter can be used for blast furnace level measurement, can radar level meter be used?

To solve the problem of blast furnace level measurement, it is possible to use a radar level gauge to measure it. The radar level gauge is a continuous level measuring instrument with a measurement accuracy of up to ±1mm. The temperature can meet the measurement conditions of 1200 degrees, and fully meet the blast furnace material level measurement conditions.

In the blast furnace level measurement process, the most important thing is the selection of the level meter. Only when the on-site measurement conditions are met, can the work efficiency be effectively improved. The selection of radar level gauge can be based on three parameters of measuring medium, temperature and pressure. The second is its installation method and output signal. In this way, the difficult problem of blast furnace level measurement can be easily solved.

Extended Reading: Featured Silo Level Sensors

Introduction of Radar Level Measurement System for High-Temperature Blast Furnace

In the picture:

1. Dryer: The function of the dryer is to dry compressed air. The compressed air used for the radar purging device must be dewatered and dry compressed air. In order to ensure the service life and function of the radar device.

Air-conditioning gun: It can cool down the compressed air. After the compressed air processed by the cold air gun reaches the radar purge device, it has a cooling effect. Can protect radar.

If the dryer and the air-conditioning gun are configured at the same time, there is basically no maintenance problem after installation. It can be used normally for a long time.

The dryer and air-conditioning gun can also be configured with only one choice. Radar can also work very well. However, maintenance may occasionally be required.

The configuration of the dryer and air-conditioning gun is up to you according to your budget.

2. Solenoid valve + time relay control, their function is to control the purge frequency and time. Save energy costs.

We will make a small explosion-proof control cabinet.

After installation, you only need to set the purge frequency and time. The purge frequency and time need to be set according to the dust situation in your furnace.

3. Purge device. Use compressed air to purge the dust in the furnace while cooling down.

4.120GHz FM continuous radar level meter

5. Compressed air pipeline. The distance between the dryer and the radar must not be longer than 30 meters. That is, 5. The total length of the compressed air pipeline cannot exceed 30 meters.

6. Compressed air outlet

7.4-20mA or 485 output line. Choose according to your needs.

8. Air compressor. For supplying compressed air. Configure according to customer requirements. Customers can also purchase locally. Or, configure it in our factory.

Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor

Introduction of 120GHz FM continuous Radar Level Meter

  • Transmission frequency: 120GHz
  • Measurement accuracy: ±1mm
  • Measuring distance: 36m / 150m
  • Output mode: (4~20)mA+HART
  • Power supply: 24VDC
  • Debugging method: LCD
  • Temperature: Ambient temperature: -40℃~80℃
  • Process temperature: -40℃~200℃
  • Explosion-proof/protection grade: EX d C T6 Gb
  • Recommended use: Super strong dust storage tank, fast material flow conditions

The above parameters are conventional style parameters.

Extended reading: Radar Level Meter for Corrosive Liquids

The following table is a customized parameter list:

Code Description
0 Not explosion-proof Explosion-proof requirements
1 Explosion-proof
1 liquid Measuring medium
2 solid particles
3 solid powder
A 24VDC power supply
B 220VAC
1 Guided wave hard rod type Antenna type
2 Guided wave flexible cable type
3 Stainless steel bell mouth
4 rod antenna
5 Flat
6 Drop type
7 lens type
8 UHF 120GHz
9 Special custom
C Normal temperature type (-40~80)℃ Process temperature
H High temperature type (-40~200)℃ plus heat sink
G Ultra-high temperature type (-40~350)℃ high temperature material + heat sink
S Special high temperature (-40~1200)℃
F1 1.0MPa Pressure Level
F2 1.6MPa
F3 2.5MPa
F4 4.0MPa
S special
L1 threaded connection (order note) Process connection
D50 DN50 flange
D80 DN80 flange
D100 DN100 flange
S other
1 PP Flange material
2 Tetrafluoro
3 stainless steel
4 special
A 4-20mA output signal
B 4-20mA+HART
C RS485
C with purge Whether with purge
N without purge
L 0~70000mm optional Range

Therefore, according to your measurement requirements, our selection is

Ultra high frequency 120G radar level gauge, model: 03A8SF21003AC

[Blast furnace installation, temperature: 400 degrees, pressure: 1.6MPA, dust inside, range: 30 meters, power supply: 24VDC, output signal: 4-20MA, two-wire system, installation size: DN100PN16 flange, with purge interface]

Extended Reading: Case: High Temperature Radar Level Transmitter for Melted Salt-Solar Photovoltaic Power Station

Necessity and feasibility of using radar level meter for blast furnace molten iron

The replacement of each product has its necessity and feasibility. It is also necessary and feasible to use radar level gauges to replace manual visual inspection in ironworks.

Before the radar level meter entered the ironmaking plant, many factories used manual visual inspection to measure the liquid level in the blast furnace. This method has many advantages and many limitations.

First of all, the molten iron temperature in the blast furnace is very high, sometimes as high as 1490 ℃, and even exceeds this temperature. Manual visual inspection requires close observation, which is very dangerous for employees who are visually inspecting.

Other seasons are fine. In winter, the visibility is low, the fog is heavy, the degree of danger is self-evident, and the accuracy of the measurement is also very poor.

Secondly, factors such as man-made or weather can easily cause the molten iron cans to be canned or overflowed, resulting in production accidents.

From the above two limitations of manual visual inspection, it is very necessary for ironworks to use meters. At least the safety of employees is guaranteed, and production accidents caused by molten iron overflow can be avoided.

Purge Device

The purging device uses the dynamic pressure compensation method of hydrodynamics to truly reflect the pressure value of each measuring point online. The purging pressure is greater than the measured pressure, which completely solves the blockage and burning of the pressure measurement pipeline under the condition of dusty and high temperature. The use of pressure regulators can stabilize the gas source provided by the power plant to ensure that the flow rate output by the flow controller is stable and runs reliably for a long time.

In the following conditions, a purging device needs to be added to the blast furnace liquid level measurement system:

First, when the measured powder concentration is relatively large, it is necessary to purge;
Second, the concentration of vapor in the measurement medium is relatively large, and condensation is easy to form on the surface of the sensor, which must be purged.
Third, when the temperature is too high, purging and cooling can also be increased.

Quotation for Radar Level Measurement System for High-Temperature Blast Furnace

ConfigurationDescriptionPrice/PC
120G radar level gaugeModel: 03A8SF21003ACUSD ?898.50
DryerAdsorption dryerUSD ?25.00
Air Conditioner USD ?50.00
Solenoid valve controlSolenoid valve + time relay controlUSD ?60.00
Air compressorFor supplying compressed airUSD ?05.00

Extended Reading: Case: High Temperature Radar Level Transmitter for Melted Salt-Solar Photovoltaic Power Station

Featured Radar Level Transmitters

Measuring medium: liquid;
Measuring range: 0.05m~30m;
Process connection: G1½A / 1½NPT thread / flange ≥DN50;
Process temperature: -40~80℃;
Process pressure: -0.1~0.3 MPa;
Antenna size: 32mm lens antenna;
Antenna material: PTFE

SI-FMF12 Frequency Modulated Continuous Wave Radar Level Sensor

Measuring medium: liquid Measuring range: 0.05m~35m Process connection: G2A thread/flange≥DN65 Process temperature: -40~110℃ Process pressure: -0.1~1.6MPa Antenna size: 42mm lens antenna Antenna material: PTFE

SI-FMF13 FMCW Radar Water Level Sensor

Measuring medium: liquid
Measuring range: 0.1m~100m
Process connection: flange ≥DN80
Process temperature: -40~110℃
Process pressure: -0.1~0.3MPa
Antenna size: 78mm lens antenna
Antenna material: PTFE

SIRD-901 Radar Corrosive Liquid Chemical Level Sensor

Application: various corrosive liquids
Measuring range: 10 meters
Process connection: thread, flange
Process temperature: -40~130℃
Process pressure: -0.1~0.3 MPa
Accuracy: ±5mm
Protection level: IP67

SIRD-902 Drop Antenna Radar Tank Level Sensor

Application: temperature-resistant, pressure-resistant, slightly corrosive liquid
Measuring range: 30 meters
Process connection: thread, flange
Process temperature: -40~130℃ (standard type) / -40~250℃ (high temperature type)
Process pressure: -0.1~4.0MPa
Accuracy: ±3mm
Protection level: IP67

SIRD-902T Microwave Radar Liquid Level Sensor

Application: corrosive liquid, steam, volatile liquid
Measuring range: 20 meters
Process connection: flange
Process temperature: -40~130℃ (standard type) / -40~250℃ (high temperature type)
Process pressure: -0.1~2.0MPa
Accuracy: ±3mm
Protection level: IP67
Frequency range: 26GHz

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Sino-Inst offers over 10 Radar level transmitters for level measurement. About 50% of these are Radar level meters, 40% is the tank level sensor.

A wide variety of radar level meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of radar level measurement instrumentation, located in China.

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Sanitary Flow Meters for Sale

Common sanitary flow meters are sanitary magnetic flow meters and sanitary turbine flow meters. Composed of 304/316 stainless steel. A Sanitary flowmeter with Tri-Clamp fittings is easier to install and disassemble. Suitable for the food hygiene industry.

The sanitary flowmeter uses a new sanitary lining material and lining technology. At the same time, a stainless steel casing and a stainless steel clamp connection are used to facilitate the quick disassembly and cleaning of the sanitary flowmeter. It is not easy to be polluted, and can effectively prevent the accumulation of measuring fluid residue in the measuring tube. It is used in the production process of mineral water, soy sauce, jam, beer, fruit juice, rice wine, milk and other foods and in the fields of hygiene and chemical industry.

Sino-Inst offers a variety of Sanitary flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Featured Sanitary Flow Meters for Sale

In this article, except for the sanitary magnetic flow meter and sanitary turbine flow meter. We will fully analyze the sanitary flow meter for you. And introduce other types of sanitary flow meters. This is the best Sanitary Flow Meters Buyer’s Guide.

Sanitary Turbine Flow Meter

Sanitary turbine flow meters have stainless steel bodies and come standard with Tri-Clover fittings. A Sanitary flow meter is suitable for measuring liquid without impurities. It can output pulse frequency signals. It is used to detect instantaneous flow and total integrated flow. A Sanitary flow meter can be used in food, sports drink, liquor, and other beverage industries, in preprocess applications.

Sanitary Turbine Flow Meter reference price: DN50USD 300-700/pc.

  • Meets the requirements of 3-A Sanitary Standard number 28-04
  • 316L stainless steel body and internal wetted parts
  • Consistent, reliable gas flow measurement
  • Wafer mounting configuration for limited space requirements
  • Anti-corrosion and anti-rust materials, suitable for the health industry;
  • Quick-load structure, easy to install and maintain;
  • High precision and good repeatability;
  • High-quality turbine, beyond the conventional range;

Know more about: Turbine type Flow Meter

Sanitary Magnetic Flow Meter

Sanitary Flow Meter uses a new type of sanitary lining material and lining technology, which meets the sanitary requirements of the food industry. It uses a stainless steel shell and stainless steel clamp connection. It is convenient for the quick disassembly and cleaning of the electromagnetic flow meter. Magnetic flow meter in a sanitary version which meets the strict requirements of the food-processing and bio-technology/ pharmaceutical industries.

Extended reading: Industrial Magmeters

  1. The sensor adopts new sanitary lining material. Prevent the accumulation of measuring medium residues in the measuring tube.
  2. The sensor adopts a quick connection scheme. The electromagnetic flowmeter is easy to disassemble, maintain and clean.
  3. The converter uses a 16-bit embedded microprocessor for signal processing. It has high integration and fast calculation speed. The calculation accuracy is high. Fully digital signal processing. Strong anti-interference ability. Features such as reliable measurement.
  4. The intelligent converter can simultaneously display measurement data such as volume flow percentage, instantaneous flow, and cumulative flow.
  5. The flowmeter is a two-way measuring system with three totalizers inside. Forward total, reverse total, and difference total. It can display positive and negative flow.
  6. With digital communication signal output such as current, pulse, RS485, RS232, Hart and Modbus.

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Sanitary Metal Rotameter

The sanitary metal tube float flowmeter has local display type and intelligent remote transmission type. With pointer to display the instant / cumulative flow liquid crystal display. Upper and lower limit alarm output, cumulative pulse output, batch control, standard two-wire 4-20mA current output and other forms. Provides a very broad choice for users to use. In addition, the instrument uses advanced micro-processing central chip and high-quality industrial components. Ensure the excellent performance of the flowmeter in various applications.

Extended reading: How does a rotameter work

  1. Suitable for flow measurement of small-diameter and low-velocity media;
  2. Reliable work, small maintenance, and long life;
  3. The requirements for straight pipe sections are not high, and the wider flow ratio is 10:1
  4. Double-line large LCD display, optional on-site instantaneous/accumulated flow display, with backlight;
  5. Single-axis sensitive indication;
  6. All-metal structure, suitable for high temperature, high pressure, and strong corrosive media;
  7. It can be used in flammable and explosive hazardous situations.

Rotameter flow meter-Variable Area Flow Meters

Sanitary Differential Pressure Flowmeter

The left part of the sanitary differential pressure flowmeter is a sanitary stainless steel shell, and the right part is the electronic component cavity. The stainless steel shell is a straight-through pipe, and the interior is designed with no gaps and no dead ends. The internal surface of the straight-through pipeline is sanitary polished.

A differential pressure sensor diaphragm is arranged in the straight-through pipeline to form a throttling device. The front side of the diaphragm of the differential pressure sensor faces the direction of fluid flow. The negative side of the diaphragm of the differential pressure sensor is parallel to the flow direction of the fluid. When fluid flows through this straight-through pipeline, due to the throttling effect of the differential pressure sensor capsule inside the pipeline, a pressure difference is formed on the positive and negative sides of the differential pressure sensor capsule.

The differential pressure sensor capsule is provided with a Swiss ROCKSENSOR differential pressure measurement chip, a static pressure measurement chip and a temperature measurement chip. It can measure and obtain the differential pressure signal on the positive and negative side of the differential pressure sensor capsule, the static pressure signal of the pipeline and the temperature signal of the fluid.

Sanitary Slurry Flow Meter

Flow measurement of Slurry and Solids is one of the most challenging applicaiton for magmeters. In wide industrial slurry pipelines, Magnetic Flow meters are ideal choice. Mag flow meters are ideal for any dirty liquid which is conductive or water based. Some types Ultrasonic flow meters can also measure flow rate of slurry, but the cost is too high. So, if you need to measure the flow of slurry or solids, We recommend using an electromagnetic flowmeter.

Extended reading: Stainless steel flow meters|304-316 optional

Tri Clamp Flow Meter

Tri Clamp Flow Meter’s clamp-type quick couplings are also called Tri-Clamp fittings.
The clamp is a connecting device for connecting grooved pipe fittings, valves and pipeline fittings. Used to tighten the connection between the quick connectors. Generally the joints are provided with gaskets, rubber, silicone and PTFE. It has good performance, high sealing and easy installation.

Advantages of Tri Clamp Flow Meter:

  1. Fast. There is no need for welding and re-galvanizing, and the installation speed is more than 3 times faster than flange connection.
  2. Simple. It is lighter than the flange, the locking mechanism is cleverly designed, the number of bolts is small, and there is no need to lock the holes.
  3. Reliable
    ①The clamp, washer and pipe end groove are compressed on the whole circumference, and the pipe end tensile strength is high, the test pressure reaches 4.2MPa, the temperature is -30℃~100℃, and the vacuum degree can reach 0.08MPa;
    ②The gasket is designed as type C, which can form triple leakage prevention. The greater the pressure in the pipe, the better the seal;
    ③The gasket material can be selected appropriately according to the fluid medium, pipe material and temperature.
  4. Vibration isolation and shock absorption
    ①Because the gap at the end of the pipe can effectively cut off the transmission of noise and vibration, the pipeline will not be affected during thermal expansion and contraction;
    ②The sealing gasket can also absorb noise and vibration.
  5. Economy and safety are convenient for project budget, and it can save 20% of total project cost compared with flange connection. Construction does not require power, oxygen, or open flames.
  6. Zero pollution. Because there is no welding slag and damage to the galvanized layer and the plastic layer in the original installation, the pipeline can be guaranteed to be unblocked. The connected pipeline, especially the fire sprinkler system, will not rust and block the equipment, sprinkler heads, etc. in the pipeline due to other connections.
  7. Take up less space
    ①Flange installation space is 3:2 compared with clamp joint.
    ②The clamp joints and accessories can be installed first, and can be adjusted in any direction and angle, and the piping is free.
  8. Easy maintenance.
    Disassembly, washing and replacement only need to remove two clamps and four bolts, which is convenient for pipeline extension, replacement and rotation direction. Even wear.

Extended reading: Gas Rotameter Tips

3A Sanitary Flow Meters

The “3-A” standard is recognized as an important international health standard, and people in the industry will often mention it. Since 1956, the 3-A mark has become a registered mark used to prove that the materials, hygienic design, and production and assembly procedures of the equipment affixed to the label meet the requirements of the 3A standard. In order to improve the credibility of the 3-A mark, in 2003, under the leadership of the 3-A SSI, the third party verification (TPV) was implemented.

With the continuous development and progress of the certification, the 3-A symbol far exceeds a symbol. Based on decades of cooperation and recognition of key stakeholders such as dairy products, food health experts, equipment manufacturers, etc., the 3-A brand has been widely recognized in the food processing equipment market. The value of 3A is manifested in many aspects of stakeholders:

1) The value of 3A to food processors
As leading manufacturers, processors and USDA and FDA regulatory health experts have participated in the development of the 3A standard. Users of dairy processing equipment can ensure that their equipment complies with all applicable hygiene regulations and can achieve effective cleaning. And it can be expected that the inspection by the regulatory agency can be successfully completed.

2) The value of 3A to equipment manufacturers
Because of the high recognition of 3A in the sanitary equipment range. It has now become a passport to enter the US food, dairy, and pharmaceutical and sanitary equipment markets. It is also a symbol of global quality products. It is well-known in various markets around the world. Because the 3A symbol has been recognized by almost all health experts and regulatory officials. Products affixed with the 3A logo can be widely accepted worldwide.

At the same time, because each standard details the hygienic aspects of materials, design and manufacturing. Therefore, the equipment meets the requirements of processors and health experts. Standards also reduce mold, tooling costs, and the expected delivery time due to the lack of uniform standards. At the same time, 3A certification has also formed a huge marketing advantage.

Extended reading: Vortex Hygienic Flow Meter

Clamp-on flowmeter for sanitary industry

Clamp on flow meter (Model: 2000) is composed of an integrated host and ultrasonic clamp on sensor. Clamp on flow meter is widely used in online flow measurement of various liquids. Just stick the external clamp sensor on the pipe surface. Compared with the traditional flowmeter, it does not need to cut off the pipe and flow. The installation is convenient and quick, and the non-destructive installation is truly realized.

Clamp on Flow Meter Reference price: USD 470.00/pc

Handheld Ultrasonic Flow Meter ( Model:2000H) has been successfully applied to measurement work in various industries. The measuring range is 20-6000mm (0.5-20 inches). A non-contact measurement method is adopted. Flexible operation and easy to carry. Conductive or non-conductive, corrosive or non-corrosive liquids can be measured. Various fluids: water, pure water, sewage, sea water, chemical fluids, river water, fuel Oil etc. can be measured.

Handheld Ultrasonic Flow Meter Reference price: USD 470.00/pc

Extended reading: Food grade flow meters for Food & Beverage industry

Application of sanitary flow meters

Typical applications include measuring or batch controlling water, WFI, USP water, deionized water, vaccines, clean pharmaceuticals, milk, cream, vegetable oil, wine, beer, spirits, soft drinks, juices (without pulp), and any other clean, consumable liquid.

Application Examples:

  • Sanitary
  • Food Processing
  • Pharmaceutical
  • Industries Process or Industrial
  • Pharmaceutical industry:
    • filling and metering of infusion products such as saline and glucose water;
  • Food and beverage industry:
    • filling and metering of liquid foods such as vegetable juice, juice, beer, and refined oil.
    • brewery

Read More about: Chemical Flow Meter Guide

FAQ

Where should a flow meter be placed?

Different types of flow meters have different requirements for the choice of installation location. Where to install the specific flowmeter, you need to decide according to the product you purchase.
Such as electromagnetic flowmeter.
1. Choice of installation site:
  ·Choose a place where there is no negative pressure in the measuring tube;
  ·Avoid installing in strong electric equipment accessories such as motors, transformers, etc., to avoid electrical interference;
  ·Avoid places with strong corrosive gas around the installation location;
  ·When measuring mixed-phase fluids, avoid places that cause phase separation;
  ·The ambient temperature should generally be within the range of -25℃~60℃, avoid direct sunlight as much as possible;
  ·Installed in a vibration-free or small vibration environment, if the vibration is too large, fixed supports should be added to the pipes before and after the sensor;
  ·The relative humidity of the environment should be within the range of 10%~90%;
  ·Avoid installing in a place that can be directly drenched or submerged by rain;
2. Requirements for the length of straight pipe section: (D is the inner diameter of the flowmeter)
The electromagnetic flowmeter has relatively low requirements for the front and rear straight pipe sections. Generally for 90° elbows, T-shaped tees, reducers, fully open valves and other flow resistance parts. There should be a 5D straight pipe section away from the center line of the electrode axis of the electromagnetic flowmeter (not the end face of the sensor).
For valves with different opening degrees (such as valves with adjustable opening degrees), the length of the upstream straight pipe section needs to be 10D. One
Generally, the straight pipe downstream of the sensor only needs 3D to meet the requirements. When measuring mixed liquids of different media, the distance between the mixing point and the flowmeter must be at least 30D.
3. Installation position and flow direction:
The electromagnetic flowmeter can be installed on the pipeline horizontally, vertically and obliquely

What does a flow meter control?

The flow meter itself does not have a control function. The flowmeter can output signals according to the requirements of your control system. Such as 4-20mA, pulse signal, etc. And HART or, RS485, etc.
If you need a flow meter with a switch output function, it should be a flow switch.

What is the most accurate flow meter?

Generally speaking, the accuracy of mass flow meters is the highest. What is measured is mass quantity, which is a flow meter often used as a trade settlement.
The flowmeter can generally reach 1.0 level, and 0.5 level is considered high accuracy. The accuracy of liquid flow meters is generally 0.2%-0.5%.
Of course, the accuracy of the flowmeter still depends on the site conditions. If the measurement of temperature and pressure is not very difficult, the accuracy of the flowmeter must be relatively high. In addition, to ensure the accuracy of the flowmeter, correct installation and use are also very important.

How do you clean a flow meter?

The cleaning method of the flowmeter should be determined according to the type of the flowmeter and the measured medium. It can be rinsed with water, or a cleaning solution can be used according to specific conditions. It is best to remove and clean.

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Sino-Inst offer over 10 Sanitary Flow Meters, with Best Price.

A wide variety of Sanitary Flow Meters options are available to you, such as free samples, paid samples.

About 13% of these are magnetic flow meter, 14% are Turbine Flow Meter, 25% are Venturi flow meter, 13% are Handheld ultrasonic flow meter, and others are Liquid mass Flow Meters.

Sino-Inst is Sanitary Flow Meters suppliers, located in China. Sanitary Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Sanitary Flow Meters respectively.

Natural Gas Flow Meter Selection Guide

A natural gas flow meter is mainly used for inline measurement of natural gas flow. The natural gas flow meter is mainly used for industrial production and trade settlement.

At present, the flowmeter products used for natural gas flow measurement roughly include: gas waist wheel flowmeter, gas turbine flowmeter, precession vortex flowmeter, thermal mass flowmeter, vortex flowmeter, ultrasonic flowmeter and orifice flowmeter Wait. Let’s make a simple comparison on the use of these flow meters.

Sino-Inst offers a variety of  Natural gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Featured Natural Gas Flow Meters

Natural Gas Flow Meter Types

The flow measurement of natural gas is currently mainly used in trade settlement and is relatively common. my country’s natural gas trade measurement is based on the volume or energy method under the legally required quality indicators for transfer measurement. At this stage, volume measurement is basically the main method.

At present, the flowmeter products used for natural gas flow measurement generally include: gas waist wheel flowmeter, gas turbine flowmeter, precession vortex flowmeter, vortex flowmeter, ultrasonic flowmeter and orifice flowmeter. Read more about: Industrial Gas Measurement with Digital Gas Mass Flow Meters

Let’s make a simple comparison on the use of these flow meters.

Roots flowmeter

Roots flowmeter is also called gas waist wheel flowmeter. Not only can it be used to measure dry gas, but also moisture (ie associated gas). Because the orifice flowmeter and turbine flowmeter are not suitable for measuring the associated gas containing droplets. Roots flowmeter has certain advantages because of no strict requirements. In addition, another advantage is that it is not sensitive to flow arterial movement.

But pay attention to the following points when measuring natural gas:

  1. Generally, a certain mesh filter should be installed upstream of the flowmeter. To prevent the flowmeter from being stuck or blocked. And to regularly discharge sewage and check and clean the filter.
  2. In order to prevent liquid accumulation in the measuring chamber of the flowmeter, the flowmeter should be installed vertically as far as possible. Or it is higher than the process pipeline, and the effusion should be discharged regularly.
  3. Before the flowmeter is put into use, it must be ensured that there are no impurities such as welding slag in the pipeline, and the bypass should be opened. Prevent the flowmeter rotor from running at high speed and damaging the flowmeter.
  4. It is necessary to observe and pay attention to the pressure before and after the flowmeter, and judge the fault in time.

In addition, Roots flowmeter has a big disadvantage. The noise is louder when the waist wheel rotates at a high speed.

Gas turbine flowmeter

Gas turbine flowmeter is a natural gas flow meter that is used more frequently at present. The advantages are simple structure and easy installation. The overall size is relatively small. The accuracy is high. The repeatability is good. The wide range can reach 15:1~25:1. In the case of high-pressure gas transmission, the range can be further increased.

The output of the gas turbine flowmeter is a pulse frequency signal. Therefore, when it is used with a programmable flow indicator, it is easy to obtain a lower system uncertainty.

The disadvantage of the gas turbine flowmeter is that the turbine rotates at a high speed, mechanical friction between the bearing and the shaft, and the service life is not very long. Therefore, attention should be paid to lubrication, and the lubrication method provided by the manufacturer can be used to regularly replenish lubricating oil.

In addition, if the high-speed gas contains larger solid particles, it is easy to damage the turbine blades. Therefore, a filter should be installed on the pipeline before the turbine flowmeter.

Precession vortex flowmeter

The precession vortex flowmeter is the first choice for some small natural gas distribution stations.

The advantage of precession vortex flowmeter: wide operating temperature range. The scope is large. The Reynolds number is within a certain range and is not affected by fluid temperature, pressure, density and viscosity. Strong applicability. Except for impurities with larger particles or longer fibers, no filter is generally required. The requirements for the upstream and downstream straight pipe sections are relatively low, just take the upstream 4D and downstream 2D ​​straight pipe sections. The output frequency has a linear relationship with the volume flow rate.

The disadvantage is that the pressure loss is relatively large. Secondly, the precession vortex flowmeter is a fluid vibration flowmeter, which is more sensitive to pipeline vibration and electromagnetic interference. Therefore, it can only be used in an environment with low vibration and no electromagnetic interference.

Vortex flowmeter

Vortex flowmeters are currently generally used in industrial and mining enterprises for internal natural gas assessment and energy consumption measurement applications.

The overall structure design of the vortex flowmeter is reasonable, the dynamic measurement range is wide, and the pressure loss is small.

The main body of the vortex flowmeter can be made of stainless steel, which is suitable for the measurement of corrosive media. The vortex flowmeter has no moving parts and is easy to install and maintain. On-site LCD display, pulse, 4-20mA output or 485 serial communication interface. It can be connected with industrial automation system and many other advantages.

Its biggest disadvantage is that it is afraid of vibration and electromagnetic interference.

Read more about: How Vortex Flow Meter measure efficiently? For steam, gas, liquid 

Gas ultrasonic flowmeter

Gas ultrasonic flowmeter is the latest technology flowmeter product. It has many advantages such as wide measurement range, high measurement accuracy, no pressure loss and movable parts, and low installation and use costs. So far, the governments of 12 countries including the United States, the Netherlands, the United Kingdom, and Germany have approved gas ultrasonic flowmeters as legal measuring instruments for natural gas.

The accuracy of the gas ultrasonic flowmeter is not only related to the flow rate, but also related to the gauge diameter. For small-caliber instruments, it is difficult to measure the sound wave propagation time in turbulent gas due to the short sound channel length. Therefore, it is difficult to improve the accuracy of small-caliber gas ultrasonic flowmeters.

Thermal mass flow meter

A true mass flow meter does not require temperature and pressure compensation for gas flow measurement. The measurement is convenient and accurate. The gas mass flow or standard volume flow can be obtained.

Thermal mass flow meters can perform:
Gas flow measurement in steel plants and coking plants.
Boiler air flow, secondary air flow measurement.
The flow rate of flue gas discharged from the chimney is measured.
Aeration flow measurement in water rights treatment.
Gas flow measurement in the production process of cement, cigarette and glass factories.
Compressed air flow measurement.
Flow measurement of mixed gas of various natural gas, coal gas, liquefied gas (gas), flare gas, argon gas, carbon dioxide and so on.
Gas flow measurement in coking plant.

Read more about: Gas Thermal Mass Flow Meter

Orifice flowmeter

Orifice flowmeter is currently the most used flow meter for measuring the flow of natural gas.

Over the past few decades, people have summarized dozens of special research and practical applications for natural gas measurement, and a qualitative leap has taken place on the basis of quantity. The hallmark is standardization. Even use a standard orifice flow meter. It is possible to determine the relationship between the signal (differential pressure) and the flow rate without real flow calibration, and to estimate its measurement error. It is currently the only one that meets this standard among all flow meters.

In order to eliminate the major shortcomings of its own output signal being analog signal, low repeatability, narrow range, large pressure loss, orifice flowmeter adopts microelectronics technology, computer technology, fixed-value throttle and standard nozzle technology. The device has further improved its technical level.

V cone flowmeter

The natural gas flow measurement can be measured with a V-cone flowmeter. The V-cone flowmeter has the advantages of high measurement accuracy and good stability. And in the subsequent use process, there is no need for maintenance, which can greatly improve work efficiency.

The main advantage of the V-cone flowmeter is that it has better stability than other flowmeters. Secondly speaking of caliber, V cone flowmeter has a wide range ratio. Can do DN3000 caliber. It is also unmatched by other flow meters.

In short, these 8 types of flowmeters have their own advantages and their shortcomings in the measurement of natural gas flow.

Extended reading: What Is A Venturi Flow Meter?

Natural gas flow meter selection

Faced with so many varieties of natural gas flow meters, the selection has become a difficult problem.How to scientifically and objectively select the best flowmeter is a problem that needs attention.

We believe that the selection should follow appropriate rules. Try to avoid misleading propaganda from manufacturers. Blindly choose expensive ones.

Find a flow meter that is just right for yourself, it is your ideal flow meter.

Natural gas flow meter selection can be carried out in five aspects: Instrument performance. Fluid characteristics. Installation conditions. Environmental conditions and economic factors.

The various considerations are as follows:
Performance aspects of natural gas flow meters:Accuracy. repeatability. linearity. range. pressure loss. upper and lower limit flow. signal output characteristics. response time, etc.

Fluid characteristics of natural gas flowmeter:

Fluid pressure, temperature, density, viscosity. lubricity, chemical properties, numbness. corrosion, fouling, dirt, gas compressibility. iso-index, specific heat capacity, electrical conductivity. speed of sound, mixed-phase flow, pulsating flow, etc.;

Installation conditions of natural gas flowmeter:

Pipeline layout direction, flow direction, upstream and downstream pipeline length. pipeline diameter, maintenance space, pipeline vibration. grounding, power supply, auxiliary equipment (filtration, sewage), explosion protection, etc.;

Environmental conditions for natural gas flow meters:

Environmental temperature, humidity, safety, electromagnetic interference, etc.;

Economic factors of natural gas flowmeter:

Purchase cost, installation cost, maintenance cost. calibration cost, service life, operating cost (energy consumption), spare parts, etc. Fluid vibration natural gas flowmeter. There are two types of this type of flowmeter, vortex flowmeter and precession (vortex precession) flowmeter.

Users can consider their actual situation when choosing, and analyze specific problems in detail. Choose the right flow meter product to ensure the correct measurement.

Of course, if you still have technical questions when selecting natural gas flow meters, please feel free to contact Sino-Inst sales engineers.

Portable natural gas flow meter

Currently, the Portable Gas flow meter is mainly products such as German FLEXIM and GE TransPort PT878GC. However, the cost of such products is very high.

Therefore, on the basis of cost control, we need to choose a suitable natural gas flow meter.

Although, we do not have a portable gas flow meter. But we have handheld ultrasonic liquid flow meters. Read More.

Natural gas flow meter price

Sino-Inst, as a manufacturer of natural gas flowmeters, under the premise of ensuring product quality, we provide you with competitive prices for natural gas flowmeters.

The following is the reference price of natural gas flowmeter:

Natural gas flow meterPrice
Gas turbine flowmeterUSD 600.00~1200.00
Precession vortex flowmeterUSD 500.00~ 1000.00
Vortex flowmeterUSD 370.00~ 900.00
Gas ultrasonic flowmeterUSD 1600.00~35000.00
Thermal mass flow meterUSD 709.00~ 1500.00
Orifice flowmeterUSD 400.00~ 20000.00
V cone flowmeterUSD 529.00~ 1950.00

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Sino-Inst supplies Natural Gas Flow Meters, like: gas turbine flow meter. vortex flowmeter, thermal mass flow meter, and more.

Sino-Inst’s Natural Gas Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Coke Oven Gas Measurement

What kind of flowmeter is used for coke oven gas measurement? The instability of the medium in the coke oven gas causes measurement problems for the flowmeter. Please keep reading.

Before this, coke oven gas can be measured with a V cone flowmeter. Today, we compare the characteristics and economic analysis of gas ultrasonic flow meters, thermal flow meters, and target flow meters. Let’s take a look at the application of these flow meters in coke oven gas measurement.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

What is coke oven gas?

Coke oven gas is an important product and consumable of metallurgical enterprises. Coke oven gas has high calorific value and is widely used in the heating process of steelmaking, steel rolling, power generation and other production. Its consumption directly reflects the assessment of energy consumption of each unit The completion of indicators.

Therefore, coke oven gas flow measurement has always been the focus of energy measurement.

However, coke oven gas itself has a low flow rate, a low density, and contains impurities such as tar, water, industrial naphthalene, ammonia, and sulfides. Therefore, the flow measurement of coke oven gas is a difficulty in energy measurement.

Featured Flow Meters for Coke Oven Gas Measurement

Coke oven gas measurement challenges

  1. The dirt of coke oven gas is blocked.
  2. The instability of the working conditions of the coke oven gas fluid itself.
  3. Coke oven gas is highly corrosive, causing serious damage to valves and lax closure. Small and low flow gas flows unimpeded in the pipeline, affecting the data balance of the entire system.
  4. Once the coke oven is in production, it is difficult to stop production, resulting in inconvenient installation and disassembly.

Extended reading: Gas Mass Flow Meter

Case: Analysis of Lu’an Group Coke Oven Gas Metering Point

The coke oven metering points are mainly concentrated on the outlet of the fan, the return gas pipeline, the inlet and outlet of the gas tank, and the external gas supply pipeline.

The above-mentioned pipelines have been used for a long time, and there is dust accumulation in the pipelines, especially the dust accumulation in the outlet of the fan and the return furnace pipeline.

Moreover, the flow rate at the above-mentioned metering point is relatively low, and the pressure is relatively low. The gas contains tar and naphthalene. The composition changes due to different coal blending ratios, and also changes with the condensation of water vapor in the pipeline.

Therefore, the requirements for measuring instruments at the measuring point are as follows;

  1. Measuring instruments are required to be not affected by gas composition (density)
  2. The measuring instrument can adapt to the measuring characteristics of low flow rate and low pressure of coke oven gas
  3. Dirt resistant, and the measurement is not affected by tar and naphthalene in the gas
  4. In the measurement process, the measurement instrument can remove the influence of pipe dust on the measurement
  5. It can be constructed online and installed without stopping the air.

Extended reading: Buy Digital Gas Flow Meters & Controllers For Air-O2-N2-CO2

Comparison of characteristics of ultrasonic flowmeter, smart target flowmeter and thermal flowmeter

NameUltrasoundTargetThermal
Turndown ratio1:1001:101:10
Dirty influencenoBigBig
Composition influencenoBigBig
Installation concentricity requirementsgeneralhighhigh
Pipeline fouling effectgeneralBigBig
Highest measurement accuracy±0.15%±0.2%±0.5%
Repeatabilityit is goodgeneralgeneral
Temperature and pressure compensationHaveHaveHave
Storing datacancancan
Requirements for front and rear straight pipes10D before, 5D after10D before 5D5D before, 3D after
Trade measurementcanGenerally not donecan
Pressure lossnoLargersmall
Movable partsnonono
Can measure pulsating flowcanCan’tCan’t
Two-way meteringcancanCan’t
Eddy current influenceno effectinfluentialinfluential
Flow velocity distribution influenceno effectinfluentialinfluential
One-time input pricehighlowlow
Online repaircancancan
Service lifeMore than 10 years6 years6 years
Daily maintenance feelowhighhigh
Does maintenance need to stop gasNot neededNot neededNot needed

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Analysis of media characteristics of on-site metering points

1.The impact of dirt.

Coke oven gas contains impurities such as tar and naphthalene. These impurities will adhere to the pipes and also to the measuring instruments.

Impurities adhere to the probe of the ultrasonic flowmeter. It does not affect the measurement accuracy. It only reduces the intensity of the ultrasonic wave. According to the experience of using the ultrasonic flowmeter, the ultrasonic probe can still work normally if it is adhered with 1cm thick tar. Therefore, the ultrasonic probe is pulled out and cleaned regularly (usually three months) to ensure the normal operation of the ultrasonic flowmeter.

The adhesion of tar and naphthalene to the temperature measurement element of the thermal flowmeter will directly cause the temperature measurement data to be distorted. Therefore, the measurement performance is an abnormal increase in the flow rate data. The solution is to clean regularly, but the adhesion process is a gradual process, so the data of the flowmeter is gradually increasing.

Tar and naphthalene adhere to the target plate of the target flowmeter. It will cause the indication value to increase abnormally. The solution is to clean it regularly. However, the adhesion process is a gradual process, and the data of the flowmeter is constantly increasing.

From the comparison of the three, only the ultrasonic flowmeter is not affected by the pollution of coke oven gas.

2.Composition influence.

The composition of coke oven gas is not a fixed value. The gas composition changes with the coal blending ratio. At the same time, the content of water vapor in the gas is also not a fixed value. It also changes with the outside temperature and the temperature in the pipeline.

The ultrasonic flowmeter directly measures the flow rate of the gas, and the measurement and calculation formula have nothing to do with the gas composition.

The target flowmeter is a differential pressure flowmeter. The measurement and calculation formulas have a great relationship with the gas composition, and the measurement is affected by the gas composition.

Thermal flow meters are mass flow meters, and the measurement and calculation formulas have a great relationship with the gas composition, and the measurement is affected by the gas composition.

And, Industrial Gas Measurement with Digital Gas Mass Flow Meters

3.Requirements for installation concentricity

Because the flowmeter is installed online, the on-site installation methods and methods put high demands on measuring instruments.

The most important thing in the installation of ultrasonic flowmeter is the centering of the probe, which is installed on the valve stub at the site. The flowmeter has an adjustment screw that can be fine-tuned. Ensure that the site installation is completely centered. At the same time, the ultrasonic flowmeter only needs to be installed on the central axis. There is no need to consider the influence of the dust at the bottom of the pipeline on the central axis of the pipeline.

Due to the product structure and working principle of the target flowmeter, the target plate needs to be installed on the center of the pipe cross-sectional area. Due to the dust accumulation at the bottom of the pipeline, concentric installation in the pipeline is extremely difficult. Therefore, the target flowmeter is not suitable for installation on the pipeline with dust accumulation at the bottom of the pipeline.

Thermal flow meters need to be installed on the center of the pipe cross-sectional area due to the product structure and working principle. Due to the dust accumulation at the bottom of the pipeline, concentric installation in the pipeline is extremely difficult. Therefore, thermal flow meters are not suitable for installation on pipes with dust at the bottom of the pipe.

4.The influence of dust accumulation in pipelines

Sino-Inst has been installing ultrasonic flowmeters on site for a long time. It has accumulated a complete set of calculation methods and measurement methods for the cross-sectional area of ​​pipe dust. The influence of pipe dust on measurement can be reduced to a minimum. It can effectively avoid pipe dust on gas ultrasonic flow.

Extended reading: V-Cone Flow Meter Applications

Use cost and economic benefit analysis

1.One-time investment

Because it is a transformation project, the characteristics of the wide range ratio of the gas ultrasonic flowmeter cannot be brought into play. In terms of one-time investment, the gas ultrasonic flowmeter is higher than the target flowmeter and the thermal flowmeter.

2.Long-term operating costs

Due to the long-term operation of the flowmeter, there are costs in the following aspects: equipment maintenance costs, calibration costs, replacement parts costs, and operator labor costs.

(1) Equipment maintenance fee
Because the ultrasonic flowmeter is a maintenance-free instrument. The routine maintenance work is only to clean the probe regularly. The maintenance difficulty and frequency of thermal and target flowmeters are greater than that of ultrasonic flowmeters, which require frequent maintenance. Therefore, the maintenance cost of the latter is huge Higher than the former.

(2) Daily maintenance
Because the target plate is deformed and stuck during use, the target plate needs to be replaced frequently, and the target plate needs to be replaced frequently, and the cost is increased. Ultrasonic flowmeter does not require replacement parts. The probe can be replaced and replaced under pressure. Clean, other parts don’t need to be replaced basically.

(3) Pumping costs
Due to the low pressure of coke oven gas, the low flow rate. The target plate of the target flowmeter is required to be large, and the pressure loss of the flowmeter is large, which increases the load of the compressor. After years of practice, it has been proved that the operating cost increases with the increase of pressure loss. Pumping costs are also a considerable expense.

(4) Labor costs
Operator labor costs. The daily maintenance of the target flowmeter is relatively high, and the labor cost is a lot. The ultrasonic flowmeter is unattended and basically does not need maintenance. Therefore, the cost of operation and maintenance for the ultrasonic flowmeter will be much lower than that of the target flowmeter.

3.Management benefits

Due to the measurement characteristics of the gas ultrasonic flowmeter, it can maintain good measurement accuracy and stability in the medium of coke oven gas for a long time. Therefore, it can provide a basis for the daily production management and scheduling of coke ovens in coking enterprises. Improve the level of comprehensive gas utilization , Reduce gas emissions and combustion. It can greatly help enterprises in energy saving and emission reduction. Significantly improve overall benefits.

Especially in the existing coke oven gas to natural gas project. Accurate measurement can effectively improve the management level of the enterprise. Improve the comprehensive use efficiency of coke oven gas, reduce costs and increase efficiency.

Remarks:

  1. Jiangsu Shagang Group lists gas ultrasonic flowmeters as the only selection instrument for gas measurement. More than 50 sets of gas ultrasonic flowmeters are used on coal gas. Energy management has been implemented for coke oven gas, converter gas and blast furnace gas since 2013 Since then, it has not only improved the comprehensive utilization efficiency of coal gas, but also increased the production efficiency of coke ovens. The annual gas emission rate control has also been effectively controlled, and the annual direct economic benefit is more than 40 million yuan.
  2. Shandong Weijiao Xuecheng New Energy is also in its coke oven gas to natural gas project. The gas ultrasonic flowmeter is included in the design selection as the only measuring instrument for coke oven gas.

To sum up, although the gas ultrasonic flowmeter has a large one-time investment, the long-term operating cost is low, and the management benefits are far greater than the equipment investment.

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Sino-Inst is Flow Meters suppliers, located in China. Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Magnetic Flow Meters respectively.