Yearly Archives: 2022

Underwater Pressure Transducer|IP68-for Underwater Pressure or Level Measurement

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What is underwater pressure transducer?

Underwater pressure transducer refers to a type of pressure sensor that can be used underwater for a long time. The degree of protection of the underwater pressure sensor is IP68. For underwater installation, it is constructed to prevent water from entering sensitive components and damaging the sensor. The shell adopts all stainless steel structure, which has good moisture resistance and excellent media compatibility. The connecting cable emerges with a unique triple seal structure. Unique sealing performance and high sealing reliability.

RFQ Level Sensors
Underwater Pressure Transducer

underwater pressure sensor

Underwater pressure transducer is also called underwater pressure sensor. It adopts stainless steel integral components, elastomer components, high-precision strain process, high-reliability amplifying circuit and precise temperature compensation. It has stable performance, good EMC electromagnetic compatibility and impact resistance.

GB 304 stainless steel seal welding. The structure is small and compact. It has good moisture resistance and excellent media compatibility.

Adopt waterproof device, reach IP68 waterproof level.

Extended Reading: Wireless Water Meter

submersible pressure transducer

Submersible pressure transducer with 4-20ma is a conventional liquid level measurement sensor. Such as water cans. Cable 0m ～ 300m, minimum range 0.5m.

Submersible pressure transducer with 4-20mA output is Hydrostatic Level Sensor for level measurement. Submersible pressure transducer is based on the measured liquid static pressure proportional to the height of the liquid Principle. Convert static pressure into electrical signal. After temperature compensation and linear correction. Convert into standard electrical signal. Generally 4 ～ 20mA / 1 ～ 5VDC. It can also be called “static pressure liquid level gauge, liquid level transmission Device, liquid level sensor, water level sensor “. Bullet, cage, and flush tip models are available. Applications include pumps, downhole, oil tanks, lime slurry, and water tanks. There is a miniature submersible transmitter that is low power voltage.

ocean/Well water depth sensor

Deep Well water level sensor is to apply Hydrostatic Level Sensor to deep well. Well water level sensor submerged in deep well work together with submersible water pump. Range within 300m ～ 1000m.

Deep Wells Water level sensor is based on the principle that the measured liquid pressure is proportional to the height of the liquid. The piezoresistive effect of the advanced foreign isolated silicon diffused sensor is used. Change to electrical signal. After temperature compensation and linear correction, convert to 4-20mA standard electrical signal. Well water level sensor submerged in deep well work together with water pump. It is extremely difficult to replace and submit an inspection. Therefore, it adopts stainless steel cable, waterproof, sealing ring, and other four-level seals. Special cables and special water sealing technology make the transmitter highly reliable and stable.

For ocean – sea water level measurement, Anti-corrosion materials are recommended. such as tetrafluoroethylene.

Submersible Level Transmitter is made of Anti-corrosive all-tetrafluoroethylene(PTFE) material. It has high temperature resistance, corrosion resistance and anti-clogging.

Submersible level transmitter made of PTFE is perfect in the harshest applications. Like Acid and alkali environment, Sludge and Slurries. Anti-corrosive Submersible Level Transmitter utilizes the linear change law of liquid height, density and pressure. It converts the change of liquid level into linear 4-20mADC standard signal output. Integrate temperature compensation calibration technology. Easy installation. Anti-corrosive Submersible Level Transmitter adopts two-wire system. 4 ～ 20mA output. 24V DC power supply. ATEX, 3 wire, remote mount transmitter optional.

Extended reading: how to calibrate a pressure transmitter

IP68-waterproof pressure sensor

We are all familiar with knowing that to purchase pressure transmitters for underwater use, IP68 needs to be met.

Sino-Inst provides a variety of waterproof pressure sensors that meet IP65-IP67-IP68.

So, what is the IP protection level of the liquid level sensor?

Introduction to Protection Levels

IP is the abbreviation of Ingress Protection. The IP rating is the degree of protection for the enclosure of electrical equipment against the intrusion of foreign objects.

The source is the standard IEC 60529 of the International Electrotechnical Commission.

This standard was also adopted as an American National Standard in 2004.

In this standard, the protection of electrical equipment enclosures against foreign objects.

The format of IP rating is IPXX, where XX is two Arabic numerals.

The first marked number indicates the contact protection and foreign object protection level. The second marked number indicates the waterproof protection level.

IP is the international code used to identify the protection level. The IP level is composed of two numbers. The first number means dustproof. The second number means waterproof. The larger the number, the better the group leader of protection.

In the protection level of the liquid level sensor, the protection level IP68 is the highest level of the waterproof level standard of the connector.

To evaluate the waterproof performance of the waterproof connector, it mainly depends on the two digits XX after the IPXX. The first X is from 0 to 6, and the highest level is 6. The second X is from 0 to 8, the highest level is 8;

Extended Reading: Resistive Pressure Transducer

analog water pressure sensor

Analog signal refers to information represented by a continuously changing physical quantity. The amplitude, or frequency, or phase of the signal changes continuously with time. In engineering, the output analog signal is generally 4-20mA or 1-5V electrical signal.

An analog signal is one in which the information parameters appear as continuous signals within a given range. Or in a continuous time interval. The characteristic quantity of its representative information can be presented as a signal of any value at any instant.

Analog Water Pressure Sensor means that the sensor that measures water pressure can output 4-20mA or 1-5V electrical signal.

Extended reading: How to convert a 4-20mA to 0-10V /1-5V signal?

The water pressure transducer is the most commonly used pressure transmitter in the field of industrial automation. It is widely used in pressure measurement and control of water supply equipment, building water supply system, residents, workshops, water conservancy, chemical industry, medical treatment, electric power, air conditioning, diamond press, metallurgy, vehicle braking, etc. The water pressure transmitter will have an immeasurable role in the future automation industry.

The core of the water pressure transmitter is usually made of diffused silicon. The working principle is that the pressure of the measured water pressure acts directly on the diaphragm of the sensor. Make the diaphragm produce a micro-displacement proportional to the water pressure. Change the resistance value of the sensor. and detect this change electronically. And convert and output a standard measurement signal corresponding to the pressure.

You can use a water pressure gauge to connect to the water pipe to measure. Ordinary oil pressure gauges can also be used temporarily, but pay attention to the range. The pressure is generally below 3MPa, which can be roughly estimated in this way.

Extended Reading: 3 inch (3″) Water Flow Meter

psi is an imperial unit of pressure. INH2O is the input mm water column. Units can be interchanged.

1 Inches of water = 0.0361 Pounds per square inch10 Inches of water = 0.3613 Pounds per square inch2500 Inches of water = 90.3157 Pounds per square inch
2 Inches of water = 0.0723 Pounds per square inch20 Inches of water = 0.7225 Pounds per square inch5000 Inches of water = 180.63 Pounds per square inch
3 Inches of water = 0.1084 Pounds per square inch30 Inches of water = 1.0838 Pounds per square inch10000 Inches of water = 361.26 Pounds per square inch
4 Inches of water = 0.1445 Pounds per square inch40 Inches of water = 1.4451 Pounds per square inch25000 Inches of water = 903.16 Pounds per square inch
5 Inches of water = 0.1806 Pounds per square inch50 Inches of water = 1.8063 Pounds per square inch50000 Inches of water = 1806.31 Pounds per square inch
6 inches of water = 0.2168 Pounds per square inch100 Inches of water = 3.6126 Pounds per square inch100000 Inches of water = 3612.63 Pounds per square inch
7 Inches of water = 0.2529 Pounds per square inch250 Inches of water = 9.0316 Pounds per square inch250000 Inches of water = 9031.57 Pounds per square inch
8 Inches of water = 0.289 Pounds per square inch500 Inches of water = 18.0631 Pounds per square inch500000 Inches of water = 18063.14 Pounds per square inch
9 Inches of water = 0.3251 Pounds per square inch1000 Inches of water = 36.1263 Pounds per square inch1000000 Inches of water = 36126.28 Pounds per square inch

convertlive

Wireless Water Level Sensor

The Wireless Level Sensor upgrades the LoRa wireless transmission function based on the Hydrostatic Level transmitter. Measure water or oil level. This product adopts the LORA debugging method, which can greatly increase the communication distance. It can be widely used in the field of short-distance Internet of Things wireless communication in various occasions.

Related Products

SI-151 Hydrostatic Level Sensor
SI-10 Liquid pressure sensor
SI-PCM261 Submersible Pressure Transducer
SMT3151TR Submersible Level Transmitter
SI-PCM260 Deep Well Water Level Sensor
SI-703 Flush diaphragm pressure sensor
SI-302 Anti-corrosive Submersible Level Transmitter
ULT-100A Ultrasonic Level Transducer
ULT-200 Ultrasonic Level Detector
ULT-200A Ultrasonic fuel tank level sensor
ULT-100 Ultrasonic Level Indicator
Portable Ultrasonic Liquid Level Indicator

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Frequently Asked Questions

Contact Us

Underwater pressure sensors are also called Submersible pressure transducers, or Submersible level transmitters.

Underwater pressure sensors are composed of a pressure sensor, a signal amplifier and a conversion circuit, which can be directly put into the water.

A silicon semiconductor pressure sensitive element is used as the detection element. A pressure sensitive element placed in the fluid interacts with the pressure in the depth of the fluid. Using the piezoresistive effect of silicon material, there will be an electrical signal output. So as to offset the impact of changes in the external atmospheric pressure, to ensure the accuracy of the measurement.

At present, the role of the water pressure sensor is mainly manifested in the following aspects:

  1. Determination of water pressure values in outdoor areas such as rivers, rivers, lakes and seas.
  2. Measurement of the pressure value of the water tank of automobiles and some high-end motorcycles.
  3. In various liquid level measurement sites, it can be used as a liquid level gauge.
  4. In the aerospace field, the water pressure measurement in the spacecraft also applies the water pressure sensor.
  5. Store and display the water pressure information of various fishing grounds. The high-end water pressure sensor can even directly control the water pressure changes in the fishing grounds.

Sino-Inst is a manufacturer of Underwater Pressure Transducers. Sino-Inst provides customers with the best water level measurement price.

Sino-Instrument offers detailed product specifications and data sheets for review. Our application engineers, can help ensure you choose exactly what you need for your specific installation. Or if you need the RFQ instantly, we can offer you with the submersible level transmitter price immediately.

Sino-Inst offers over 50 Underwater Pressure Transducers at best price.

About 50% of these are Submersible Pressure Transducer, 40% are Differential Pressure Gauge, and 40% are Diaphragm Seal Pressure transmitters.
A wide variety of Underwater Pressure Transducer options are available to you, such as free samples, paid samples. 

Sino-Inst is a globally recognized supplier and manufacturer of Underwater Pressure Transducer, located in China. Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Underwater Pressure Transducer 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.

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

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Clamp on Water Flow Meter

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What is Clamp on Water Flow Meter?

Clamp on Water Flow Meter is also known as the clamp-on ultrasonic flowmeter. Using an ultrasonic flowmeter to measure water flow rate is a great choice.

Clamp on Water Flow Meter measures liquid flow meters with full pipes. Measurable medium: drinking water, river water, sea water, groundwater cooling water, high temperature water, sewage, lubricating oil, diesel oil, fuel oil, chemical liquid and other homogeneous fluids.

Clamp on Water Flow Meter can choose portable host, or wall-mounted host. Non-contact measurement without cutting the line.

RFQ Flow Meter

Why Choose Clamp on Water Flow Meter?

Clamp on Water Flow Meter will be the first choice for many customers to measure water flow. Mainly based on the following points:

  • With a powerful magnet, when measuring steel pipes and cast iron pipes, just attach the sensor to the outer wall of the pipe.
  • Equipped with a grounding terminal, it can be used in situations with strong electromagnetic interference.
  • It can be fixed by steel belt, steel wire rope, tension belt and special fixture.
  • The upper cover of the sensor marks the emission direction of the ultrasonic signal.
  • After the junction box is filled with glue, the protection level can reach IP68.
  • Complete specifications, divided into three types: large, medium and small, measuring pipe diameter range: DN15~DN6000mm, temperature range: -40~90℃.
  • According to different uses, standard clip-on sensors are divided into two categories: portable and fixed.
  • For large diameter pipe measurements, the Clamp on Water Flow Meter is easy to install. And compared to other water flow meters, the cost is reduced.

Extended Reading: 3 inch (3″) Water Meter

Technical Parameters of Clamp on Water Flow Meter

Item Performance and Parameter
Convertor Principle transit-time ultrasonic flowmeter
Accuracy

Flow: over 1%-2%(battery-powered supply over ±2% )，Heat: over ±2%，Repeatability: over 0.2%
Display

2×20 character LCD with backlight, support the language of Chinese, English and Italy Convertor dimension:170*180*56cm
Operation Support 16 key light touch keyboard and the Simulation keyboard software
Signal Output

1 way 4~ 20mA output, electric resistance 0~ 1K，accuracy0. 1%

1 way OCT pulse output ( Pulse width 6 ~ 1 0 0 0 ms，default is 2 0 0 ms)
1 way Relay output
Signal Input

3 way 4~ 20mA input, accuracy 0. 1%，acquisition signal such as temperature, press and liquid level

Connect the temperature transducer Pt100, can finish the heat/energy measurement
Data interface

Insulate RS485 serial interface, upgrade the flow meter software by computer, support the MODBUS, METER-BUS etc.
Other Function Automatically remember the previous flow/energy data of 512 days,  128 months and 10 years
Automatically remember the previous flow/energy data of 512 days working condition and check it
Automatically remember the previous 32 times power on/off time and flow rate
Special Cable

Twisted-pair cable, generally, the length under 50 meters; Select the RS485 communication. The transmission distance can over 1000m.
Pipe Installation Condition Pipe Material

Steel, Stainless steel, Cast iron, Copper, Cement pipe, PVC, Aluminum, Glass steel product, liner is allowed.
Pipe Diameter 15mm—6000mm
Straight length pipe

Transducer installation should be satisfied: upstream10D, downstream 5D, 30D from the pump.
Measuring Medium Type of Liquid

Water (hot water, chilled water, city water, sea water, waste water, etc.);  Sewage with small particle content; Oil (crude oil, lubricating oil, diesel oil, fuel oil, etc.);  Chemicals (alcohol, acids, etc.); Plant effluent; Beverage, liquid food;  Ultra-pure liquids; Solvents and other liquids

More about: Sewage Flow Meter Selection
Temperature

Standard Transducer: -30–90℃; High-temperature transducer: -40–160℃
Turbidity No more than 10000ppm and less bubble
Flow rate 0–±12 m/s
Working Environment Temperature Main Unit: -20–60℃
Flow transducer: -40–160℃; 
Temperature transducer: according to the customer’s demands.
Humidity

Main Unit: 85% RH; Flow Transducer: Ip67
Power Supply DC  24V or AC  85-264V
Power Consumption 1.5W

Read more about: Top Flow Meters For PVC Pipes

Extended reading: Typical Applications of Handheld Ultrasonic Flow Meter

Working Principle of Ultrasonic Clamp on Water Flow Meter

Clamp on Ultrasonic Flow Meter adopts the measurement principle of time difference method. It uses the ultrasonic wave emitted by the sensor to propagate in the flowing fluid. The sound wave propagation speed in the downstream direction will increase, and the backward direction will decrease. In the same propagation distance, there will be different transmission times. According to the difference between the transmission time and the measured The relationship between fluid velocity measures the fluid velocity.

The flow rate of the fluid is different in different positions in the tube. The flow rate in the center of the tube is faster than the flow rate near the wall of the tube. The flow velocity distribution of the fluid in the pipeline can be represented by the flow velocity cross-sectional distribution diagram.

By setting the flowmeter and considering the cross-sectional distribution of the flow velocity, the average flow velocity can be calculated. Then the volume flow of the fluid can be obtained according to the cross-sectional area of the pipe.

Notes:
V measure fluid velocity
M ultrasonic reflection times
D pipe diameter
θ The angle between the ultrasonic signal and the fluid
T up The time when the downstream sensor transmits the signal to the upstream
T down Time from upstream sensor to downstream
ΔT = T up – T down

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

Recently, our company received a call from a customer asking about an ultrasonic flowmeter for measuring sewage flow.

After communication, it was learned that the customer installed flow meters for many sewage pumping stations. Some on-site installations were pipeline-type electromagnetic flowmeters. Some installed plug-in flowmeters.

The pipeline-type flowmeter was first installed on this site. Later, an insertion-type flowmeter was installed. It was broken and could not be measured normally.

However, the water cannot be stopped at present, and the pipeline-type flowmeter should be reinstalled.

Therefore, the customer came to Sino-Inst and ordered an ultrasonic flowmeter that can be installed on the outer wall of the pipeline to measure the flow. After the construction period allows, it will be replaced with a pipeline-type sewage flowmeter.

Extended reading: Portable ultrasonic flow meter for water

In the production of electricity, the amount of demineralized water in power plants is quite large, and how to measure the demineralized water effectively has always been a headache.

According to the traditional flowmeter selection method, orifice flowmeter or turbine flowmeter is generally used.

Some people will ask: Why not use an electromagnetic flowmeter?

Here we need to popularize a common sense about the use of electromagnetic flowmeters. Since the working principle of electromagnetic flowmeters is based on Faraday’s law of electromagnetic induction. When a conductive liquid moves in a magnetic field to cut magnetic lines of force, an induced potential is generated in the conductor. The flow of fluid in .

It is very important to note that the measuring medium must be a conductive liquid. This is the basic requirement for the electromagnetic flowmeter to work properly.

Although the electromagnetic flowmeter has high precision and stable operation, there is no problem in measuring general media, such as sewage, ionized water, acid-base salt and other solutions.

However, because the demineralized water in the power plant has low ion content and low electrical conductivity, its electrical conductivity cannot meet the measurement requirements. Therefore, the electromagnetic flowmeter cannot measure the flow of demineralized water.

Orifice flowmeters and turbine flowmeters are traditional flowmeter types. Because the measuring components need to be in direct contact with the measuring medium. There are also various defects such as blockage, poor accuracy, and troublesome installation. Its effect is also not ideal.

On site visits, we found that there are many disadvantages when using this type of flowmeter.

There are also customers who are consulting our technical department, mentioning that they have used metal rotameters, and there is no problem in measurement. Because it is desalinated by centrifugal pumps, they are often stuck by debris. Also, the pump is frequently started and stopped, and the rotor is often blocked. Broken. Ask if there are more measuring instruments and methods.

In view of this common situation. According to our experience, we recommend that you choose the outer clamp ultrasonic flowmeter, which is very effective to measure the flow rate of demineralized water.

  1. This is the obvious difference between the external clip-on ultrasonic flowmeter and the electromagnetic flowmeter. The external clip-on ultrasonic flowmeter is not affected by the conductivity of the fluid, and can accurately measure pure water with low conductivity or low conductivity that cannot be measured by the electromagnetic flowmeter. other fluids.
  2. The accuracy of the clip-on ultrasonic flowmeter fully meets the measurement requirements, and its accuracy is usually ±1%, and ±0.5% after correction.
  3. Because its measuring probe is outside the pipe wall, it is closely connected with the pipe wall through a couplant, and does not directly contact the measured medium, and there is no blocking part, and its operating life can be very long. Good guarantee. 
  4. Strong anti-interference ability, wide range of power supply, to meet the needs of the scene.
  5. The installation of the outer clamp ultrasonic flowmeter is also very convenient, as long as the outer clamp sensor is installed on the outer pipe to avoid cutting off the pipe and contaminating the demineralized water.

The clamp-on ultrasonic flowmeter is an excellent flow measurement product. Ideal for flow measurement of pipe materials such as PVC, cast steel and stainless steel.

It is not only suitable for measuring low-conductivity demineralized water or pure water that cannot be used by electromagnetic flowmeters and other products. It is also suitable for various other types of fluid media.

The accuracy of ultrasonic flowmeter in measuring liquid flow is almost not affected by the temperature, pressure, viscosity, density and other parameters of the measured fluid.

It solves the flow measurement problems of strong corrosive, non-conductive, radioactive and flammable and explosive media that are difficult to measure by other types of instruments.

Extended reading: Ultrasonic Water Meter Working Principle

For liquids with low dielectric constant, the flowmeter measuring instruments that can be used include electromagnetic flowmeters, turbine flowmeters and other products.

However, in the pharmaceutical, food and other industries, the quality of water is very high. It is often encountered that pure or ultrapure water needs to measure the flow.

What kind of flowmeter is the most suitable for pure water and ultrapure water?

We know that pure water and ultrapure water is a source of high quality water.

The filter cartridges of the ultra-clean filter units for the production of pure and ultra-pure water are made of pure polypropylene. Activated carbon is used to remove inorganic and organic trace contamination of ion exchange resins (nuclear grade) and adsorber resins. Dedicated ion exchange resins (nuclear grade) remove inorganic ions.

Dissolved organic matter is removed by adsorber resin, and the pore size of the sterile filter is 0.2 μm.

The conductivity of pure water and ultrapure water obtained by such purification equipment: 0.055 μS/cm. Bacterial content: 1 CFU/ml. It is generally used in fields with high requirements such as biopharmaceuticals.

Before choosing which flow rate, let’s first compare the application conditions of various flow meters.

  1. Electromagnetic flowmeter. Since the conductivity of pure water is only 0.055 μS/cm. Much lower than 5 μS/cm, so electromagnetic flowmeters can only be ruled out.
  2. Turbine flowmeter. Turbine flowmeters are contact measurements, and pure and ultrapure water are particularly demanding on materials. Therefore, the main material must be 316L during manufacture. Use hygienic clamp fittings. Production costs immediately increased considerably.
  3. Vortex flowmeter, orifice flowmeter, etc. are all contact measurement. will undoubtedly come into direct contact with the fluid. resulting in different levels of pollution. So neither is the best choice.

So, which flowmeter to choose is the most suitable for the ultrapure water device of the pure water system?

There is no doubt that the flow measurement instrument we need has the following points:

  1. The measuring components should not be in direct contact with the measuring medium. Make sure that the liquid to be tested cannot be contaminated in any way.
  2. The measuring instrument must not be affected by the dielectric constant of the measured liquid.
  3. The installation and measurement data of the measuring instrument should not be affected by the size of the measured pipe diameter.

According to the above requirements, Clamp on Water Flow Meter is undoubtedly the best representative for measuring such liquids.

Clamp on Water Flow Meter is a non-contact meter, which can measure the flow of medium with large diameter and can also be used for the measurement of medium that is difficult to touch and observe.

So far, we believe that the Clamp on Water Flow Meter is the best choice for measuring the flow of ultrapure water system purified water equipment.

Extended Reading: LORA water meter

Recently, a customer called and said that he wanted to measure the flow output of circulating water. The diameter of the pipe is also not sure what it is. Very vague consultation. Said to use a Doppler flowmeter.

Our technical engineer said if the measurement is circulating cooling water. Cannot be measured with a Doppler flowmeter. It is only used in rivers and channels. Doppler measurement principle: double-beam acoustic Doppler profile flow measurement technology to measure.

At present, it is recommended that he use an external clamp-type flowmeter, and the principle of measurement is the time difference method.

Technical parameters of dual-beam acoustic Doppler profile flow measurement technology:

  1. Measurement principle: dual-beam acoustic Doppler profile current measurement technology;
  2. Flow velocity measurement range: ±0.01m/s—±5m/s, maximum ±20m/s;
  3. Flow velocity measurement accuracy: ±1%, ±5mm/s;
  4. Maximum profile distance: 120m;
  5. Transducer wave velocity angle: 1.5°±0.2°;
  6. The maximum number of layers in the unit: 128 layers, and the flow velocity of the layered profile can be displayed;
  7. Layer thickness range: 0.5-4m;
  8. Water level measurement range: 0.1-20m;
  9. Water level measurement accuracy: 0.5%, ±5mm;
  10. Communication interface: RS232, RS422, MODBUS interface;
  11. The instrument directly outputs data: average flow rate, water level, real-time flow, cumulative flow; the instrument directly outputs data without any external transfer calculation module to prevent tampering with the original data.
  12. Alarm output function: can output low water level alarm, instrument tilt alarm function;
  13. Built-in storage: It can store the flow rate data for more than one year, and has the function of re-issuing data over time to meet the needs of the central platform to retrieve flow data in real time.
  14. Protection level: IPX8 and IP6X are required

After comparison, the customer found that the principle of the time difference method of using the clamp-on flowmeter was indeed suitable for him. He said he was very satisfied with the advice we gave.

We are a professional technical manufacturer of ultrasonic flowmeters, if you need it, welcome to consult!

The clamp-on ultrasonic flowmeter does not need to disconnect the pipeline and stop production during installation, which brings great convenience to the majority of users and is deeply loved by the majority of users.

But in general, it is only suitable for pipes of a single material. Such as carbon steel pipes, stainless steel pipes, PVC pipes. Measurements are not possible on lined pipes or pipes with cladding material.

However, some special pipelines can also be treated with methods to facilitate the use of clamp-on ultrasonic flowmeters.

A customer wants to measure the flow of tap water. But the pipes are galvanized pipes. Our technical engineers give the following solutions:

  1. Connect the instrument cable first. Input the pipeline parameters after power-on, and calculate the installation distance of the probe;
  2. Use a polisher to polish off the galvanized layer of the probe installation point on the pipeline. Until the carbon steel layer inside the pipe is exposed;
  3. Apply the fine mixture and bind the upstream and downstream probes according to the conventional method;
  4. Check the working status of the instrument until it works normally.

In this way, Clamp on Water Flow Meter can work well.

Strap on flow meter X3 is very unique in its structural design. It uses circular magnetic steel to realize automatic engagement during installation. It only takes 2-3 minutes to complete from installation to measurement. It also uses the current popular OLED display, It can be easily read even in insufficient environments.

Strap on flow meter X3 is widely used in flow measurement and monitoring in the production process. The application of the product continuously effectively and accurately controls the flow of the fluid, while improving the yield of the product. It even saves the investment of personnel and brings benefits to the production enterprise.

Strap on flow meter X3 can meet the needs of different pipe materials: stainless steel pipe, carbon steel pipe, copper pipe, plastic pipe (PVC, PPR, PPH, HDPE), etc.

Strap on flow meter X3 almost meets the measurement of different clean fluids: various acids, alcohols, chemical solvents, alcohol, drinking water, Coca-Cola water… etc.

MoeldX3-φ6.35X3-φ9.53 X3-φ12.7X3-φ15X3-φ20X3-φ25
Weight(KG)0.910.910.90.90.840.84
MoeldX3-φ32X3-φ40X3-φ50X3-φ63X3-φ75X3-φ99
Weight(KG)0.820.880.981.431.521.95

More Water Flow Meter Types

Water flow meters are flow meters that can diaplay the flow rate of industrial water pipe.

A water flow meter measures the amount of water flowing through a pipe. We have several kinds to choose from, depending on the application, maintenance needs, and budget.

Extended reading: 2 inch Water Flow Meter

There are 4 common water flow meter types:

Turbine (also called mechanical), Vortex, Ultrasonic, and Magnetic. We will tell you everything you need to know about them and help you choose one for your application.

Read more about: Types of Water Flow Meter

Frequently
Asked
Questions

Technical Support

Our clamp-on flow meters’ accuracy is generally 1%. This accuracy has been able to meet most of the measurement needs.

The clamp-on flow meter is a flow meter with an external clamp-on flow sensor. Most flow meters are in-line pipe section mounts. The Clamp-on flow meter is a flow meter that only needs to be clamped on the outside of the pipe to measure the flow rate. This is important for many pipes that cannot be cut and bored.

Clamp-on flow sensors are based on the time difference method. The time difference caused by different propagation velocities during forward and reverse propagation is used to calculate the velocity of the measured fluid.

Clamp-on flow sensors employ two acoustic transmitters (sa and sb) and two acoustic receivers (ra and rb). Two sets of sound waves from the same sound source are transmitted between sa and ra and between sb and rb respectively.

The clamp-on ultrasonic flowmeter is installed along the pipeline at an angle of θ (generally θ=45°).

Due to the sound waves traveling downstream are accelerated by the fluid. The sound waves traveling upstream are delayed. The time difference between the clamp-on ultrasonic flowmeters is proportional to the flow rate.

You can also send a sinusoidal signal to measure the phase shift between two sets of sound waves or send a frequency signal to measure the frequency difference to measure the flow rate.

If the water meter is divided into two categories. You may be referring to velocity water meters and volumetric water meters.

In fact, water meters can be divided into 8 types according to measurement principle, measurement grade, nominal diameter, use, installation direction, temperature, pressure and form.

  1. According to the measurement principle: speed water meter, volumetric water meter.
  2. According to the measurement level: A-level meter, B-level meter, C-level meter, D-level meter. The larger the range, the higher the measurement level.
  3. According to the nominal diameter: large diameter water meter, small diameter water meter.
  4. According to the purpose: civil water meter, industrial water meter.
  5. According to the installation direction: horizontal installation of water meters, vertical installation of water meters.
  6. According to the temperature: cold water meter, hot water meter.
  7. According to the pressure: ordinary water meter, high pressure water meter.
  8. Classification by form: analog type, digital type, analog-digital combined type.

Extended reading: Advantages and disadvantages of ultrasonic water meters

Read more about: How to Measure River Water Level?

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Magnetic Water Flow Meter
Remote Magnetic Sewage Flow Meter
In-Line Ultrasonic Flow Meter
Liquid Turbine Flow Meter
Magnetic Sanitary Flow Meter
Magnetic Large Dia. Pipe Flow Meter
Turbine Sanitary flow meter
Insertion Magnetic Flow Meter
Ultrasonic Clamp on Flow Meter
 Annubar Flow Meter
Handheld Ultrasonic Flow Meter
Rotameter flow meter-Variable Area Flow Meters

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Sino-Inst, Manufacturer for Clamp on Water Flow Meters. It can measure a single sound-conducting liquid medium of DN 15—6000mm. It can measure even liquids such as water, sea water, oil, and slurry.

Sino-Inst’s Clamp on Water 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.

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Kerosene Gasoline/ Kerosene Flow Meter

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A kerosene flow meter is a flow meter that can be used to measure the flow of kerosene. Kerosene is a common oil in industrial production. It is an organic solvent and has no electrical conductivity. Similar to diesel gasoline.

If it is not conductive, it cannot be measured with an electromagnetic flowmeter. Select the appropriate flowmeter according to the size of the flow and the size of the pipeline. From the perspective of medium, it can be measured by liquid turbine flowmeter, vortex flowmeter, oval gear flowmeter, mass flowmeter, orifice flowmeter, and rotameter. Which one is better in practice needs to be selected according to the actual parameters of the site.

RFQ Flowmeters

Kerosene Gasoline

Pure kerosene is colorless and transparent liquid, pale yellow when it contains impurities. Slightly smelly. The boiling range is 180-310°C (not absolute, it needs to be changed according to the specific situation during production). The average molecular weight is between 200-250.

The melting point is above -40℃. The kinematic viscosity at 40℃ is 1.0～2.0mm2/s. Insoluble in water, soluble in alcohol and other organic solvents. volatile. Flammable. After volatilization, it mixes with air to form an explosive gas mixture. Complete combustion, sufficient brightness, stable flame, no black smoke, no lights, no obvious odor, and little environmental pollution.

Kerosene is miscible with petroleum-based solvents. The solubility of water is very small, and the solubility of kerosene containing aromatic hydrocarbons in water is greater than that of aliphatic hydrocarbon kerosene. Kerosene can dissolve anhydrous ethanol. Mixtures with alcohols separate at low temperatures in the presence of water.

Different uses of kerosene have different chemical compositions. The same kerosene has different physical and chemical properties due to different preparation methods and origins.

The quality of various kinds of kerosene decreases in turn: power kerosene, solvent kerosene, lamp kerosene, fuel kerosene, and washing kerosene.

Kerosene is a high-boiling hydrocarbon mixture with C11-C17 carbon atoms. The main components are saturated hydrocarbons, and also contain unsaturated hydrocarbons and aromatic hydrocarbons. Due to different varieties, it contains 28-48% alkanes, 20-50% or 8%-15% aromatic hydrocarbons, 1-6% unsaturated hydrocarbons, and 17-44% cyclic hydrocarbons. The number of carbon atoms is 11-16. In addition, there are a small amount of impurities, such as sulfides (thiols), colloids, etc. The sulfur content is 0.04% to 0.10%. Free of benzene, diolefins and cracked fractions.

Mainly used for lighting and fuel for various blowtorches, gas lamps, vaporization furnaces and kerosene furnaces; it can also be used as detergent for mechanical parts, solvent for rubber and pharmaceutical industries, ink thinner, cracking raw material for organic chemicals; glass ceramics Industrial, aluminum plate rolling, chemical heat treatment of metal workpiece surfaces and other process oils; some kerosene is also used to make thermometers. According to the use, it can be divided into power kerosene, lighting kerosene, etc.

Extended reading: Quantitative control with turbine flowmeter

Types of Kerosene Flow Meters

Which flowmeter should I choose to measure kerosene flow? We need to understand the corresponding situation of the measurement conditions first. The type of flowmeter that can be selected for different flow ranges can also be different.

For common measurement sites, trade measurement is generally involved. Our recommendation is to use a liquid waist wheel flowmeter or an oval gear flowmeter. Because volumetric measurement is used, this method measures accuracy. Especially suitable for trade settlement scenarios.

The second is the choice of liquid turbine flowmeter. Turbine flow meters are measured by the rotation of vanes inside the flow. Compared with the volumetric measurement method, the accuracy will be slightly less. But still maintain a stable 0.5 level of accuracy.

The measurement accuracy of other types of flowmeters, such as metal tube rotameter, orifice flowmeter, and vortex flowmeter, is significantly lower than that of the above two types of flowmeters. It is also optional if it is used for process control or internal monitoring.

Extended Reading: Summary Of Crude Oil Flow Measurement Options

Featured Kerosene Gasoline/ Kerosene Flow Meters

Z-Series Straight Tube Micro Motion Coriolis Flow Meter
U-Series Liquid Mass Flow Meter
T-series Triangle Coriolis Mass Flowmeter
Liquid Turbine Flow Meter
Turbine Insertion Flow Meter
Vortex Shedding Flow Meter
Low temperature Turbine Flowmeter-Liquid Nitrogen Flow Meter
Integral DP Flow Meter

 Annubar Flow Meter
Target Flow Meter
Metal Tube Rotameter
Oval Gear-Marine Fuel Flow Meter

oil and gas flow meter

Every day, a large amount of oil and gas are transported back and forth, refined, and then transported, as well as custody transfer. Difficult oil and gas flow measurement challenges such as corrosive media and harsh environments are our daily work. This requires mature and safe technology. Through instrument measurement and display monitoring, safe and reliable operation can be achieved.

Many types of flow meters are used to measure oil and gas flow. Each type has its advantages and disadvantages. The following content discusses these advantages and disadvantages.

Read more about: Flow Meters for Measuring Oil and Gas

Diesel Fuel Flow Meters

Diesel Fuel flow meters are digital flow meters for liquid fuel consumption measurement.

Most widely used types are mechanical and digital inline fuel meters. Differential flow sensors are avilable. Like: the turbine, positive displacement (oval gear), Coriolis, and differential pressure flow meters.

Sino-Inst offers a variety of fuel flow meters for most fuels. Including diesel, bio-diesel, kerosene, gasonline, oil, heating oil, grease and certain chemicals. Sino-Instrument offers diesel fuel flow measurement solutions and free technical support. If you have any question for diesel fuel flow measurement, please contact us.

Read more about:

Frequently
Asked
Questions

Help Center

The oil flow meter measures the volume or mass of oil, which can realize the mutual conversion of volume and mass.
There are many types of oil flow meters. Commonly used are turbine flowmeters and dimensional flowmeters.

Extended Reading: Rotameter vs Flow meter

Oil flow meter refers to a type of flow meter that can measure the volume or mass flow of oil. It can be widely used in flow measurement in petroleum, chemical, medical and health departments.

Extended Reading: Industrial petrol flow meters Types

Flowmeter is a professional automatic measuring instrument. Its main function is to measure the flow of fluid, and the measurement medium includes liquid, gas, steam, mixed slurry, solid dust, etc.

It is the special role of flowmeters, in the field of industrial automation, flowmeters and sensors are called the eyes of the automation system. The measurement results are transmitted to the upper computer system. The data is integrated and analyzed by the system. Then the preset scheme is applied to the upstream and downstream control systems to achieve the purpose of intelligent automatic control.

Extended Reading: Petroleum Flow Meter

Commonly used Fuel flowmeters are: turbine flowmeter, gear flowmeter, DP flowmeter and mass liuliangji

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Sino-Inst’s Kerosene Gasoline/ Kerosene Flow Meter offer reliable and accurate flow measurement in a large range of sizes and pressure rating while being fully compliant with international standards.

Sino-Inst is the risk-free choice for your Kerosene Gasoline flow measurement applications.

Sino-Inst supplies Kerosene Gasoline/ Kerosene Flow Meters, like: turbine flow meter. vortex flowmeter, thermal mass flow meter, and more.

Sino-Inst’s Kerosene Gasoline/ Kerosene 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.

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Wireless Level Sensor – LoRa

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The Wireless Level Sensor upgrades the LoRa wireless transmission function based on the Hydrostatic Level transmitter. Measure water or oil level. This product adopts the LORA debugging method, which can greatly increase the communication distance. It can be widely used in the field of short-distance Internet of Things wireless communication in various occasions.

RFQ More Sensors

Features of Wireless Level Sensor

  • Low power consumption, more than 3 years battery life;
  • -141dBm sensitivity;
  • Long launch distance, up to 10km;
  • Private protocol networking, high security.
  • RS485, Modbus output, compatible with traditional equipment

Specifications of Wireless Level Sensor

Mediumoil, water
TypeAbsolute or gauge pressure
Range0~300m
Precision0.5%FS, up to 0.2%
Output433MHZ
Power supply12~36VDC or battery
Temperature-30~60℃
Storage temperature-40~85℃
Zero drift≤±0.05%FS℃
Full voltage drift≤±0.05%FS℃
Temperature compensation0~70℃
Overvoltage200%FS
Destruction pressure500%FS
Response time≤2ms
Load(Current output)250~1425Ω(Voltage output)≥2KΩ
SealIP68
Long-term stability0.1%FS/Year
Vibrate0.1%FS

Specifications of Wireless parameters

Parameters

Performance

Remark

Operating Voltage

2.4~3.7V

 

Operating temperature

-40~85℃

 

working frequency

410–525MHz

434MHz is recommended, which can be configured in the program

Power consumption

launch status

≤100mA(17dBm)

Maximum transmit power

receive status

≤14mA

434MHz

sleep state

≤2uA

434MHz

19 ± 1dBm

User programmable

 

Modulation

LORA\2-FSK\GFSK\00K

Under LoRa modulation, performance advantages over traditional modulation can be obtained

Communication rate

FSK modulation mode: 1.2~300kbps
00K modulation mode: 1.2~32.768kbps
LoRa modulation mode: 0.2~37.5kbps

User programmable customization, it is recommended to use LoRa modulation method at low rate (<5kbps)

Connect and Install of Wireless Level Sensor – LoRa

LoRa Wireless

LORa is one of the LPWAN (Low Power Wide Area Nerwork) communication technologies. It is an ultra-long-distance wireless transmission scheme based on spread spectrum technology adopted and promoted by Semtech in the United States.

LORa combines digital spread spectrum, digital signal processing and forward error correction coding technology. It has unprecedented performance. Designers can achieve both long distance and low power consumption. Maximize longer distance and lower power consumption The data communication has completely changed the situation in the field of embedded wireless communication.

Wireless Tank Level Sensor

The liquid level transmitter is upgraded by wireless remote transmission. This is an inevitable trend.

The battery-powered Wireless Level Sensor integrates the functions of liquid level acquisition, wireless reporting, and local digital display.

The wireless liquid level transmitter is easy to construct and ready to use. It is mainly suitable for places where power cannot be supplied on site and remote data transmission is required. It can be widely used in liquid level monitoring in urban water supply and drainage, sewage treatment, hydrology and water resources, fire protection, industry and other fields.

From a technical point of view, the Wireless Level Sensors we can currently provide mainly include:

Extended reading: Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank

The wireless remote ultrasonic level gauge can adopt two-wire, three-wire or four-wire technology. The power supply circuit and the signal output circuit are independent.

When using DC 24v power supply, a 3-core cable can be used, and the negative end of the power supply and the negative end of the signal output share a core wire.

When using AC 220v power supply, or when using DC 24v power supply. When the power supply circuit and the signal output circuit are required to be completely isolated, a 4-core cable should be used. DC or AC power supply, with 4~20mADC, high and low switch output.

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

The wireless radar level gauge has the advantages of no blind area, non-contact measurement, and is not affected by the physical characteristics of the measured medium. In recent years, it has been widely used in the field of petroleum and petrochemical.

Smart wireless technology eliminates the need for long-distance wiring in trenches and bridges. Save material, reduce labor costs, and reduce engineering and project execution time.

Smart wireless technology also makes automated user management easier, faster, and less expensive.

Integrating tank level gauges with smart wireless technology can reduce system installation costs by up to 50% by wirelessly connecting storage tank farms and control rooms. And can also reduce implementation time by up to 60%. The budget required to retrofit the automation of the storage tank farm is greatly reduced.

Wireless radar level gauge through Wireless Hart signal to wireless 1420 gateway;
1420 wireless gateway and the seamless integration of the host system;
The host system can be DCS, PLC, HMI.
The communication method between them can be Ethernet, Modbus, OPC.

Extended reading: Corrosive Liquid Chemical Level Sensor in Chemical Processing

chemical tank level sensor

Liquid chemical level sensor is suitable for chemical storage tanks or chemical processing. Especially for highly corrosive liquids.

In chemical storage tanks or chemical processes, there is a risk of corrosive liquids and explosions. Therefore, the requirements for the liquid level indicator are extremely high. SIRD-702 liquid chemical level sensor is a corrosion-resistant guided wave radar level sensor. The maximum range of anti-corrosion guided wave radar level meter can reach 20 meters. It is used to measure the liquid of strong acid and strong alkali. Such as hydrochloric acid, sulfuric acid, hydrofluoric acid, strong alkali and sodium hydroxide. SIRD-702 liquid chemical level sensor adopts all PTFE sealed cable or rod antenna.

Extended reading: Applicaitons Of Magnetostrictive Level Transmitters

Water Level Monitoring System

The Water Level Monitoring System is mainly composed of a telemetry station (Wireless Level Sensor, or wired level transmitter, etc.) and a platform management center.

The telemetry station mainly monitors real-time water level, rainfall, on-site images and other data information in various regions, and uploads it to the platform management center.

The platform management center receives and processes the data sent by the telemetry station through the monitoring and early warning platform, and warns decision makers of decision-making information according to their needs.

At the same time, the system can quickly release relevant early warning information through WEB, mobile terminal, SMS and other means. The Wireless Level Sensor system is a typical IoT system.

Frequently
Asked
Questions

Help Center

There are many kinds of sensors that can measure the water level. Or, it can be said that almost all types of liquid level sensors can be used to measure the water level.

Which sensor is best for water level indicator?

In terms of experience and cost. A hydrostatic water level sensor would be a good choice.

The wireless remote control water level controller is mainly an intelligent instrument designed for long-distance water tower and mountain top pool water level monitoring. It can not only monitor the change of water level, but also automatically control the start and stop of the water pump.

There are generally three parts, namely the water depth sensor, the transmitter and the receiver.

The transmitter is installed in the water tower. The receiver is installed in the control center. When the sensor is put into water, its output voltage is proportional to the water depth. The higher the water level, the higher the output voltage.

under the control of sequential circuits. Its water depth signal is transmitted to the receiver of the control center through the transmitting antenna. The receiver displays the water level data under the control of the program. And according to the set water level upper and lower limit value and water level alarm value, control the opening of the water pump, and send out the over-limit alarm signal in time.

Extended reading: water meter installation details

The water tank level monitoring system is widely used in various landmark buildings to complete the automatic water level display and alarm system of the fire water tank. All that is put into the liquid is a liquid level pressure sensor probe. The circuit part is in the junction box on the other end. It is convenient for users to adjust.

There are two types of installation methods: M20 x 1.5 thread installation and DN50PN0.6MPa (GB9119-88) standard flange installation. The display instrument is placed in the control room to display the water level of the pool in real time.

Extended reading: Float Switch Water Level Controller

Related Products

SI-151 Hydrostatic Level Sensor
SI-10 Liquid pressure sensor
SI-PCM261 Submersible Pressure Transducer
SMT3151TR Submersible Level Transmitter
SI-PCM260 Deep Well Water Level Sensor
SI-302 Anti-corrosive Submersible Level Transmitter
SI-702 High Pressure Sensor
SI-702S Ultra-High Pressure Senors
SI-512H High Temperature Pressure Sensor
SIJC-1000HSM-Silicon Pressure Sensor
SI-706 Combined Pressure and Temperature Sensor-Dual function
SI-338 Ceramic Pressure Sensor

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Sino-Inst offers over 20 Wireless Level Sensors. A wide variety of  Wireless Level Sensors options are available to you. Such as free samples, paid samples. 

Sino-Inst is a globally recognized manufacturer of Wireless Level Sensors, located in China.

Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. 

Wireless Level Sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.

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High Temperature Pressure Transducer with Best Price

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High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter.

The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds the temperature limits of standard pressure transmitters.

By assembling Cooling Elements of different lengths, the temperature of the measured medium can be further improved. Reasonable and scientific configuration, advanced circuit design and temperature compensation processing fully ensure that the transmitter can work stably for a long time in a high temperature environment.

Examples include high temperature pressure monitoring for steam, food processing and engine monitoring.

RFQ Pressure Sensors

Featured High Temperature Pressure Transducers for Sale

High Temperature Pressure Sensor

High-Temperature Pressure Transmitter

Combined Pressure and Temperature Sensor-Dual function

Sanitary Pressure Transmitter

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

High Temperature Pressure Transducer Specifications

Range:0～1KPa～10KPa～400KPa, -0.1 ～ 0 ～ 1 ～ 60 (MPa), 0 ～ 10KPa ~ 100MPa
Comprehensive accuracy:0.25% FS, 0.5% FS
Output signal:4-20mA (2-wire system), 0-5 / 1-5 / 0-10V (3-wire system) Other customized output signals
Power supply voltage:24DCV (9 ～ 36DCV)
Medium temperature:-30 ℃ ～ 160-350 ℃, customized up to – 300~850 ℃.
Ambient temperature:Normal temperature (-20 ～ 85 ℃)
Load resistance:Current output type: maximum 800Ω; voltage output type: greater than 50KΩ
Insulation resistance:Greater than 2000MΩ (100VDC)
Long-term stability:0.2% FS / year
Vibration effect:In the mechanical vibration frequency 20Hz ～ 1000Hz, the output change is less than 0.1% FS
Electrical interface:bare wire; Hessman connector (customizable) Or customized size
Thread connection:M20 × 1.5, etc. Other threads can be designed according to customer requirements
Dimensions:M20 × Φ26.5 × 156 Or customized size
Shell protection:Plug type (IP65); cable type (IP67)
Safety explosion-proof:Ex iaⅡ CT5
Zero Temperature Drift0.05% per 10 degrees
Range Temperature Drift0.05% per 10 degrees
Safety Overload3 times overload
Ultimate Overload3 times overload
Response Time0.1s
High-Temperature-Pressure-Transmitter-dimension-300-350℃
High-Temperature-Pressure-Transmitter-dimension-500℃

Extended reading: High Pressure Flow Meters for Liquids-Steam-Gas

Ultra High Temperature Pressure Sensor

The ultra-high temperature pressure transmitter adopts special imported materials, isolated diaphragm design, and water circulation cooling method. The temperature of the measuring medium can reach 1300 ℃.

It is suitable for pressure measurement and control of high temperature media such as engine gas and kiln.

Such sensors are also commonly referred to as:
Ultra-high temperature pressure transmitter, ultra-high temperature pressure sensor, fuel pressure sensor, furnace pressure sensor, water-cooled pressure sensor, water-cooled pressure transmitter.

Extended reading: Heating Oil Flowmeters

Technical Difficulties in Pressure Measurement at High Temperature

High temperature conditions have certain requirements on the material, process and performance of the pressure transmitter. In order to ensure the measurement of High Temperature Pressure Transducer, we need to pay attention to the following points.

  1. Fully welded pressure transmitter.
    All connections between capillaries, transmitters and process connections are of fully welded hermetic construction. to eliminate possible leak points.
  2. According to different applications, the amount of filling oil can be precisely controlled.
    According to the user’s application and the characteristics of different filling oils. After careful calculation. Appropriately reduce the amount of filling oil. To compensate for the expansion effect of the filling oil.
    For low temperature applications, the amount of filler oil can be appropriately increased according to the specific application. to compensate for the effect of volume shrinkage of the filler oil.
  3. Special oil replenishment and oil discharge treatment.
    The main purpose of oil pretreatment for filler oil is to reduce dissolved gas content.
    And in the process of oil filling, vacuum oil filling is used. And strictly control the oil filling amount when the oil reaches the vacuum degree requirement. Guarantee the measurement accuracy of the final product.
  4. In modern technological processes, high temperature pressure transmitters often adopt symmetrical designs. Same diaphragm, same capillary length and same oil-filled fluid on both high and low pressure ends.
    It is generally believed that when the effect of temperature change acts on the high and low pressure sides of the transmitter. This effect will be eliminated. The effect of temperature on the diaphragm is generally considered to be the most important cause of temperature drift. In fact, the opposite is true.
    • Using the same length of capillaries on the high and low pressure sides did not improve performance. Instead, it increases the impact of temperature changes on the overall performance of the transmitter.
    • Pressure transmitters are temperature dependent not only by the amount of temperature change of the diaphragm of the base product. The length of the capillary is also an important factor affecting the temperature change of the transmitter. And the hardness is proportional to the length of the capillary.
    • The high and low pressure sides use the same capillary length, which is twice the length of the capillary. This increases the effect of temperature on the overall performance of the transmitter.
    • That is, if the process temperature is 150°C or less and the process conditions allow it. Then remove the high side port capillary and connect directly to the transmitter. The length of the capillary can be shortened. Reduce the impact of temperature changes on transmitter accuracy and response time.
  1. Choose according to the chemical properties of the measuring medium.
    • The corrosiveness of the same medium with different concentrations at different temperatures is also different.
    • Diaphragm sealed pressure transmitter, generally the inner diaphragm box is made of stainless steel. Wetted outer capsules are selected according to the characteristics of the medium.
    • At present, the commonly used materials are 316L, Monel, hafnium alloy and Tan diaphragm.
      Consider the housing material of the pressure transmitter according to environmental conditions and economy. Shell materials generally include aluminum alloy and stainless steel. If not in highly corrosive environmental conditions. It is more economical to choose aluminum alloy material.

Extended reading: How do you calibrate a smart pressure transmitter?

High Temperature Differential Pressure Transmitter

The high temperature differential pressure transmitter is only an instrument that can be used to measure the differential pressure of the medium under high temperature conditions.

It can work stably at 600℃ ultra-high temperature for a long time. Maintain the same high precision, high reliability and high stability as conventional single crystal silicon transmitters. Cost-effective. These three factors are the difficult points of Sino-inst technology research.

The brief principle of remote differential pressure transmitter for measuring 600℃-800℃ ultra-high temperature medium pressure is as follows:

The outer end faces of the connecting flange and the isolation flange are welded with the measuring diaphragm (meeting the requirements of the diaphragm’s resistance to medium corrosion) and the isolation diaphragm (conventional 316L diaphragm).

The heat sink is welded between the connection flange and the isolation flange, and then the ultra-high temperature resistant high-viscosity high-temperature filling liquid is injected to form an ultra-high temperature filling liquid cavity.

Weld the mating flange on the other end of the spacer flange. Connect capillary and pressure transmitter, differential pressure transmitter. Inject low-viscosity high-temperature filling fluid to form an ordinary high-temperature filling fluid cavity.

When working, the pressure of the ultra-high temperature medium is transmitted to the isolation diaphragm through the ultra-high temperature-resistant high-viscosity high-temperature filling liquid.

Then, the pressure of the ultra-high temperature medium is transmitted to the pressure transmitter and the differential pressure transmitter body through the low-viscosity high-temperature filling liquid in the capillary. Realized pressure transmission and measurement.

With high-temperature isolation and heat dissipation, ultra-high temperatures are not directly transferred to low-viscosity, high-temperature fill fluids. Thereby protecting the high temperature remote pressure transmitter and differential pressure transmitter. The pressure measurement of ultra-high temperature medium is realized.

Especially in the power generation system with molten salt as the heat transfer medium. The molten salt temperature as high as 560°C and the corrosiveness of molten salt have put forward higher requirements for pressure transmitters.

Utilizes a combination of ultra-high temperature silicone oil and an internal isolating diaphragm. The application temperature of the site is greatly increased to about 600 ℃. Greatly expands the application range of ultra-high temperature pressure/differential pressure measurement. It can be widely used in coal chemical industry and solar thermal power generation industry.

The selection ideas and methods of 600°C ultra-high temperature remote pressure transmitter/remote differential pressure transmitter are the same as those of conventional single crystal silicon remote pressure transmitter and remote differential pressure transmitter, and will not be repeated here. .

If you encounter high temperature measurement problems, welcome to communicate with Sino-Inst.

Extended reading: Industrial Pressure Transmitters|Buy from the manufacturer

Cooling Element

Cooling Element is mostly used in pressure gauges and High Temperature Pressure Transducers.

Cooling elements should be constructed of stainless steel to provide maximum corrosion resistance to most process media.
Female thread 20×1.5 and male thread 20×1.5 are standard.
Also supports customized according to customer requirements.

Extended reading:  Tri Clamp Sanitary Thermometers

Combined pressure and temperature sensor for Simultaneous measurement of pressure and temperature.

The Combined pressure-temperature sensor uses a special core. Thermocouple types are: J, K, E type or PT100 platinum resistance. Integrated structure of temperature and pressure. Measure the medium pressure and temperature at the same point at the same time. The combined pressure and temperature sensor has a built-in temperature / pressure sensor. The two outputs do not affect each other. Consuming the power of one sensor can complete the pressure and temperature measurement. Widely used in scientific research, military industry, petrochemical, electric power, metallurgical machinery and environmental protection fields. Such as oil well temperature and pressure measurement, diesel engine common rail temperature and pressure measurement, injection machinery temperature and pressure measurement.

Extended reading: Flat Pressure Sensor for High Viscosity Fluids

Frequently
Asked
Questions

Help Center

Yes. Temperature affects pressure transducers.
Temperature has a major impact on the functionality and operating life of most electronic devices. This is especially true for electronic pressure sensors.

This is why pressure sensor specifications generally include small and large values for operation, storage, and compensation of medium temperature. Exceeding these ranges can introduce unexpected errors in pressure readings. Or in extreme cases, leading to the failure of the complete instrument.

Another temperature specification – calibration temperature – can also be included in the data sheet.

Extended Reading: Selection of pressure transmitter

High pressure transducer is used to measure high pressure up to 1500Mpa. Also called ultra high pressure transducer.

High pressure transducer adopts ultra high pressure design. Suitable for high pressure applications up to 15000bar. SI-702S series ultra high pressure pressure transducer can provide reliable ultra-high pressure measurement. Ultra high pressure transmitter adopts rare metal alloy material. After special process treatment, integrated design. All stainless steel welding package. Laser resistance temperature compensation. With high performance digital processing circuit. The factory has undergone high and low temperature aging and long-term fatigue tests. Good long-term stability. Ultra-long working life. Maintain safe and stable operation in the ultra-high pressure range.

This depends on the user’s highest pressure requirements. Our common pressure transmitters also have a certain pressure range. If the customer is ultra-high pressure, such as 700MPa or even higher pressure. Sino-Inst supports customization.

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Target Flow Meter
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High Temperature Pressure Transducers are used in applications, where the media temperature exceeds the temperature limits of standard pressure transmitters.
Or where it is not possible to fit a standoff pipe,
pigtail or other cooling devices to reduce media temperature.

As high temperature pressure transducer manufacturer, Sino-Instrument supplies High Temperature Pressure Transducer with Best Price.

For example:
High Temperature Pressure Transducer, measure high temperature liquid, high temperature 300 degrees. The reference price is USD 200.00/pc.
High Temperature Pressure Transducer, measuring compressed air, high temperature 800 degrees. The reference price is USD 790.00/pc.

Tolerant to high-temperature applications such as steam, food processing & engine monitoring.

If you have a special request, you can just contact us for Technical Support.

Request a Quote

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Water Level Transducers – Detailed Guide

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What Is a Water Level Transducer?

Water level transducers are also called Water Level Sensors, or water level transmitters. Water level transducers are used to monitor water usage and quality. The water level signal is output through 4-20mA and other signals, which is convenient for people to monitor the water level.

There are many types of water level transducers. Common ones are input type, ultrasonic, radar and so on.

Sino-Inst offer a wide range of solutions with various pressure ranges, cable lengths and output options.

For remote monitoring and recording of water level data in groundwater pumping and sludge testing, stormwater flood analysis and runoff, and surface water irrigation canals, streams and river measurements.

RFQ

Featured water level transmitters for Sale

SI-151 Hydrostatic Level Sensor
SI-PCM261 Submersible Pressure Transducer
SI-10 Liquid pressure sensor
SI-PCM260 Deep Well Water Level Sensor
SIRD-908 Radar Water Level Sensor
SI-U01 Float Level Sensor
SI-U02 Multi-Point Liquid Level Float
ULT-100A Ultrasonic Level Transducer
Differential pressure(DP) level transmitter
SIRD-701 Guided Wave Radar Level Senso
ULT-200 Ultrasonic Level Detector
SIRD-909 Radar Non-Contact Water Level Sensor

level transducer types

In various industrial production processes, many auxiliary safety products are used. Among them, level transducer, as one of the most common auxiliary products, has many names. The following are 20 common level transducers:

  • Magnetic flap liquid level transducer
  • Float level transducer
  • Steel belt level transducer
  • Radar level transmitter
  • Magnetostrictive liquid level transducer
  • RF Admittance Level Transducer
  • Tuning Fork Level Meter
  • Glass plate/glass tube level transducer
  • Hydrostatic level transmitter
  • pressure level transmitter
  • Capacitive Level Transducer
  • Intelligent electric displacer liquid level transducer
  • Buoy Level Transducer
  • Displacer Level Transmitter
  • Electric contact level transducer
  • Magnetic two-color electronic liquid level transducer
  • External level transmitter
  • Hydrostatic Level Transducer
  • Ultrasonic Level Transducer
  • Differential pressure level transmitter (double flange level transmitter)

Extended Reading: What is level transmitter working principle?

types of water level sensors

We can divide Water Level Sensors into two categories by measuring whether they are in contact with the water level.

One type is contact type. Including single flange static pressure/double flange differential pressure level transmitter, float type level transmitter, magnetic level transmitter, input type level transmitter, electric internal float level transmitter Sensors, electric float level transmitters, capacitive level transmitters, magnetostrictive level transmitters, service level transmitters, etc.

The second category is non-contact. Divided into the ultrasonic level transmitter, radar level transmitter, and so on.

Extended Reading: Chilled Water Flow Meter

Submersible level transmitter is a kind of Hydrostatic water pressure level transmitter. It is widely used for its simple installation and reasonable price. Providing quick, accurate and reliable level measurement.

Cable 0m ～ 300m, minimum range 0.5m.

Submersible Water Level Sensor Specifications

Measurement form and range0～1～200mH2O
Overload allowed3 times full scale pressure
Operating temperature-20～80℃
Temperature compensation-10～70℃
Storage temperature-40～80℃
Accuracy (including nonlinearity, repeatability, hysteresis)0.2%FS(Typical) 0.5%FS(Maximum)
Stability error0.2%FS(Typical), 0.5%FS(Maximum)
Temperature drift coefficient0.01%FS (typical, range not less than 5mH2O)
0.03%FS (typical, less than 5mH2O)
Output signal(4～20)mA, (0～10/20)mA
(0～5)V, (1～5)V, )0～10)V
Power supply15～36 VDC (calibration voltage 24VDC)
Load (Ω)Current output type<(U-15V)/0.02A, current output type>5K
Shell materialStainless steel
O-ringFluorine rubber
Diaphragm316L stainless steel
CableSpecial waterproof and breathable cable
Protection classIP68 (pressure sensor part), IP65 (junction box transmitter part)

Learn More About Submersible Level Transducer

Radar sensor for water level is a level detection instrument using microwave technology. It is mainly suitable for detecting the water level of natural waters such as rivers and lakes. It can also be used for water level detection of large reservoirs, reservoirs, sewage canals and other open-air channels.

As a detection terminal, this product can effectively assist in monitoring the state of water level changes and provide accurate water level information for monitoring units.

Extended Reading: LORA water meter

The product adopts the pulse radar detection method, which can work stably around the clock. The measurement results are accurate and reliable.

The non-contact detection method makes its application range more extensive. It can even be used in complex water environments with organic pollutants or sediments.

Application: Rivers, Lakes, Shoal
Measuring Range: 70 meters
Process Connection: Thread G1½ A″ /Frame /Flange
Temperature: -40℃ ~ 100℃
Process Pressure: Normal pressure
Precision: ± 3mm; ± 10mm
Frequency Range: 26GHz
Protection Grade: IP67 / IP65
Power Supply: (6 – 24V) DC  / Four-wire
24V DC / Two wire
The Signal output: RS485 / Modbus ( 6~24V DC)
4~20mA / Hart Two wire ( 24V DC)
The Scene Display: Optional
Outer Covering: Aluminum / Plastic / Single chamber

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

The principle of liquid level measurement of pressure sensor

In physics, the pressure P of a liquid is determined by the relationship: p=ρgh.

For the same liquid, the liquid density ρ is constant. Therefore, the pressure P of the liquid is linearly proportional to the height h of the liquid surface (the height from the liquid surface). It is not difficult to find that the pressure of the liquid at different heights of the liquid level is also different.

When the pressure sensor is used to measure the liquid level, the pressure sensor is installed at the bottom of the tank. When the liquid level in the tank changes, the height h from the tank bottom to the liquid level is also changing at the same time. The pressure will naturally change accordingly. Thus, the purpose of continuous measurement is achieved.​​

One of the advantages of using pressure sensors for liquid level measurement is non-contact. Compared with mechanical and static methods, when measuring, it does not require many parts to be in contact with the liquid, and the installation is relatively convenient.

In addition, in terms of measurement principle, compared with similar non-contact measurement methods such as laser and ultrasonic, the relationship between pressure sensor measurement principle is simpler and linear, and it is more intuitive in data processing, analysis and processing.

Extended reading: Float Switch Water Level Controller

How does a water level transducer work?

Water level transducer is an instrument that can convert the water level parameter of the measured point into the corresponding electric quantity signal in real time.

The working principle of the Water level transducer is that when it is put into a certain depth in the liquid to be measured. The pressure on the sensor’s front surface is converted into the liquid level height.

The calculation formula is Ρ=ρ.g.H+Po.

In the formula P is the pressure on the liquid surface of the sensor;
ρ is the density of the liquid to be measured;
g is the local acceleration of gravity;
Po is the atmospheric pressure on the liquid surface;
And H is the depth at which the sensor drops into the liquid.

Extended reading: How to convert a 4-20mA to 0-10V /1-5V signal?

industrial water level sensor advantages and disadvantages

At present, the Submersible Water Level Sensor is the most used one.

Submersible Water level transducers generally use the piezoresistive effect of diffused silicon or ceramic sensing elements. Convert static pressure into electrical signal. Temperature compensated and linearity corrected. Converted to 4-20mADC standard current signal output.

The Submersible Water level transducer is directly put into the liquid, and the transmitter part can be fixed by flange or bracket, which is extremely convenient to install and use.
​​
The benefits of water level sensors

  • Good stability and high precision;
  • The Submersible Water Level Sensor is put directly into the measured medium. It is very convenient to install and use;
  • Input type, straight rod type, flange type, threaded type, inductive type, screw-in type, floating ball structure design. Anti-blocking design is available.
  • Simple installation, convenient use and strong interchangeability. High-quality level gauges have high sensitivity.
  • The response speed is fast, and it accurately reflects the subtle changes of flowing or static liquid level.
  • High measurement accuracy.
  • Solid-state structure, no moving parts, high reliability.
  • Long service life High-precision measurements are possible from water and oil to more viscous pastes.
  • A wide range of temperature compensation is not affected by the foaming, deposition, and electrical properties of the measured medium.
  • The Submersible Water Level Sensor has power reverse polarity protection and overload current limiting protection.

The disadvantages of Submersible Water Level Sensor are:

  • The measurement signal needs to be converted;
  • Cannot measure the temperature of high temperature medium over 125℃;
  • The density of the measuring medium must be uniform.

These points also limit its scope of use. But for water level measurement, Submersible Water Level Sensor is the perfect choice.

Extended Reading: 3 inch (3″) Water Meter

water level sensor applications

Uses of water level sensors include the following applications:

  • Water level measurement in pools and tanks
  • River and lake water level measurement
  • Marine level measurement
  • Level measurement of acid and alkali liquids
  • Oil level measurement of oil trucks and mailboxes
  • Swimming pool water level control
  • Tsunami Warning and Sea Level Monitoring
  • Cooling tower water level control
  • Sewage pump level control
  • Liquid level remote monitoring

Extended reading: Sludge Blanket Level Detector Appliactions

The river water level monitoring system is an important means to grasp the changes of river water conditions in real time, scientifically warn flood disasters, improve flood control command ability, and reduce the losses of rain and flood disasters.

System functions:

  • Real-time monitoring of river water level, expandable monitoring of rainfall, water quality and flow velocity.
  • Support remote photography or video real-time monitoring (video communication).
  • When the water level exceeds the limit, the sensor fails, and the battery voltage of the monitoring terminal is low, it will alarm immediately.
  • Automatically generate water level process curves and data statistical reports.
  • It can be linked with the drainage pump station. Automatically control the start and stop of the drainage pump group according to the water level of the river.
  • Support through OPC, database and other forms. Docking with other comprehensive monitoring application platforms.

The river water level monitoring system is compatible with various water level gauges such as ultrasonic, radar, float, laser, bubble, and input type.

Extended Reading: Low Cost Float Level Sensor for Tank Liquid Volume Monitoring

The reservoir/lake water and rain monitoring system is suitable for the water management department to remotely monitor the real-time data and on-site images such as the water level and rainfall of the reservoir/lake. In order to keep abreast of the changes in the water storage capacity of the reservoir/lake, to ensure moderate water storage and safe flood season.

  • Real-time monitoring of water level and rainfall of reservoirs/lakes, and timely grasp of water storage conditions
  • During optical fiber/5G/4G/3G communication, it supports real-time video surveillance. During 2G communication, it supports remote photography.
  • When the water level, rainfall exceeds the limit or the on-site equipment fails, it will automatically alarm and send an alarm text message to the mobile phone of the watchman. Automatically generate water level, rainfall time, day, month, year statistical reports and analysis curves.
  • Provide system interface. Support integration into the upper-level flood control and drought relief command system

Extended reading: Ultrasonic Water Meter Working Principle

digital water level recorder

Paperless Recorder is an intelligent Digital chart recorder. Data can be remotely recorded, analyzed, stored, and signal output. LCD color screen, maximum 16 channels.

R7100 series color paperless recorder supports 1-16 channels of universal input. R7100 has a powerful display function, real-time curve display, historical curve recall, bar graph display, alarm list display, power-down list display.

Configurable and optional inputs: standard voltage, standard current, thermocouple, thermal resistance, frequency, switch value, pulse, etc. It can be equipped with 6 relay alarm outputs, 6 feed outputs, 4 transmitter outputs, and RS232/485 communication interface is optional. Bluetooth function, GPRS function Ethernet interface, micro printer interface and USB interface.

Sino-Inst offers a variety of digital water level recorder instruments for industrial control. If you have any questions, please contact our sales engineers.

Frequently
Asked
Questions

Help Center

Level transducers are generally used where liquid level measurements need to be measured, and are suitable for liquid level and interface measurement of liquid media in containers. Level transducer is suitable for liquid level measurement of various media in petroleum, chemical, metallurgy, pharmaceutical and other industries.

Most of the measurement objects of Level transducers are liquid media. Because the objects to be measured are different, the measurement methods are also different. Therefore, Level transducers can be divided into many types. For example, there are ultrasonic liquid level sensors, input liquid level sensors, Magnetic flap liquid level sensor, etc. They are all a type of Level transducer.

There are many types of Water Level Transducers. Each Water Level Transducer has its own advantages.
Which is the best sensor for water level? There is no fixed answer.
You need to choose the best Water Level Transducer based on your measurement parameters.

Extended reading: Non contact level measurement

Level transducers are also called level transmitters. The Level sensor senses the change in liquid level and transmits the liquid level signal to the circuit board. After the conversion of the circuit board, the output is 4-20mA or other signals. This is the level transducer.

Water level measurement must first confirm the purpose of the measurement. Whether to monitor the height of the water level in real time or to alarm at a certain position to determine whether to choose a switch or continuous sensor.

Then select the appropriate Water Level Transducers.

If you need non-contact measurements. Then you can choose to use ultrasonic level meter. Ultrasonic technology is not only used to measure level, but also can be used to measure depth.

In liquid, the pressure generated at a certain depth is generated by the weight of the medium itself above the measurement point. It is proportional to the density of the medium and the local acceleration of gravity.

The formula P = ρgh reflects the proportional relationship between them.

Where P = pressure, ρ = medium density, g = gravity acceleration, h = depth of measurement point.

Therefore, the physical quantity measured by the input liquid level gauge is actually pressure. It can be understood by the calibration unit mH2O of the input level gauge. The actual liquid level must be obtained by conversion after knowing the two parameters of density and gravity acceleration. In the industrial field, such conversion is usually performed by a secondary instrument or PLC.

IP rating is short for Ingress Protection. The IP rating is the degree of protection for the enclosure of electrical equipment against the intrusion of foreign objects. The source is the standard IEC 60529 of the International Electrotechnical Commission. This standard was also adopted as an American National Standard in 2004.

If a submersible sensor is required. Then it needs to reach IP68.
Our Submersible Water Level Sensor can meet IP68.

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Sino-Inst offers over 10 Water Level Transducers About 50% of these are submersible liquid level meters, 40% is the others types.

A wide variety of Water Level Transducers for Liquid Level Measurement options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Water Level Transducers for Liquid Level Measurement instrumentation, located in China.

Request a Quote

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Explosion Proof Ultrasonic Level Sensor| Hazardous Area-Non Contact

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Explosion proof ultrasonic level sensor is a non-contact, easy to install and maintain liquid level measurement instrument.

It is used to measure flammable and explosive liquids such as diesel oil and crude oil. Or used to measure the height of liquids in explosion-proof environments. It is widely used in explosion-proof environments such as oil exploration, oil refining, chemical industry, and medicine.

RFQ

Featured Explosion Proof Ultrasonic Level Sensors

ULT-100 Ultrasonic Level Indicator
HS-2000 Ultrasonic Tank Level Sensor-External Mounted
HS-ULC Ultrasonic Level Switch-External Mounted
HS-ULC-Pro Ultrasonic Non-contact Liquid Level Controller

Intrinsically Safe/Explosion Proof

It is often necessary to use explosion-proof instruments in industrial sites. The general industrial explosion-proof instruments are mainly explosion-proof and intrinsically safe. So, how to understand the difference between them?

Flameproof definition:

It can withstand the explosive pressure of internal explosive gas mixture. And can prevent the internal explosion from spreading to the explosive mixture around the enclosure of electrical equipment enclosure (zone I explosion-proof technology).

Dangerous gases are allowed to enter the flameproof enclosure, which may cause an explosion. However, the enclosure must have sufficient strength. And each shell joint surface must have a sufficiently long engagement length and a sufficiently small gap. To ensure that the internal explosion will not pass through the flameproof joint and cause the external environment to explode.

Clearance explosion-proof technology. Rely on the gap and mesh length to achieve the effect of cooling and flameout.

Definition of intrinsic safety:

Any electric spark or any thermal effect generated under the conditions specified in the standard (including normal operation and specified fault conditions) cannot ignite the circuits in the specified explosive gas environment (Zone 0/I explosion-proof technology).

It is a “safe” technology that uses suppression of ignition source energy as an explosion-proof method. It is required that the electric spark or thermal effect that the equipment may produce under normal operation or failure state are respectively less than the minimum ignition energy and self-ignition temperature of the explosive dangerous gas. For example: hydrogen 19uJ 560℃.

Intrinsically safe technology is actually a low-power design technology. Therefore, it can be well applied to industrial automation instruments.

Explosion-proof applicable area: It can only be installed in hazardous locations in Zone 1 or Zone 2.

Intrinsically safe application area:

Exia: Equipment that can maintain explosion-proof performance until two components or other types of failures. Intrinsically safe equipment can be installed in hazardous locations in Zone 0, Zone 1, and Zone 2. Exia intrinsically safe equipment is the only explosion-proof electrical equipment that can be installed in zone 0.

Exib: Equipment that can maintain explosion-proof performance until a component or other type of failure. Intrinsically safe equipment can be installed in hazardous locations in Zone 1 and Zone 2.

Extended Reading: How many types of level transmitters are there?

Read more about: What Is the Difference Between Class 1 Div 1 and Class 1 Div 2 ?

Two-wire Explosion Proof Ultrasonic Level Sensor

  • Measurement range: 5m, 10m, 15m, 25m (selected according to the actual measurement range)
  • Blind area: 0.25m～0.8m
  • Ranging accuracy: 0.25% to 0.5% (standard conditions)
  • Ranging resolution: 1mm
  • Pressure: Below 4 atmospheres
  • Instrument display: Built-in LCD to display liquid level or space distance
  • Analog output: 4～20mA
  • Digital output: none
  • Power supply voltage: DC24V/1W, built-in lightning protection device
  • Ambient temperature: -20℃～+60℃ High temperature needs to be customized (customizable temperature resistance 90℃)
  • Protection class: IP65 or IP68

Extended reading: Case Study: Automatic Sludge Blanket Level Detector

Four-wire Explosion Proof Ultrasonic Level Sensor

  • Measurement range: 5m, 10m, 15m, 25m (selected according to the actual measurement range)
  • Blind area: 0.25m～0.8m
  • Ranging accuracy: 0.25% to 0.5% (standard conditions)
  • Ranging resolution: 1mm
  • Pressure: Below 4 atmospheres
  • Instrument display: Built-in LCD to display liquid level or space distance
  • Analog output: 4～20mA
  • Digital output: RS485, Modbus protocol or custom protocol
  • Relay output: two independent outputs
  • Power supply voltage: DC24V/AC220V, built-in lightning protection device
  • Ambient temperature: -20℃～+60℃ High temperature needs to be customized (customizable temperature resistance 90℃)
  • Protection class: IP65 or IP68

More about Factors To Consider When Choosing Explosion Proof Ultrasonic Level Sensors.

External Explosion Proof Ultrasonic Level Sensor

  • Range specifications optional: 3m, 5m, 10m, 20m, 30m
  • Display resolution: 1mm
  • Short time repeatability: 1mm
  • Measurement error: ±1‰FS (too thick tank wall, unstable pressure and temperature may affect the accuracy)
  • Migration amount: ±10 m
  • Current output: 4～20mA, maximum load 750Ω
  • Communication: RS-485, infrared interface
  • The ambient temperature of the liquid level gauge host: -30℃～+70℃
  • Ultrasonic probe using ambient temperature: -50℃～+100℃, (wide temperature probe can be provided according to customer needs)
  • Operating environment humidity: 15%～100%RH
  • Explosion-proof mark: Ex d IIC T6 Gb
  • Shell protection: IP67
  • Liquid level display: 6-digit OLED display (unit: m)
  • Blind zone: There is a measurement blind zone in the ultrasonic level gauge

Extended reading: Non contact level measurement

Ultrasonic Level Sensor Working Principle

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.

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

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

Ultrasonic Level Sensor for Tanks

Ultrasonic fuel tank level sensor, also called non-contact fuel meter. Ultrasonic level sensor measure continuous liquid level, fluid level, or oil level.

Ultrasonic level sensors measure the distance between the transducer and the surface. Using the time required for an ultrasound pulse to travel from a transducer to the fluid surface and back (TOF).  These sensors use frequencies in the tens of kilohertz range; transit times are ~6 ms/m.  The speed of sound (340 m/s in air at 15 degrees C, 1115 fps at 60 degrees F) depends on the mixture of gases in the headspace and their temperature.

More about Ultrasonic level measurement

Ultrasonic sensors work without the need to touch the medium being measured. Ultrasonic sensors are ideal for difficult or corrosive liquids such as acids, wastewater, and others. Ultrasonic level sensors are also ideal for continuous level measurement. While float switches and other sensors are adept at measuring when liquid levels are above or below a certain point. The nature of ultrasonic level measurement is such that levels can be sensed and displayed in real-time.

Read more about: Top 5 Ultrasonic Level Sensor Applications

Features of Ultrasonic Tank Level Sensor：

  • Non-contact – nothing touches the liquid
  • Easy to install at the top of the tank into standard fittings
  • Use indoors or outside, in metal or plastic tanks
  • Connects to other industrial equipment
  • Measures a wide variety of liquids and liquid environments
  • Accessories to display, alarm, and control liquid levels
  • Wireless option sends tank levels to a LAN or the cloud
  • MRO & OEM tank setup duplication without re-calibration

Read more about: Ultrasonic Tank Level Sensor-External Mounted

Frequently
Asked
Questions

Help Center

Application variables to avoid using ultrasonics are extreme foam, vapor, turbulent flow or installation in tall fittings with narrow risers.

Foam, steam and turbulence can absorb and/or deflect most of the return signal.

Tall riser fittings can disrupt the acoustic signal path. Proper product selection and installation is important.

Extended reading: Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank

The reason for the measurement failure of Ultrasonic Level Sensor is that the measurement distance of the ultrasonic level gauge refers to the calm liquid level. When the liquid level in the container fluctuates or is stirred, the liquid level is not calm and the reflected signal will weaken. to less than half of the normal signal, so the measurement value of the ultrasonic level gauge will be disturbed.

We want to eliminate the influence of agitation in the container on Ultrasonic Level Sensor measurement. We need to choose an ultrasonic level gauge with a larger range. If the actual range is 5 meters, use an ultrasonic level gauge with a range of 10 meters or 15 meters to measure.

If the Ultrasonic Level Sensor is not replaced, and the liquid in the tank is non-viscous. A still-pipe can also be installed. Place the Ultrasonic Level Sensor probe in the still-pipe to measure the height of the level gauge. Because the liquid level in the waveguide is basically stable. At the same time, it is recommended to change the two-wire Ultrasonic Level Sensor to a four-wire one.

Extended reading: Magnetostrictive Level Transmitter Working Principle

The ultrasonic sensor is an ultrasonic pulse signal sent by an ultrasonic probe, which propagates in the gas and is reflected after encountering the interface between the air and the liquid. high.

Extended reading: Radar Level Sensor Working Principle

More Explosion Proof Transmitters

Hygienic / Sanitary Pressure Transmitter
High-Temperature Pressure Transmitter
Absolute Pressure Transmitter
Hydrostatic pressure transmitter
Alternative to VEGAPULS 64-80GHz FMCW Level Radar
SIRD-905 Horn Antenna Radar Tank Level Sensor
Gas Thermal Mass Flow Meter
Vortex Steam Flow Meter
Precession Vortex Gas Flowmeter
Metal Tube Rotameter
Orifice Plate Flow Meter
Vortex Shedding Flow Meter

Related Blogs

Sino-Ins offers 20 Explosion Proof Ultrasonic Level Sensors products.

About 13% of these are ultrasonic level transducers, 4% are ultrasonic level indicators.

A wide variety of Explosion Proof Ultrasonic Level Sensor options is available to you, such as free samples, paid samples.

Sino-Inst is an Explosion Proof Ultrasonic Level Sensor supplier, located in China.

Explosion Proof Ultrasonic Level Sensor products are most popular in North America, Mid East, and Eastern Europe.

The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitters respectively.

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

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Slurry Flow Meter

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Flow Meter for Slurry Application

Slurry is a product of domestic sewage and industrial wastewater treatment. Slurry consists of solid impurities, a slurry of suspended substances. The main characteristic of Slurry is high moisture content, and industrial wastewater sludge contains toxic substances.

For challenging flow applications including suspended solids. Whether it’s wastewater treatment or mining. Electromagnetic flowmeters (commonly referred to as magnetic flowmeters) are a reliable and cost-effective method of accurate measurement. Magnetic flowmeters work well in Slurry due to their versatility and corrosion-resistant properties.

RFQ
FlowMeters

Featured Slurry Flow Meters

Industrial Slurry Flow

The measurement of industrial Slurry and sewage has been one of the difficult problems to be overcome by the measurement workers for many years. There are two main reasons for this.

One is the fluid characteristics: the medium is dirty, the solid-liquid dual phase, the composition is complex, and it is easy to adhere and deposit.

The second is the measurement characteristics: the field working conditions are harsh, the detection devices are easily damaged and difficult to maintain, and the reliability of the measurement instruments is high.

In recent years, with the continuous deepening of the low-cost strategy of Jinan Iron and Steel, the implementation of measures such as solid waste recycling and zero discharge of sewage. In the process, the iron-making dedusting water, the steel-making dedusting water, and the phosphorus-removing water (collectively referred to as industrial sludge water) are recycled to the sedimentation tank for filtration. The pump is pressurized and transported to the sintering plant for mixing and reuse. The accurate measurement of this industrial sludge water is directly related to the quality of the sinter.

For this reason, how to accurately measure industrial Slurry sewage has always been our topic of discussion.

Extended Reading: Differential Pressure (DP) Flow Meters Technology

What is the Best Flow Meter for Slurry？

Which sludge flowmeter is better to choose?
From the current measurement technology, it is more common to choose an electromagnetic flowmeter to measure sludge.
Sino-Inst considers electromagnetic flowmeter as Best Flow Meter for Slurry.

The properties of the sludge to be treated and the deep dewatering process of the sludge, the electromagnetic flowmeter has the following technical characteristics:

  1. It can measure the flow of almost all conductive liquids, silts, viscous materials and mud.
  2. A prerequisite for the measurement is that the medium must have a minimum conductivity.
  3. Temperature, pressure, density and viscosity do not affect the measurement results.

When measuring sludge, the type of electromagnetic flowmeter selected is the use of HC electrode, PTFE lining, one-piece type, 20% of the sludge is added with medicine and stirred into a sludge slurry (solid content is about 10%~15%) through pumping. on the pipeline.

In conclusion

  1. The electromagnetic flowmeter can be used for sludge with a solid content less than or equal to 15%, and the purpose of accurate and stable measurement in the slurry is achieved.
  2. The use of grounding flanges and a good grounding connection are necessary conditions to ensure the stable and reliable operation of the flowmeter.

Magnetic Inductive Flow Meter

Magnetic Inductive Flow Meter is a flow meter that measures the flow of conductive fluids. Abbreviated as EMF, also called Electromagnetic flowmeters. It is a kind of Volumetric flow meter. A magnetic flow meter measures the velocity of conductive liquids moving through a pipe or conduit. In the wastewater treatment industry, Magnetic Flow Meter is the best flow meter choice.

Magnetic flow meter working principle

Magnetic flow meters use the principle of Faraday’s Law of Electromagnetic Induction to measure the flow rate of liquid in a pipe. In the magnetic flowmeter pipe parts, a magnetic field is generated, and channeled into the liquid flowing through the pipe. 

Faraday’s Law states that the voltage generated is proportional to the movement of the flowing liquid. A conductor moving through a magnetic field produces an electric signal within the conductor. And the singal is proportional to the velocity of the water moving through the field. 

As fluid flows through the magnetic field, conductive particles in the fluid create changes. This variation is used to measure and calculate the velocity of water flow through the pipe. When the fluid moves faster, more voltage is generated. The electronic transmitter processes the voltage signal to determine liquid flow.

Magnetic flow meter principle – Faraday’s Formula

Faraday’s Formula
E is proportional to V x B x D where:

E = The voltage generated in a conductor
V = The velocity of the conductor
B = The magnetic field strength
D = The length of the conductor

To apply this principle to flow measurement with a magnetic flow meter. First is to state that the fluid being measured must be electrically conductive for the Faraday principle to apply.

As applied to the design of magnetic flow meters, Faraday’s Law indicates that:the signal voltage (E) is dependent on V, B, D.V is the average liquid velocity ;

B is the magnetic field strength ;

D is the length of the conductor ( which in this instance is the distance between the electrodes).

Extended reading: Flow meter totalizer calculation

Electromagnetic flowmeter to measure Slurry flow

Which sludge flowmeter is better to choose? In general, it is more common to choose an electromagnetic flowmeter to measure sludge.

  1. The electromagnetic flowmeter has no mechanical inertia and has a flexible response. It can measure the instantaneous pulsating flow, and can also measure the flow in both positive and negative directions.
  2. The output of the electromagnetic flowmeter is only proportional to the average flow rate of the measured medium. It is independent of the active state (laminar or turbulent) under a symmetric distribution. Therefore, the range of electromagnetic flowmeters is extremely wide. Its measurement scale can reach 100:1. Some even reach the operational flow scale of 1000:1.
  3. The sensor structure of the electromagnetic flowmeter is simple. There are no moving parts inside the measuring tube, nor any saving parts that impede fluid movement. So no additional pressure loss occurs when the fluid passes through the flowmeter. It is one of the flow meters with the lowest operating energy consumption in the flow meter.
  4. The caliber of industrial electromagnetic flowmeters is extremely wide. From a few millimeters to several meters, and there are real-flow calibration equipment with a diameter of 3m in China. It lays the foundation for the application and development of electromagnetic flowmeter.
  5. Electromagnetic flowmeter is a volume flow measurement surface. In the measurement process, it is not affected by the temperature, viscosity, density and conductivity (in a certain scale) of the measured medium. Therefore, the electromagnetic flowmeter only needs to be calibrated by water. It can be used to measure the flow of other conductive liquids.
  6. It can measure the flow rate of dirty medium, corrosive medium and suspended liquid-solid two-phase flow.

Frequently
Asked
Questions

Help Center

Normally, the slipry will be piped. So, we want to measure slipry. Then you need to install the flowmeter on the slurry pipeline.
Ideally, an electromagnetic flowmeter is installed to measure the slippery flow.

Extended Reading: Guide: Magnetic Flowmeter Installation

Most of the time, we would recommend using an electromagnetic flowmeter to measure the flow of slurries.
However, this does not mean that other flow meters cannot be used for the flow of slurries.

Which flowmeter is best for use? This needs to be selected according to the actual measurement parameters.

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

A flow meter also called a flow sensor, is a device or an instrument used to measure the linear, nonlinear, mass, or volumetric flow rate of a liquid or a gas.

Read more.

Totalizer flow meter is also called Totalizing flow meter. It refers to the totalizing function of the flow meter, or an instrument that can realize flow display and flow totalization.

Totalizer flow meter is also called Totalizing flow meter. It refers to the totalizing function of the flow meter, or an instrument that can realize flow display and flow totalization. The flow totalizer is used in conjunction with the flow sensor. The flow parameters can be measured and displayed, accumulated calculation, alarm, output, data acquisition and communication.

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Related Products

Sino-Instrument offers over 50 Slurry Flow Meter for flow measurement.

About 50% of these are differential pressure flow meters,

40% is the magneitc liquid flow sensor, and 20% are Ultrasonic Transmitter and mass flow meter.

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

Sino-Instrument is a globally recognized supplier and manufacturer of Slurry Flow Meter instrumentation, located in China.

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Measuring Steam Flow and Steam Flow Meters

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Measuring Steam Flow

Measuring Steam Flow is a difficult task. But again, it’s a very important thing. Steam flow measurement is difficult, the main reason is determined by the characteristics of steam. Steam is a relatively special medium. With the change of working conditions (such as temperature, pressure). Superheated steam is often transformed into saturated steam, forming a vapor-liquid two-phase flow medium.

Steam is an important energy substance. For energy consumption calculation or cost accounting. An accurate metering of the steam consumed is usually required using a flow meter.

RFQ FlowMeters

Steam Flow Meters for Sale

Vortex Shedding Flow Meter
Vortex Steam Flow Meter
Insertion Vortex Flow Meter
Threaded Vortex Gas Flow Meter
Voretx Sanitary Flow Meter
Integral DP Flow Meter
Welding Orifice Plate
Venturi Flow Meter
 Annubar Flow Meter
Target Flow Meter
Rotameter flow meter-Variable Area Flow Meters

U-Series Liquid Mass Flow Meter

Inaccurate steam flow measurement is a common Requirement in the heating industry. The main reasons are as follows:

superheated steam

Steam is a relatively special medium. Generally speaking, steam refers to superheated steam. Superheated steam is a common power source. It is often used to drive steam turbines to rotate. And then drive the generator or centrifugal compressor to work.

Superheated steam is obtained by heating saturated steam. There is absolutely no droplet or liquid mist in it, and it is an actual gas.

The temperature and pressure parameters of superheated steam are two independent parameters. Its density should be determined by these two parameters.

After the superheated steam is transported over a long distance, it changes with the working conditions (such as temperature and pressure). Especially when the degree of superheat is not high, it will enter the saturated or supersaturated state from the superheated state due to the decrease of the heat loss temperature.

Converted to saturated steam or supersaturated steam with water droplets. The saturated steam is suddenly decompressed greatly. When a liquid expands adiabatically, it also turns into superheated steam. In this way, a vapor-liquid two-phase flow medium is formed.

Read more about: Condensate Flow Meter-Steam Condensate Flow Meter|Types & Selection Guide

Saturated Vapor

Steam that has not been heat treated is called saturated steam. It is colorless and odorless. Non-flammable and non-corrosive gases. Saturated steam has the following characteristics:

(1) There is a one-to-one correspondence between the temperature and pressure of saturated steam. There is only one independent variable between the two.

(2) Saturated steam is easy to condense. If there is heat loss during transmission. Droplets or mist form in the steam. and lead to a decrease in temperature and pressure. Steam containing liquid droplets or mist is called wet steam.

Strictly speaking, saturated steam contains more or less a two-phase fluid of liquid droplets or mist. Therefore, different states cannot be described by the same gas state equation.

The content of liquid droplets or mist in saturated steam reflects the quality of the steam. It is generally expressed by the parameter of dryness. The dryness of steam refers to the percentage of dry steam per unit volume of saturated steam. Indicated by “x”.

(3) It is difficult to accurately measure the flow rate of saturated steam. Because the dryness of saturated steam is difficult to guarantee. General flowmeters cannot accurately detect the flow rate of two-phase fluid. Fluctuations in steam pressure will cause changes in steam density. Additional errors will occur in the indication value of the flowmeter. .So in steam measurement, it is necessary to try to maintain the dryness of the steam at the measurement point to meet the requirements. If necessary, compensation measures should be taken to achieve accurate measurement.

Extended reading: What Is Difference Between Rotameter And Flow Meter?

Analysis of Steam Measurements

Flow meters are currently used to measure steam flow. The measurement medium refers to single-phase superheated steam or saturated steam.

For steam with frequently changing phase flow, there will definitely be inaccurate measurements.

The solution to this problem is to keep the steam superheated and minimize the water content of the steam.

For example, strengthen the insulation measures of steam pipelines and reduce the pressure loss of steam. to improve the measurement accuracy.

However, these methods cannot completely solve the problem of inaccurate steam flow measurement. The fundamental solution to this problem is to develop a flow meter that can measure two-phase flowing media.

There are many types of flow meters used to detect gas flow. The most common applications are velocity and volumetric flow meters. Their common feature is that they can only measure the volume flow under operating conditions continuously. The volume flow is again a function of the state.
The volume flow in the working state cannot exactly represent the actual flow.
In engineering, it is generally expressed as standard state volume flow or mass flow.
The so-called standard state volume is the volume of gas at 0°C and 1 standard atmosphere or the volume at 20°C and 1 standard atmosphere.

The case where mass flow is the unit of measurement. At present, when the scale gas flow meter is not used in many applications. The normal temperature and pressure of the selected gas are the design conditions. Convert the volume flow under the design state to standard volume flow or mass flow. Its conversion coefficient contains the factor of gas density. When the working state of the gas medium deviates from the design state, the flow indication value will have errors.

Furthermore the composition, content or temperature of the gaseous medium changes. It also affects flow measurement. Therefore, the measurement of steam flow needs to take compensation measures. In addition, the compensation factors due to the state change of the steam are also complicated.

The density of superheated steam is determined by the temperature and pressure of the steam.

And in different ranges of parameters, the expression of density is also different. cannot be represented by the same general formula. Therefore, a unified density calculation formula cannot be obtained.

The temperature and pressure compensation formulas can only be derived individually.
In the case of large temperature and pressure fluctuation range. Except for temperature and pressure compensation. Compensation for the gas expansion coefficient Σ also needs to be considered.

No matter what kind of flow meter is used to detect the flow of saturated steam. When working under conditions of steam pressure fluctuations, pressure compensation measures must be taken. This is because the steam density factor is included in the flow equation. When the operating conditions are inconsistent with the design conditions, the readings will have errors. The size of the error and the working pressure are related to the size of the design pressure deviation. A negative error will occur if P real > P set. Otherwise there will be a positive error.

The dryness condition of steam is an important condition related to whether the steam flow can be accurately measured. At present, the online steam dryness testing instrument is being developed. The application of the dryness meter to the steam flow measurement and compensation system will further improve the measurement accuracy. The following three measures should be taken at present:

  1. The pipeline for conveying steam must have good insulation measures to prevent heat loss.
  2. Drain the steam pipeline section by section, and set steam traps at the lowest part of the pipeline and the pipeline in front of the instrument to drain the condensed water in time.
  3. During the operation of the boiler, the phenomenon that the liquid level of the steam drum is too high should be avoided, and the large fluctuation of the load should be minimized.

Selection of Steam Flow Meters

There are 5 main factors to consider when choosing a flow meter for steam metering:
Characteristics of the fluid being measured, production process conditions, installation conditions, maintenance requirements, and characteristics of the flow meter.

Here, we focus on discussing the characteristics, installation conditions, maintenance requirements and several issues that should be paid attention to when choosing a flow meter.

At present, the instruments for measuring steam flow mainly include vortex flowmeter, differential pressure type (orifice plate, uniform velocity tube, elbow) flowmeter, split rotor flowmeter, Annubar flowmeter, float flowmeter, etc.

The differential pressure transmitter is used to measure the fluid, and the flow rate is calculated from the pressure difference generated before and after the throttling element due to the change of the flow rate when passing through the throttling element. The measurement principle of differential pressure flowmeters with different throttling elements is the same.

This measurement method is based on the flow continuity equation and the Bernoulli equation. The magnitude of the differential pressure is not only related to the flow. It is also related to the structural form of the throttling element or the physical properties of the fluid in the pipeline. Therefore, the flow calculation needs to consider the correction factor of various influencing factors.

The differential pressure flowmeter has a narrow measurement range. Since the differential pressure signal and the flow rate are in a square relationship, the general range is (3:1)~(4:1).

According to different applications and accuracy requirements, each throttling element has its own characteristics and advantages.

For example, the orifice plate has higher precision; compared with the orifice plate, the nozzle has the characteristics of stable outflow coefficient and lower pressure loss. Under the same working conditions, it is 30%~50% of the orifice plate. It is very suitable for the measurement of steam flow; the Venturi requires short straight pipe sections before and after.

Extended reading: How to realize the flow accumulation function in PLC?

Vortex flowmeter is a new type of flowmeter successfully developed based on the principle of Karman vortex flow. Because it has the advantages that other flow meters cannot have both. It has developed rapidly since the 1970s. According to reports, the proportion of vortex flowmeters used in developed countries such as Japan, Europe and the United States has increased significantly. It has been widely used in various fields. Will dominate the flow meter in the future. It is an ideal substitute for orifice flowmeter.

It has the following characteristics:

  • Simple and firm structure, no moving parts, very reliable long-term operation;
  • The maintenance is very convenient and the installation cost is low;
  • The sensor does not directly contact the medium, with stable performance and long life;
  • Output pulse signal proportional to flow. No zero drift, high precision, and easy to network with computer;
  • Wide measurement range, turndown ratio up to 1:10;
  • Small pressure loss, low operating cost, and more energy-saving significance;
  • Within a certain range of Reynolds number, the output signal frequency is not affected by changes in the physical properties and composition of the fluid. The gauge factor is only related to the shape and size of the vortex generator. The volume flow of the fluid is measured without compensation. There is no need to re-calibrate the coefficient of the instrument after exchanging accessories;
  • Wide range of applications, both gas and liquid flow can be measured;
  • The verification period is 2 to 4 years.

The elbow flowmeter is actually a 90-degree standard elbow, and there is no flow sensor with a simpler structure.

With the development of the machining industry and the continuous improvement of industry standardization and standardized management, the standard mechanism elbows used as elbow sensors are becoming more and more cost-effective.

Its unique features are:

  • Simple structure and low price.
  • Elbow flowmeter sensors are wear-resistant and insensitive to trace wear.
  • The installation is simple and can be installed by direct welding. The trouble of running and dripping on the spot is completely solved.
  • It has strong adaptability, wide measuring range, and the requirements for straight pipe sections are not strict. As long as the fluid flow in the pipeline that can be measured by orifice plate, vortex street, and uniform velocity tube flowmeter can be measured by elbow flowmeter. And in terms of high temperature resistance, high pressure resistance, impact resistance, vibration resistance, moisture resistance, dust resistance, etc., the elbow flowmeter is far superior to other flowmeters.
  • The range ratio of the elbow flowmeter can reach 1:10, for steam. Its applicable range is 0~70m/s. It can better meet the requirements of steam flow measurement.
  • Due to its special measurement principle, the elbow flowmeter does not have strict requirements on the straight pipe section in practical application. Generally, only the first 5D and the rear 2D are required. Far below the requirements of other flow measurement devices.
  • The elbow flowmeter has high accuracy and good repeatability. The measurement accuracy can reach 1.14%, and the repeatability accuracy can reach 0.2%. After one installation, it does not need to be disassembled repeatedly. Therefore, its installation accuracy can also be optimally guaranteed.
  • The most prominent feature of the elbow flowmeter is that it does not have any additional throttling parts or inserts. It can greatly reduce the power consumption of fluid transportation in the pipeline. It saves energy. It is especially beneficial for those measuring objects with large systems, large pipe diameters and low pressure heads. more obvious.

Frequently
Asked
Questions

Help Center

How to measure the steam flow? Maybe everyone knows how to measure it with a flowmeter. Because there are many types of flowmeters on the market. I don’t know how to choose. There are liquids, gases, slurries and so on.
First, the temperature of the steam is relatively high. We have to choose a flowmeter that can withstand high temperature to measure. For example: V cone, orifice plate, Annubar, vortex flowmeter, etc. can be measured.

The commonly used flowmeters for steam flow measurement include differential pressure flowmeters, vortex flowmeters, rotor-type steam flowmeters, V-cone flowmeters, elbow flowmeters and flute uniform velocity flowmeters. The working principle and usage requirements of these steam flow meters are different.

The use of a steam flow meter can be used to directly measure the steam usage of a plant operating project.

This can be used to monitor the results of energy saving programs. And compare the efficiency of one project with another.

Steam can then be costed as a raw material at any stage of the production process, allowing the cost of individual product lines to be determined.

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The choice of Measuring Steam Flow and steam flow meter is very important. Accurately measuring steam flow is a need and a common concern in the production sector. With the development of the economy, the voice of improving the measurement level is getting louder and louder.

We should choose the appropriate flowmeter according to the actual measurement conditions.

The choice of Measuring Steam Flow and Steam Flow Meters has always been an industry challenge.

Sino-Inst, Manufacuturer for Steam Flow Measurement Flowmeters.

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

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New Trend of Transformer Oil Level Indicator

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What is Transformer Oil Level Indicator?

The Transformer oil level indicator is specially designed to measure and indicate the oil level in transformer tanks, oil conservators and on-load tap-changers. Transformer Oil Level Indicator – Also known as Liquid Level Indicator or OLI for short. Glass tube oil level gauge and pointer oil level gauge, these two are traditional Transformer oil level indicators.

RFQ Level Sensors

About Transformer Oil

Transformer oil is a fractionation product of petroleum. Its main components are alkanes and naphthenes. It is a light yellow transparent liquid. It is a kind of insulating oil. In oil-immersed transformers, transformer oil mainly plays the role of insulation and cooling.

Why is Transformer Oil Level Indicator so important?

The abnormal oil level of the transformer is mainly due to the oil level being too high and too low.

Oil level too high

When the transformer oil level is higher than the maximum oil level line. Depending on the cause, different methods should be used to deal with it.

If it is caused by overload, the load should be reduced.

If the three-phase current is seriously unbalanced and the current of a certain phase exceeds the rated value. The load should be adjusted to achieve a basic balance.

If the cooler is abnormal, the temperature of the transformer oil rises. Oil expands when heated. cause the oil level to rise. Then check whether the cooler is blocked by dust accumulation, and whether the upper and lower valves of the oil pipe are open. Whether the fan and submersible pump are running normally. Whether the temperature of the cooling medium is appropriate, etc. Prompt treatment returns the cooler to normal operation.

If the oil level is too high due to excessive oiling of the transformer, the oil should be drained to an appropriate height.

Oil level too low

When the transformer oil level is significantly lower than the oil level corresponding to the oil temperature at that time. The oil level is too low when the oil level is below the minimum oil level line or is not visible.

When the transformer leaks oil. The oil was not replenished in time after the oil was drained due to work, or the original oil level of the transformer was not high. When the transformer load suddenly drops or the external ambient temperature drops significantly, the oil level will be too low.

Too low oil level will cause gas protection action. When there is a severe shortage of oil, the transformer core and windings will be exposed to the air. It is easy to get wet and reduce the insulation ability, and may even cause insulation breakdown.

Therefore, when the transformer oil level is found to be too low. The reason should be found and dealt with.

If the oil level is low and no oil leaks are found. The operator should report and replenish qualified transformer oil of the same type as soon as possible.

If it is because of an oil leak, the oil level has dropped significantly. Measures should be taken to eliminate the oil spill and refuel immediately to bring the oil level back to normal.

If a lot of oil leaks. When the oil level drops too much, it endangers the safe operation of the transformer. A dispatch application should be reported to deactivate the transformer.

Transformers for large-scale strong oil circulating water cooling. If the oil level is found to be low. Check the water for oily flowers. To prevent water seepage in the oil from endangering the transformer insulation. Replenish the oil after finding out the cause.

On the other hand, the transformer oil level rises or falls due to seasonal changes. is a normal phenomenon.

If the oil level is too high in summer, try to drain the oil. When the oil level is too low in winter, try to refuel. In order to maintain the normal oil level and ensure the safe operation of the transformer.

Therefore, the normal oil level should be maintained when the transformer is running. In order to monitor the oil level of the transformer, the oil pillow of the transformer is equipped with a glass tube oil level gauge or a magnetic needle oil level gauge.

When the transformer is running, under normal circumstances, the oil level of the transformer changes with the change of the transformer oil temperature.

When checking the oil level, pay attention to whether it is a fake oil level.

When the oil pillow respirator is blocked, the vent of the explosion-proof pipe is blocked, the oil gauge pipe is blocked or the oil level gauge is damaged, the false oil level will appear.

At this time, although the changes of transformer oil temperature, ambient temperature, load, etc. are normal. But the oil level does not change or changes abnormally.

Extended reading: Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank

Oil level indicator types for transformers

transformer oil level sight glass

An oil pillow is an oil storage device used in transformers.

Its function is that when the transformer increases the load, the oil temperature rises, and the oil in the oil tank expands, and then too much oil will flow into the oil pillow.

Conversely, when the temperature drops, the oil in the oil pillow will flow into the oil tank again. It can automatically adjust the oil level. That is, the oil pillow plays the role of oil storage and oil replenishment. Make sure the tank is full of oil.

At the same time due to the equipped oil pillow. Reduce the contact area between the transformer and the air. And the moisture, dust and oxidized grease absorbed from the air are deposited in the depositor at the bottom of the oil pillow. Thereby greatly slowing down the deterioration rate of transformer oil.

There is a glass oil level gauge (or oil level gauge) on the side of the oil pillow. The change of the oil level in the oil pillow can be observed at any time.

Pointer Type Oil Level Gauge

In power systems, oil-immersed transformers above 35 kV usually adopt a hermetic design. And equipped with oil conservator and oil level gauge with capsule bag.

The commonly used oil level gauges for transformers are divided into pointer oil level gauges and tube oil level gauges.

The working principle of the pointer oil level gauge is when the oil level of the oil conservator changes. Cause the change of the diaphragm, causing the linkage rod to move up and down. Through the action of magnetic torque, the driven magnet pointer is driven to indicate the oil level.

The working principle of the pointer oil level gauge is when the oil level of the oil conservator changes. Drive the oil float up and down, and use the pressure relief valve to adjust the oil level to indicate the oil level.

Extended reading: High Temperature Flow Meter

Monitoring Transformer Oil Conservator Oil Levels with Pressure Sensors

Pressure sensors are widely used in liquid height measurement. The liquid height can be obtained by measuring and converting the liquid pressure value. In the transformer conservator, an oil drain is usually connected to the bottom of the conservator for oil draining.

To eliminate the harsh requirements of mechanical transmission and fully enclosed conditions. At the same time, it can meet the precise measurement of the oil level of the oil conservator. By installing a pressure sensor at the end of the oil drain pipe. The oil level height of the oil conservator is calculated by the two-point pressure difference algorithm.

In liquid height measurement, it can be calculated by pressure, and the calculation formula of liquid pressure is:

P = ρgh

where:
ρ is the density of the liquid;
g is the acceleration of gravity, which is 9.8 m/s2;
h is the liquid level height.

Through the two pressure sensors installed in the oil level detection device, two pressure values P1 and P2 can be obtained,
in:
P1 = ρ1 gh1
P2 = ρ2 gh2
h3 = h1 – h2

For small objects in the transformer oil conservator, the oil temperature difference between the two points of the oil drain pipe is negligible, so it can be considered that ρ1 = ρ2, h1 can be obtained by calculation, and then the oil level can be calculated.

h1 = P1 h3 P1 – P2

where:
P1 and P2 are the pressure values of two points;
h3 is the height difference between two points (this value is a definite value).

By this method, the influence of the change of the insulation temperature of the oil conservator on the measurement results can be eliminated.

Extended Reading: Mechanical flow meter for diesel

Online Oil Level Monitor for Non-contact Transformer Conservator

The transformer oil pillows are all closed. The maintenance and replacement of the existing oil level gauges require power outages, openings, and oil draining, which is very complicated. Therefore, a non-contact transformer oil pillow oil level is installed in
Line monitor is very necessary.

Sonar ranging principle:

The probe is adsorbed on the bottom of the oil pillow by a magnet. The sonar wave (mechanical wave) emitted by the probe can penetrate the steel wall and propagate upward in the oil. It will be reflected back when it encounters the oil-gas interface, and detected by the probe.

The oil level height h.h=V×t/2 is calculated by detecting the time difference t between the transmitted wave and the returning wave combined with the sound velocity value V. of the oil.

The principle of sonar distance measurement is the best solution for non-contact measurement of oil level in the oil pillow.

It only needs to attach the probe to the outer wall of the bottom of the oil pillow through the magnet to measure the internal oil level height. The probe does not touch the internal medium. Real non-contact measurement is realized.

There is no need to open holes on the oil pillow, which is very convenient for installation and maintenance.

Extended reading: RF Admittance Level Sensor

Featured oil level indicator types

  • Manual Oil Tank Level Measurement
  • Magnetic flip level gauge for Tank Level Sensing
  • Buoyancy Method for Oil Level Measurement
  • Hydrostatic level gauge for Oil Level Measurement
  • Ultrasonic method for Oil Level Measurement
  • Electrical method for Oil Level Measurement
  • Radar Level Sensors for Oil Level Measurement
  • Magnetoelectric method for Tank Level Sensing
Magnetostrictive Level Transmitters
Non-Contacting Radar Level Measurement
Float Level Sensors – Single and Multipoint
SIRD70 Guided Wave Radar Level Transmitters
Ultrasonic Level Sensing
Capacitive Level Sensors
Hydrostatic Level Measurement
Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank

HS-ULC-Pro Ultrasonic Non-contact Liquid Level Controller
ULT-100A Ultrasonic Level Transducer
HS-2000 Ultrasonic Tank Level Sensor-External Mounted
HS-ULC Ultrasonic Level Switch-External Mounted

Frequently
Asked
Questions

Help Center

The Oil Level Indicator (OLI) was developed in response to the need of maintenance professionals to gauge the oil level inside large tanks, gearboxes and reservoirs.

Extended reading: Magnetostrictive Level Transmitter Working Principle

A tank level sensor is a level sensor used to measure the tank level. The liquid level is the level of the liquid in a sealed container (such as a water tank) or an open container (water tank). The instrument that measures the liquid level is called a liquid level sensor, a liquid level gauge, or a liquid level transmitter. The liquid level sensor is a kind of level instrument. Hydrostatic, Ultrasonic, Magnetostrictive, Radar, Differential Pressure are common choices for tank level measurement. Liquid level sensors have been around for decades for leak detection or level measurement. Commonly measured mediums are Water, Fuel, Diesel, Gasoline, diesel, liquefied gas, liquid ammonia, etc.

Extended reading: Amazing Solutions for Continuous Liquid Level Measurement

Related Blogs

Sino-Inst offers over 10 Solutions for Transformer Oil Level Indicator. About 50% of these are float liquid level meters, 40% are the level switches.

A wide variety of Solutions for Transformer Oil Level Indicator options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Solutions for Transformer Oil Level Indicator instrumentation, located in China.

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