The ultrasonic water flow meter is a commonly used water flow meter. It can be installed with an external clamp, Insertion installation, pipeline installation, etc. Hand-held clamp-on ultrasonic flowmeters are very popular for their ease to use.
Use a portable ultrasonic flowmeter to test the pipeline of the entire system, which can reveal the location of the leak.
The portable flow meter allows the operator to compare the flow rate and the total flow rate at various points in the system.
The low flow at the site indicates that there is a leak nearby. This method is non-invasive and does not require cutting the pipe.
Two ultrasonic flowmeters, one is installed on the water outlet pipe of the reservoir, and the other is installed at the critical intermediate position where the pipe is spread from underground to the ground.
As long as the measurement of the two flowmeters is the same, it means that there is no water leak in the buried pipe network. On the contrary, there is water leak.
When a single conduit in a complex piping configuration is compromised, it can be challenging to locate the precise point where the leak occurred. If you observe an increase in overall water consumption without making any changes, it is likely that a pipe has cracks or cracks.
Transit time 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.
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
Sino-Inst’s Ultrasonic Water Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
3″ water meter is also DN80 water meter. Easy to read. Totalizing water volume. Intelligent large-caliber remote water meter includes wired remote transmission and wireless remote transmission. RS485 communication equipment, MODBUS, etc.
The specifications of 3″ Water Meter are as follows:
Executive standard
CJ/T224-2006
Measurement accuracy level
Class B
Temperature class
T30, T50, T70, T90
Pressure Level
MAP10
Pressure loss level
△P63
Maximum allowable error
a) Low area (Q1≤Q<Q2) The maximum allowable error is ±5% a) When the water temperature is ≤30℃, the high zone (Q₂Q<Q) is the largest Allowable error is ±2% Q1 Q2 When the water temperature is ≥30℃, the high zone (Q₂QQ) is the largest Allowable error is ±3% Q2 Q4
Electronic technical indicators
Bus power supply: external supply DC6.5V~18V Working current: -5uA Communication interface: RS-485 interface; MBUS interface External power supply: 5~10V
technical standard
The technical parameters of this product conform to national standards GB/T778.1~3-2007 (ISO464-1~3:2005IDT) regulations The electronic device complies with Electronic Remote Water Meter”
The pressure loss level of the water meter is △p63, which represents the maximum pressure loss of 0.063MPa
The pulse output water meter is a water meter with a very unique design.
It has the characteristics of passive signaling. A square wave signal can be output without a power supply. The distance reached one kilometer. And the transmitted signal is very accurate.
The water meter has a self-retaining function. Avoid more possibility of false signal. It can ensure that the signal has no errors.
Prevent all kinds of water theft from happening.
The service life is also very long, and the service life of the remote transmission part can be as long as ten years.
The water meter supplied by Sino-Inst can be configured with pulse output. When you place an order, please confirm with our sales engineer.
In addition to the water meter described at the top of this article. We also have many types of water meters. Such as turbine water meter. Ultrasonic water meter. Electromagnetic water meter, etc.
In addition to the water meter described at the top of this article. We also have many types of water meters. Such as turbine water meter. Ultrasonic water meter. Electromagnetic water meter, etc.
The types of water meters can be divided by the principle of measurement, the common types are:
a) Mechanical water meter: Measuring sensors, calculators and indicating devices are all water meters with mechanical principles and structures. There are mainly speed water meters and volumetric water meters.
b) Mechanical water meter with electronic device: The mechanical water meter with complete structure is retained, and the water meter with an electronic device is installed on this basis, mainly including IC card water meter and remote water meter. The measuring sensor of the mechanical sensor electronic water meter is composed of a sensor based on the principle of mechanical motion and a sensor element that can convert the mechanical motion into an electrical signal and input into the calculator. Both the calculator and the indicating device are electronic components, such as a vortex (impeller) wheel electronic water meter.
c) Electronic water meter: Electronic water meters are divided into mechanical sensor electronic water meters and electronic sensor electronic water meters. The measuring sensor of the electronic water meter is based on the principle of electronic or electromagnetic induction. Both the calculator and the indicating device are electronic components. Such as ultrasonic water meter, jet water meter, Coriolis water meter, and electromagnetic water meter.
What is the working principle of the water meter? It’s actually very simple. Because the housing of the water meter is fixed. Its internal volume is fixed. And the water is flowing. It pushes an impeller to rotate. Whenever the impeller rotates, there is a constant volume of water flowing through. Therefore, as long as the number of revolutions of the impeller is accumulated and multiplied by this constant volume, the total amount of water flowing through can be obtained.
The diameter of the water meter should be determined according to the diameter of the installation pipeline. The installation position should avoid exposure, flooding, freezing and pollution, and it is convenient to disassemble and swipe.
The water meter should be installed horizontally (display face upward).
The sand, gravel, hemp and other sundries in the pipeline should be removed before new installation to avoid malfunction of the water meter.
The direction of the arrow shown on the water meter should be consistent with the direction of water flow in the pipeline.
If the water meter is installed at the water inlet of the boiler, it is necessary to prevent the return of hot water and steam from the boiler from damaging the internal parts of the water meter. It is best to install a check valve at the water outlet of the water meter.
The prices of water meters vary. The price of the water meter is mainly determined by the material, caliber, and function. For example, residential water meters. 3/4 inch, without special function, reference price USD95.00/pc.
For the specific water meter price, please contact our sales engineer for confirmation.
Clamp on flow meters refers to the non-contact flow meter, or strap-on flow meters, which clamps…
Sino-Inst offers over 30 water meter products. About 50% of these are ulrtasonic flow meters. 40% are mechanical water meters.
A wide variety of water meter options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of water meter, located in China.
The top supplying country is China (Mainland), which supply 100% of the water meter respectively.
Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Water meter 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.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
The analog flow meter is a flowmeter with the analog output signal. Analog output is a common function of flow meters. The analog signal is mainly used to output the flow signal to the next control system.
Analog signal: poor confidentiality, weak anti-interference ability.
Digital signal: strong anti-interference ability and good communication confidentiality.
Digital signal, as the name implies, means that the independent variable is discrete. And the dependent variable is also a discrete signal. The independent variable of a digital signal is represented by an integer. Its dependent variable is represented by a limited number. The digital signal uses two physical states to represent 0 and 1. Therefore, the quality of the digital signal is very strong, and the anti-interference ability is also relatively strong.
The analog signal refers to the continuous signal of the information parameter in a given range. The characteristic quantity of the information of the analog signal can be transformed into an arbitrary numerical signal in an instant. In the process of transmitting analog signals, the information signals need to be converted into electric wave signals, which are then transmitted through wired or wireless methods.
If you need to know the flow rate in you pipe, or river, that when you need a flow meter. So, flow meter is the instrument that can finish the flow measurement.
Flowmeters consist of a primary device, transducer and transmitter.
The transducer senses the fluid that passes through the primary device.
The transmitter produces a usable flow signal from the raw transducer signal.
These components are often combined, so the actual flowmeter may be one or more physical devices.
Different types of flow meters are available for different applications, and depending upon the requirement, a careful selection of flow meters is made.
For e.g., we prefer vortex flow meters flow steam flow measuremnet. And we like the ultrasonic flow meters for non-contact pipe flow measuremnt.
A turbine-type flow meter cannot be used for measuring the flow in an unclear liquid (wastewater or corrosive liquids).
A flow meter (or flow sensor) is an instrument used to measure the linear, nonlinear, mass, or volumetric flow rate of a liquid or a gas. When choosing flow meters, one should consider such intangible factors as familiarity of plant personnel, their experience with calibration and maintenance, spare parts availability, and mean time between failure history, etc., at the particular plant site.
It is also recommended that the cost of the installation be computed, only after taking these steps different sensors include dial, in-line, ultrasonic, orifice plate, totalizing meters, variable area, venturi, or switch output. The different designs of the flow meters have a variety of applications.
Sino-Inst offers a variety of Micro flow meters for flow measurement. If you have…
Sino-Inst offers over 50 Industrial analog flow meters for flow measurement. About 50% of these are gas flow meters, 40% are the liquid flow sensor, and 20% are the Ultrasonic and mass flow meter.
A wide variety of Industrial analog flow meters options are available to you, such as free samples, paid samples.
Sino-Instrument is a globally recognized supplier and manufacturer of flow measurement instrumentation, located in China.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Magnetic Water Flow Meter is an electromagnetic flowmeter used to measure conductive fluids. Conductive liquids such as drinking water, sewage, wastewater, seawater, ammonia, cement slurry, etc.
Magnetic Water Flowmeters provide highly accurate flow measurements for a wide variety of conductive fluid applications. Magnetic Water Flow Meter is a volumetric flow meter that measures liquids or liquid slurries that have a minimum conductivity of 5 µS/cm. Based on Faraday’s law of electromagnetic induction. Magnetic Water Flow Meter is ideal for wastewater applications or any dirty liquid which is conductive or water-based. It is widely used in water treatment, environmental protection sewage measurement and control, papermaking, and other industrial and agricultural production processes for flow measurement and control.
2 inch magnetic flow meter reference price: USD 500.00/pc.
2-inch mechanical water flow meter, bulk purchase, the cost can be reduced to USD 15.00/pc
Of course, in addition to the three 2inch water flow meters introduced here. There are other types of flow meters that can also be used to measure the water flow rate.
A Digital flow meter is a flow meter that can display the flow rate, and have the output for the flow rate. Like 4-20mA output, HART, RS 485, and so on. Digital Flow Meter is also called Electronic Water Flow Meter. Digital Flow Meter is widely used in industrial water and household water measurement. Most of the Sino-Inst flow meters are digital flow meters. Like the electromagnetic flowmeter, Portable ultrasonic flow meter, Turbine flow meter…..
A chemical flow meter is a flowmeter used to measure common chemical fluid media. In chemical production control and metering, between chemical reaction storage tanks. As an important monitoring instrument, the flow meter is also used as an instrument for internal cost accounting and foreign trade measurement.
You may often hear about ultrasonic flow meters, electromagnetic flow meters, turbine flow meters, volumetric flow, or mass flow. Chemical flow meters are common in industries like petrochemical plants and refineries. Sino-Inst offers a wide range of liquid and gas flow meters to help you regulate the flow of water, petroleum products, fuels, chemicals, and more.
Compared with other flow meters, the mechanical flowmeter relies on the rotation and displacement of mechanical parts to measure the flow rate. Common mechanical flow meters have the following categories.
In most cases, we will choose an electromagnetic flowmeter to measure the flow rate of water. But if it is pure water and cannot conduct electricity, then an electromagnetic flowmeter cannot be used. You can choose a turbine flowmeter to measure.
Potable water flow meter also called Drinking water. Potable water flow meters are important for Domestic industries. Accurate flow measurement is essential to cost-conscious drinking water and potable water system. From water storage, transmission lines to raw water, water treatment and more.
Reducing costs and improving flow control is on everyone’s mind. Depending on the requirements of your domestic water applicaiton, there are lots of options.
Including: Insertion and inline electromagnetic flowmeters. Insertion Turbine meters with stainless steel wetted parts. Inline and clamp on type ultrasonic flow meters. Differential pressure flow meters offer unbeatable value in cost of installation and ownership. The extraction of drinking water usually starts from wells, reservoirs and large tanks. Large diameter pipes carry the extracted water and transfer them to the local distribution system.
Therefore, Potable water flow meters usually need to be suitable for large diameter pipes, such as 6 inch, 4 inch, 3 inch. Of course, 2inch and 1inch pipe flowmeters are also very common. Sino-Inst’s potable water flow meters offer versatile, accurate flow measurement used in facilities across the globe.
Please feel free to contact Sino-Inst for further conversation.
Inline water flow meters are instruments that can be installed directly on water flow pipes to display flow. In principle, there are mechanical, ultrasonic, electromagnetic, and so on. Used in residential water pipes or industrial water pipes.
On the whole, Water Flow Meter Price, the cost of a mechanical water flow meter will be lower than that of a digital water flow meter.
The prices of 2 inch turbine flowmeters, electromagnetic flowmeters, and ultrasonic flowmeters are all similar.
As a manufacturer. Sino-Inst is more willing to provide better prices for your bulk purchases. If you are interested, please contact our sales engineer as soon as possible.
Sewage flow meter, also known as a wastewater flow meter. The sewage flow meter…
FAQ
Mechanical liquid flow meters are a type of positive displacement flow meters, which are the most accurate type of flow meters. It uses a mechanical measuring element to continuously divide the fluid into a single known volume part. The total flow volume is measured according to the number of times that the metering chamber is filled and discharged with the volume part of the fluid successively and repeatedly.
An line flow meter is a flow meter with the function of displaying flow rate on-site. The sensor of the flow meter is installed on the fluid pipe. Digital display or pointer shows the flow rate on the spot.
In-line flowmeters could be digital and mechanical flow meters. Common in-line flowmeters include turbine flowmeters, electromagnetic flowmeters, and ultrasonic flowmeters. With stainless steel material, analog and 4-20mA output, in-line flow meters can measure and controll inline flow.
The water flow meter is an instrument specially used to measure the flow of water in pipes. You can get many different types of water flow meters from your facility.
When used in certain applications, each flow meter has its own advantages. For many pipelines and similar systems, the water must be maintained at a specified flow rate to ensure the effective operation of the system.
Sino-Inst offers over 20 2 inch Water Flow Meters, with the Best Price.
A wide variety of flow meter options are available to you, such as free samples, paid samples.
About 13% of these are magnetic flow meters, 14% are Insertion Magnetic Flow Meter, 25% are ultrasonic flow meters, 13% are Handheld ultrasonic flow meters, and others are Liquid Turbine Flow Meters.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
A digital air flow meter refers to a flow meter that can accurately measure air or compressed air inline. Industrial Digital air flow meters can be divided into mass flow meters or volume flow meters.
The digital air flow meter is also a digital gas flow meter. The digital air flow meter can measure and display parameters such as mass flow, volume flow, gas temperature, atmospheric pressure and gas pressure of air or other gases. Such as argon, hydrogen, nitrogen, etc.
A digital air flow meter is different from a mechanical gas flow meter. The first is because of the local digital display. For example, a vortex flowmeter, or a handheld gas mass flowmeter. The parameters of the gas pipeline can be displayed locally. The second is because of the signal output. Mechanical gas flow meters cannot support signal output. But digital air flow meter generally supports signal output. Convenient for monitoring system or control system management. Such as 4-20mA, RS485 and so on.
CFM is a common imperial flow unit, cubic feet per minute. For a certain volume of air flow passing in a unit time, m3/h air volume unit is generally used in China. Other countries also use the British air volume unit cfm (cubic foot per minute). That is ft3/min cubic feet/minute, 1CFM=28.316846592 L/MIN=0.028316847 m3/min
CFM is a common imperial flow unit, cubic feet per minute. For a certain volume of air flow passing in a unit time, m3/h air volume unit is generally used in China. Other countries also use the British air volume unit cfm (cubic foot per minute). That is ft3/min cubic feet/minute, 1CFM=28.316846592 L/MIN=0.028316847 m3/min
A compressed air flow meter is an upgraded and improved gas vortex flow meter. The Karman vortex airflow sensor is researched and produced according to the Karman vortex principle.
Compressed air is an important energy source for manufacturing companies. Therefore, accurate measurement is of great significance to energy saving, emission reduction and cost accounting in the factory. Sino-Inst Vortex compressed air flowmeter is resistant to pipeline vibration.
The value is not easy to jump randomly. An excellent partner for you to achieve accurate measurement. Integrated temperature and pressure compensation. The compensated instantaneous flow and cumulative flow can be read directly on the meter, Temperature, pressure and other data.
All of the above gas flow meters can be used to measure air flow. And the measurement of common industrial gas flow. Such as oxygen, hydrogen, nitrogen, argon, etc. Based on different measurement parameters such as pressure, temperature, pipe size, flow range, etc. We will choose the right flowmeter for you.
Digital flow meters measure and display the flow rate of industrial liquid and gas. Like water, oil, natural gas, oxygen, diesel fuel, and more. And all pipe sizes are available, for 1/2″, 2inch, to 8 inches.
Different digital flow sensors include turbine, thermal mass, electromagnetic, ultrasonic, orifice plate, venturi. The different designs of the flowmeters have a variety of applications. With 4-20ma, RS485, or other output.
A Digital Water flow meter is a flow meter that can display the water flow rate, and have the output for the flow rate. Like 4-20mA output, HART, RS 485, and so on. Digital Water Flow Meter is also called Electronic Water Flow Meter. Digital Water Flow Meter is widely used in industrial water and household water measurement. Most of the Sino-Inst flow meters are digital water flow meters. Like the electromagnetic flowmeter, Portable ultrasonic flow meter, Turbine flow meter…..
Digital flow meters are high-tech devices. Also called smart flow meters. They’re used for gauging and displaying qualities like mass flow rate, volumetric flow rate, gas temperature, atmospheric pressure, and gas pressure.
To measure air flow mechanically, an anemometer can be used. To intelligently measure air flow, you can use the various Digital Air Flow Meters we mentioned above.
A flow meter (or flow sensor) is an instrument used to measure linear, nonlinear,mass or volumetric flow rate of a liquid or a gas.When choosing flow meters,one should consider such intangible factors as familiarity of plant personnel,their experience with calibration and maintenance, spare parts availability,and mean time between failure history, etc., at the particular plant site.
It is also recommended that the cost of the installation be computed,only after taking these stepsThe different sensors include dial, in-line, ultrasonic, orifice plate,totalizing meters, variable area, venturi, or with switch output.The different designs of the flow meters have a variety of applications.
Flow Metering Principles
Differential Pressure Flowmeters
Velocity Flowmeters
Positive Displacement Flowmeters
Mass Flowmeters
For Open Channel Flowmeters – weirs, flumes, submerged orifices, current meters, acoustic flow meters and more
For different working principle, We offer different types of flow meters, like:
How to choose a Hydrogen flow meter? Hydrogen is a valuable and widely measured industrial gas…
Sino-Instrument offers over 50 Digital air flow meters for air/compressed air flow measurement.
About 50% of these are vortex flow meters, 40% are the thermal mass flow sensor, and 20% are turbine and DP flow meters.
A wide variety of Digital air flow meters options are available to you, such as free samples, paid samples. Read more about: Importance Of Air Flow Measurement
Sino-Instrument is a globally recognized supplier and manufacturer of flow measurement instrumentation, located in China.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Updated 2026-05-31 by the Sino-Inst Engineering Team
A bimetal stemmed thermometer is only as accurate as its calibration and its immersion. Calibrate it to the 32°F (0°C) ice point. Push the stem at least 2 inches into the medium. And match the ASME B40.200 accuracy grade to the tolerance your process needs. Skip any one of those and the dial reads with total confidence and is still wrong. This guide walks through the calibration steps first, then immersion, accuracy, and how to choose the right thermometer.
What Is a Bimetal Stemmed Thermometer, and How Does It Work?
A bimetal stemmed thermometer measures temperature with a coil of two bonded metals that expand at different rates. As the temperature changes, the coil winds or unwinds and rotates a pointer on the dial. There is no power, no battery, and no electronics — just a mechanical movement reading the medium the stem sits in.
That simplicity is the appeal. These thermometers are rugged, cheap, and give a clear local reading on a pipe, tank, oven, or boiler. The trade-off is that they are mechanical: vibration and shock cause calibration drift, and they react more slowly than an electronic probe. If you need a remote signal for a control system, you want a temperature transmitter instead — but for at-a-glance field readings, the bimetal dial is hard to beat.
How Do You Calibrate a Bimetal Thermometer?
There are two field methods: the ice-point bath and the boiling-point test. The ice point is the one to use day to day, because it is more repeatable and does not depend on your altitude. Both end the same way: you hold the calibration nut under the dial head with a wrench and turn the dial until it reads the reference.
Method
Reference
How to do it
Ice point (preferred)
32°F / 0°C
Fill a cup with crushed ice, add cold water, wait 1 min. Insert the stem past the dimple, keep it off the sides, wait 30 s, adjust the nut to read 32°F.
Boiling point
212°F / 100°C at sea level
Insert the stem to cover the sensing area in boiling water, let it stabilize, adjust to the boiling point for your elevation.
Recalibrate after any drop or hard knock, and check a thermometer used for food or quality records at the start of each shift. If the dial will not hold the reference after adjustment, the movement is worn and the instrument should be replaced rather than nursed along.
What Temperature Should You Calibrate To?
Calibrate to 32°F (0°C) in an ice-water bath, or to 212°F (100°C) in boiling water at sea level. The ice point is fixed everywhere, which is why it is the standard reference. The boiling point is not. Water boils lower as you climb, dropping roughly 1°F for every 500 feet of elevation. A boiling-point calibration done at altitude without correcting will set the dial too high.
Pick the reference closest to your working range. If you check refrigeration or chilled product, the 32°F ice point is right next to your readings. If you run hot process near 200°F, a boiling-point check brackets it better. Either way, verify at a single fixed point you trust rather than guessing against another thermometer that may also be off.
How Deep Must the Stem Be Immersed?
Immerse the stem at least 2 inches (50 mm) in liquid, or at least 4 inches (100 mm) in gas, to reach rated accuracy. Below that, heat conducts up the stem to the ambient air and the reading drifts toward room temperature — a mistake called stem conduction error. It is the single most common reason a correctly calibrated dial still reads wrong in service.
Most stems carry a dimple or groove marking the minimum sensing depth; get that mark below the surface. In a thin pipe where you cannot reach 2 inches straight in, use an angled or adjustable-angle thermometer, or a thermowell that lets the stem sit along the flow. Never judge immersion by eye on a short stem in a gas duct, where the 4-inch requirement is easy to underestimate.
How Accurate Is a Bimetal Thermometer? ASME B40.200 Grade A vs B
Industrial bimetal thermometers are specified to ASME B40.200 (formerly B40.3), which sets accuracy as a percent of full scale. Grade A is ±1% and Grade B is ±2%. Because the tolerance is a share of the whole span, a wide range costs you resolution. A 0–500°F Grade A dial is ±5°F, while a tighter 50–300°F dial of the same grade resolves much closer.
General indication where trend matters more than exact value
The lesson for selection: do not over-buy range. Choose a span that brackets your normal operating temperature with a little headroom, and the same grade will give you a tighter real-world reading. Pairing the grade with proper immersion and a fresh ice-point check is what actually delivers the number on the datasheet.
How to Choose One: Range, Dial Size, Connection, and Thermowell
Range — bracket your operating temperature; common spans run from -40 to 550°C. Tighter range plus Grade A gives the best resolution.
Dial size — 1″ to 5″; bigger dials read from farther away on tanks and overhead pipes.
Stem length — long enough to clear the 2″ liquid / 4″ gas immersion rule at the mounting point.
Connection — back, bottom, or adjustable-angle so the dial faces the operator.
Thermowell — required on pressurized or fast-moving process lines so you can remove the thermometer without breaking containment.
Hygiene — for food and pharma, choose a sanitary, cleanable design and check the ice point daily.
Bimetal vs Digital, Thermocouple, and RTD: When to Use Which
Reach for a bimetal dial when you want a rugged, powerless local reading and roughly ±1% is good enough. Move to an electronic sensor when you need a remote signal, tighter accuracy, or faster response. A thermocouple suits very high temperatures — see our Type K thermocouple chart and the platinum-rhodium types for furnaces and kilns. An RTD wins on accuracy and stability in the moderate range; our guide on RTD vs thermocouple covers the choice. For high-heat applications a furnace thermocouple replaces the dial entirely, and where you need a logged record a paperless recorder captures the trend.
Threaded-connection thermometer for HVAC and process where the display sits away from the measuring point. Easy-read dial for hard-to-reach spots.
Frequently Asked Questions
What temperature should a bimetal thermometer be calibrated to?
Calibrate to 32°F (0°C) using an ice-water bath, or to 212°F (100°C) in boiling water at sea level. The ice point is preferred because it is fixed regardless of altitude. Hold the calibration nut and turn the dial to the reference.
How do you calibrate a bimetal stemmed thermometer?
Fill a cup with crushed ice and cold water, wait a minute, then insert the stem past the sensing dimple without touching the sides. After 30 seconds, hold the nut under the dial with a wrench and adjust the pointer to 32°F (0°C).
How deep should the stem be immersed?
At least 2 inches (50 mm) in liquid and 4 inches (100 mm) in gas, with the dimple below the surface. Shallow immersion lets heat escape up the stem — stem conduction error — and pulls the reading toward ambient.
How accurate is a bimetal thermometer?
Per ASME B40.200, Grade A is ±1% of full scale and Grade B is ±2%. Because it is a percent of the whole span, a narrower range gives a tighter reading at the same grade, provided the stem is properly immersed and recently calibrated.
What is the temperature range of a bimetal stemmed thermometer?
Common ranges run from about -40 to 550°C, with many narrower spans available. For higher temperatures a thermocouple is the better choice. Pick the narrowest range that still brackets your operating point for the best resolution.
Bimetal vs digital thermometer — which is better?
A bimetal dial is rugged, needs no power, and is ideal for local readings at roughly ±1%. A digital sensor is better when you need higher accuracy, faster response, or a remote signal to a controller or recorder. Many plants use both.
About this article
Written and technically reviewed by the Sino-Inst engineering team — last reviewed 2026-05-31 (AI-assisted drafting). Based on ASME B40.200 accuracy grades and ice-point / boiling-point calibration practice, plus field experience installing bimetal dial thermometers on process, HVAC, and food lines. Questions? Reach our application engineers.
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Tell us your temperature range, connection, and mounting, and a Sino-Inst engineer will recommend the right bimetal thermometer grade, stem length, and thermowell.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Interface level measurement is very important for oil and gas, chemical tanks. At the same time, Interface level measurement is also a measurement and control challenge.
In today’s increasingly modernized oilfield production, automated crude oil processing has become a guarantee for the quality of refined oil. The performance of the oil-water interface fundamentally affects several key issues in crude oil processing: the water content of crude oil, energy consumption, sewage discharge indicators, etc.
Here we mainly compare the working principle, usage and common failures of several oil-water interface instruments commonly used in North China Oilfield. Hope to help you find a suitable solution when measuring oil-water interface.
Interface level measurement technologies
According to the different measurement principles of the interface instrument, the interface instrument can be roughly divided into: magnetic radio frequency admittance type, short wave absorption type, capacitive type, servo type and so on.
Among them, the magnetic interface instrument is divided into: reed tube type magnetron interface instrument, magnetostrictive interface instrument and other forms.
Interface level measurement using Magnetostrictive interface instrument
A rigid tube or flexible tube leads from the top to the bottom of the tank, and the float with magnetic steel moves up and down along the wave guide with the liquid surface.
During the measurement, the current pulse excites a stress pulse on the waveguide in the tube where the magnetic float is located. Propagate along the waveguide to the measuring part in the top electronic box at the speed of sound. Is converted into electrical pulses.
The position of the liquid level can be determined based on the propagation time of the stress pulse.
If there is a second float, choose the relative density appropriately. Make it float on the oil-water interface. Then the position of the oil-water interface can be measured at the same time.
Interface level measurement using Reed switch level sensor
The reed tube type magnetic control interface instrument is also called the magnetic float ball level gauge.
This type of interface instrument was used earlier in the oil field, and now there are more problems.
The measurement principle is extremely simple. Attach a circuit board consisting of a reed switch and resistors. The length is determined by the height of the measured medium.
Put it into a stainless steel tube, as the magnetic float sleeved outside the steel tube moves with the liquid surface, the magnetic force will attract the corresponding dry reed tube. The resistance value of the output terminal of the circuit board also changes accordingly.
According to the density of the measured crude oil. Appropriately match magnetic floats with different relative densities. The liquid level and interface can be measured.
The meter is based on the theory of medium absorption of short waves. Electric energy is radiated into the oil-water medium in the form of an emulsion in the form of electromagnetic waves. The content of the two media is detected based on the difference in the electric energy absorbed by the oil and water.
The dielectric constant of oil is about 2.3, while that of water is about 80. There is a great difference between the two.
The oil-water interface is detected by measuring the oil-water content.
Capacitive interface meter uses the difference in electrical conductivity between oil and water media to make the capacitance and the height of the water have a linear relationship. To achieve the purpose of monitoring the oil-water interface.
Nowadays, radio frequency admittance type is used to replace the traditional capacitive interface instrument.
Capacitive Level Sensors can be used for point level detection and continuous level measurement, particularly in liquids. The measuring principle is based on the change of the capacitance in a capacitor. The electrically conductive tank wall and a probe inside of the tank form a capacitor, The capacity changes of which are used to determine the level. This animation shows the measuring principle in conductive liquids and non-conductive liquids. The Capacitive Level Sensor can convert the changes of various levels and the height of the liquid level into standard current signals. Level Sensors can also support wireless transmission, RS485 digital communication transmission, etc.
Interface level measurement using Servo Level Meter
Servo Level Meter is a high-precision measuring instrument that measures the level of liquid level with microelectronic technology and servo motor drive technology.
Servo Level Meter can carry out routine and accurate measurement and signal transmission of liquid level, interface level and density of the measured medium. It also has functions such as temperature transmission. It can meet the requirements of storage tank inventory management, loss control cost saving and safe operation.
Servo Level Meter is explosion-proof design and has strong expandability. It can be widely used in a variety of flammable and explosive places. It is an ideal choice for liquid level measurement in storage tanks in the fields of petroleum and petrochemical, electric power, medicine, and food.
Single Servo Level Meter: It can realize real-time oil tank level, boundary level measurement display and remote transmission display.
Servo Level Meter is equipped with a multi-point thermometer and a tank side display: it can measure and display the liquid level, boundary level and temperature of the oil tank at different heights on site.
Differential pressure (DP) transmitters are used to measure the interface of two fluids with different specific gravities. This measurement can be made with or without a distal seal. It is important that the height must be large enough to create a reasonable DP between the two specific gravity limits.
Suppose the measuring H distance is 1.2m, the density of oil is 0.7, and the density of water is 1.0. The pressure guiding pipe on the high and low pressure side is filled with water as a sealing liquid. Find the range of the differential pressure transmitter.
Solution:
Differential pressure at the lowest water level: P=(ρoil×g×H)-(ρwater×g×H)
=(0.7×9.8×1.2)-(1.0×9.8×1.2)=-3.528Kpa
Differential pressure at the highest water level: P=(ρwater×g×H)-(ρwater×g×H)
=(1.0×9.8×1.2)-(1.0×9.8×1.2)=0Kpa
The range of the transmitter is: -3.528Kpa to 0 Kpa
Quick calculation of range: (ρ water-ρ oil)×g×H=3.528Kpa
Note: This algorithm is only used for working conditions with obvious oil and water layers. It is undesirable if oil and water are miscible to form an emulsified quality.
In oil field production, oil-water separation is an extremely important link in crude oil processing. After the crude oil enters the joint station, it has to go through treatment processes such as sedimentation and power-off. Oil-water interface control is the key to the separation effect.
Nowadays, oilfields generally use special oil-water interface meters to monitor the process. To achieve the purpose of automatic control.
At present, there are many types of oil-water interface instruments. The performance difference is relatively large. Based on the actual situation of the North China Oilfield, the use of the interface instrument is specifically analyzed.
First, give a general introduction to the basic process flow of oilfield production. After the crude oil is extracted, it is sent to the oil production metering station for measurement, and then enters the joint station.
At the joint station, after metering and heating, the crude oil is sent to the primary settling tank. The crude oil in the primary sedimentation tank is kept at about 60°C all year round.
After sedimentation and separation, it is sent to the intermediate tank. After dehydration pump dehydration. After secondary heating, it enters the secondary settling tank.
The crude oil in the secondary settling tank is kept at about 80℃ all year round. The separated crude oil enters the electric dehydrator for final treatment. After reaching the moisture content standard (0.5%). Finally, it is sent to the refined oil storage tank.
In the whole process, it is necessary to measure the oil-water interface. The accurate monitoring of the oil-water interface is critical to the recovery of water content of oil products and the cost of treatment.
Capacitive level sensor is based on the change of capacitance to perform liquid/level measurement. The level gauge electrode and the container form two electrodes of a capacitor. The capacitance value varies with the container. The level of the material medium changes and changes, and is converted to the corresponding level output signal. A basic requirement for measuring liquid/level with a capacitance level meter is: the relative medium of the measured medium. The electrical constant (the ratio of the dielectric constant of the measured medium to the air) should not change during the measurement. Extended reading: Amazing Solutions for Continuous Liquid Level Measurement
There are 7 main types of level transmitters that Sino-Instrument offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.
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Sino-Inst offers over 10 Solutions for Oil-water Interface Level Measurement. About 50% of these are interface liquid level meters, 40% is the level switches.
A wide variety of Solutions for Oil-water Interface Level Measurement options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Solutions for Liquid Level Measurement instrumentation, located in China.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
64-80GHz FMCW Level Radar is a radar sensor for continuous level measurement of liquids. Sino-Inst also launched a radar level sensor operating at 76-81 GHz.
FMCW radar operating at 76-81 GHz;
Maximum measuring range of 120m and a minimum blind zone of 8cm;
3°antenna beam angle;
Suitable for small water tanks or small process accessories in narrow spaces.
Good signal focusing ability can be used for containers with many internal installations.
Measurement accuracy:±1mm
Installation method: Thread or flange, clamps are optional.
Anti-dust, anti-steam condensation
Sino-Inst offers a variety of Radar Level Sensors for industrial level measurement. If you have any questions, please contact our sales engineers.
The LM78xx series is an FMCW radar operating at 76-81 GHz, which has a maximum measuring range of 120m and a minimum blind zone of 8cm. It supports 4-wire and 2-wire applications. Higher operating frequency and shorter wavelengths make it ideal for solid applications, including those with extreme dust and high temperature to + 200℃.
The radar consists of an electronic circuit coupled to a lens antenna and flange for quick and easy positioning.
The main benefits of using 78 GHz over devices using lower frequency are:
Based on the self-developed CMOS millimeter wave RF chip, a more compact RF architecture, a higher signal-to-noise ratio, and a smaller blind zone are realized.
5GHz working bandwidth means higher measurement resolution and accuracy.
3°antenna beam angle, so the interference in the environment has less impact on the instrument, and the installation is more convenient.
Shorter wavelength yields good reflection properties on sloped solids, so aiming towards material angle of repose is usually not necessary.
Support remote debugging and remote upgrading to reduce the cost of field personnel.
Communication and Programming
LM78XX supports 485 bus protocol (4-wire), serial-port (2-wire) protocol, and hart (2-wire) protocol. It is very easy to install and configure via an optional graphical local display interface on a PC. Or you can modify the built-in parameters either locally via the pushbuttons. Or you can use a cell phone to control LM78xx via Bluetooth.
Special advantages are the small process fittings for small tanks or tight spaces. The very good signal focusing allows use in vessels with many internal installations.
LM78 series FMCW Level Radar Applications
It is suitable for large range, high dust, steam condensation, mixing, narrow installation space, and occasions with high precision and blind zone requirements.
The influence of high frequency and low frequency of radar liquid level sensor on measurement
The influence of frequency on measurement
The radar level sensor emits electromagnetic waves through an antenna, and the higher the frequency of the electromagnetic waves. The higher the energy of the electromagnetic wave and the shorter the wavelength, the more obvious the scattering phenomenon. Conversely, the lower the energy, the longer the wavelength, and the energy is not easily absorbed by the gas phase layer.
For an antenna of the same size, a level gauge with a wavelength of 1.2 cm and a frequency of 26 GHz has 6 times higher gain than a level gauge with a wavelength of 3 cm and a frequency of 10 GHz. (Note: Antenna gain is a parameter indicating the degree of concentration of directional antenna radiation).
The received signal diagrams of different frequencies (26-10-6 GHz), the same antenna, dielectric constant, and distance increase are as follows:
The total beam width of the radar level sensor is inversely proportional to the frequency of the device.
Therefore, for an antenna with the same diameter, if the frequency of the radar level sensor is increased, the beam width will be lower than that of a lower frequency device. The narrow beam minimizes the influence of the nozzle, tank wall, and interference.
As shown in the picture (the left side is 6 GHz, the right side is 26 GHz).
At the same time, the measurement range of the radar liquid level sensor is also affected by factors such as frequency, antenna size, the dielectric constant of the liquid, and process conditions.
When measuring steam, foam, and condensate, choose low-frequency radar first. In most other applications, choose high-frequency radar first for ease of installation.
1) The lower frequency reduces the sensitivity to steam, foam, and antenna contamination. The wave velocity angle of low-frequency radar is wider. It can better deal with the problems of steam, dust, condensation, pollution, and turbulent surfaces. 2) The higher frequency can minimize the impact on the nozzle, tank wall, and interference.
Application of 80G radar level sensor in liquid level measurement with stirring and strong steam
The micro-powder business department of a chemical plant has a variety of tanks, with a field measuring a range of 25 meters. There is a stirrer and heating device inside, and there is high steam when feeding.
As shown in the figure below, when the staff opened the observation cover, strong steam could be seen coming out.
A guided wave radar level gauge is selected before the scene. However, guided wave radar is easily affected by factors such as the corrosiveness of the measuring medium and the viscosity of the medium, and the measurement effect is not good.
Later, the customer chose the 80G radar level meter, and the historical trend chart after use is as follows. It can be seen that the liquid level of the four 80G radar level gauges installed on-site can be measured well in several loading and unloading processes.
Why do we have to choose an 80G millimeter-wave radar level gauge for liquid level measurement under high steam and stirring conditions? Can the 26G radar level gauge measure?
Explain briefly. The 80G radar level gauge has a high transmission frequency, has good penetration, and is not affected by steam.
The launch angle of 3° can effectively avoid the interference of the stirring blade;
The unique echo tracking algorithm (echo locking function) avoids reading multiple echoes when the material level is high.
However, when the 26G radar level gauge is in a high-steam environment, the radar wave cannot penetrate the steam or the echo is greatly weakened after the radar wave reaches the interface of the medium, and the measurement is unstable;
In addition, the launch angle of the 26G radar level gauge is generally above 20°, so that the radar wave is easily affected by the stirring blade, causing false alarms;
And when the material level is high, there is no internal steam and the range is large, the echo is very strong, and it is easy to read multiple echoes.
Therefore, the 80G radar level gauge can be selected to obtain a good measurement effect for liquid level measurement under high steam and stirring conditions.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Petrol flow meters are often used for inline monitoring of gasoline flow rates. Positive displacement & Turbine flow meters are commonly used industrial fuel flow meters.
Petrol is also called industrial gasoline. As industrial gasoline, it can be divided into industrial solvent gasoline, extraction solvent gasoline, rubber industrial solvent gasoline and so on. Liquid turbine flowmeter and oval gear flowmeter are generally used to measure gasoline.
Sino-Inst offers a variety of petrol flow meter for flow measurement. If you have any questions, please contact our sales engineers.
Volumetric Flow Meter is a mechanical instrument used to measure the volume flow of fluids. A volumetric flow meter is an instrument which can measure either directly or indirectly the volume of a substance which is passing through a specific location in a set period of time. The main advantage of these types of flow meters is that they can handle high viscosity and corrosiveness fluid.
Turbine flow meters are velocity flow meters, also called impeller flow meters. Can be used to measure the instantaneous flow and cumulative flow of liquids and gases.
Turbine flowmeters are widely used in flow measurement: petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, coal gas and cryogenic fluids. Turbine flowmeter signals can be divided into pulse signals or current signals (4-20mA). It is suitable for use with secondary display, PLC, DCS and other computer control systems.
Coriolis flow meter is also called Coriolis mass flow meter. Based on the principles of Micro motion mechanics. Coriolis meters provide extremely accurate mass or volume flow, density and temperature measurement.
Industrial Petrol/Diesel Quantitative Control Systems
Dosing control systems are widely used for dosing process control of fluid media, filling, proportioning, packaging and other metering equipment. Together with various flow meters, they can measure, calculate, convert, display, record, communicate and control the flow and process of flowing liquids. It can greatly improve the efficiency of industrial production and reduce production costs. It has to be said that it is the gospel of industrial production control.
As workers’ wages continue to rise, automatic control has become the trend.
Intelligent digital display quantitative control instrument is one of the items that many enterprises will use or need to improve at present.
For the traditional controller dosing control system in the production process of complex work, poor precision and other shortcomings. It is developed and produced with PLC as the main body and touch screen or LCD as the auxiliary dosing control box. It has many advantages such as easy to operate and learn, good working stability and powerful function. It can directly replace manual dosing, manual dosing, and the accuracy is better than manual. At the same time, this system has the characteristics of intuitive display, manual control or automatic control combination.
Industrial Petrol/Diesel Quantitative Control Systems are especially suitable for oil blending, water blending, chemical blending, dosing, water injection and quantitative or steady flow control of various liquids, gases or steam. It is especially suitable for enterprises that still use manual operation for tank filling/batching/dosing and do not want to invest too much cost, but want to improve the working efficiency.
If you want to divide the flow meter into three categories. I think it can be divided into volumetric flowmeters, mass flowmeters, and velocity flowmeters.
Industrial Fuel oil flow meters measure the volume or mass of fuel oil. Can realize the mutual conversion of volume and mass.
The main industrial oils are hydraulic oil. Gear Oil. Turbine oil. Compressor oil. Refrigeration oil. Transformer oil. Cylinder oil, heat treatment oil, heat transfer oil, etc. Of course, edible oil can also be produced in the industry. In addition, there are greases with lubricating oil as base oil and thickening agent.
Therefore, whether it is a company that uses, trades, or produces oil, it needs to accurately measure the oil flow.
There are many common oil flow meters, such as turbine flow meters, positive displacement flow meters, gear flow meters, mass flow meters, etc.
Positive displacement flow meters and turbine flow meters are often used as gasoline flow meters because of their high accuracy and repeatability and their ability to directly measure the volume of gasoline.
Fuel flow meter refers to a type of flow meter that can measure the volume flow or mass flow of fuel in the pipeline with high accuracy. For example, turbine flow meters, elliptical gear flow meters, etc.
Normally, our fuel flow meters have a local display. In particular, digital fuel flow meters can display both instantaneous and cumulative flow rates. Alternatively, you can use the flow rate calculation tool: Flow Velocity & Pipe Diameter to Volumetric Flow Rate Calculator
The gasoline pump measures fuel by using a gasoline flow meter (e.g. PD flow meter, turbine flow meter). The operator sets a set value based on currency/liter. The flow meter instantly calculates the volume by splitting it into smaller volumes. and ultimately measures the number of liters of fuel dispensed.
Air mass flow meter (abbreviated as MFM) is used for precise measurement of gas mass flow.A gas mass flow controller (abbreviated as MFC) is used for precise measurement and control of gas mass flow. Related products What is a mass flow meter? Air mass flow meter, namely Mass Flow Meter (abbreviated as MFM). It is an instrument for accurately measuring gas flow. The measured value is not inaccurate due to temperature or pressure fluctuations. No temperature pressure compensation is required. Guess…
Analog flow meter The analog flow meter is a flowmeter with the analog output signal. Analog output is a common function of flow meters. The analog signal is mainly used to output the flow signal to the next control system. Featured analog flowmeters Analog water flow meter Analog air flow meter Analog gas flow meter Analog diesel flow meter Read more about: Industrial flow meters for Different industrial applications FAQ Guess you like: Insertion Magnetic Flow Meter-Large diameter online install You…
What Is Digital Air Flow Meters? The digital air flow meter is also a digital gas flow meter. The digital air flow meter can measure and display parameters such as mass flow, volume flow, gas temperature, atmospheric pressure and gas pressure of air or other gases. Such as argon, hydrogen, nitrogen, etc. A digital air flow meter is different from a mechanical gas flow meter. The first is because of the local digital display. For example, a vortex flowmeter, or a…
Low cost 3″ Water Meter 3″ water meter is also DN80 water meter. Easy to read. Totalizing water volume. Intelligent large-caliber remote water meter includes wired remote transmission and wireless remote transmission. RS485 communication equipment, MODBUS, etc. Features of 3″ Water Meter Extended Reading: Clamp on Water Flow Meter 3″ water meter flow rate Caliber(mm) Inch Measurement grade Q3/Q1 m³/h Overload flow Q4m³/h Common flow Q3m³/h Boundary flow Q2m³/h Minimum flow Q1m³/h Minimum readingm³ Maximum reading 50 2 50 31.25 25 0.8…
Sino-Inst offers a variety of Digital gas flow meters for flow measurement. If you have any questions, please contact our sales engineers. Featured Digital gas flow meters for Sale Are you looking for a flow meter for measuring gas volume or mass flow? For Air-O2-N2-CO2 etc. Every day, in the production process, the production or consumption of various gases may need to be metered. Accurate gas measurement is important work. Sino-Inst offers volumetric or mass flow meters available for various gases.If…
CO2 flow meters are instruments that can measure the flow of gaseous or liquid carbon dioxide. CO2 is a common industrial gas, and effective measurement is very important. Sino-Inst offers a variety of CO2 flow meters for flow measurement. If you have any questions, please contact our sales engineers. CO2 gas flow meter Vortex flow meters and gas turbine flow meters are the most commonly used carbon dioxide flow meters. In addition to vortex and gas turbine flowmeters, we mainly recommend…
Oxygen Flow Meters are digital flow meters that can measure industrial oxygen. It is very important to choose a suitable flow meter to measure and monitor the oxygen flow. Sino-Inst offers a variety of Industrial Oxygen Flow Meters for flow measurement. If you have any questions, please contact our sales engineers. Featured Industrial Oxygen Flow Meters for Sale Extended reading: Flow Totalizer F3000X for Data collection and calculation Applications of industrial oxygen Industrial oxygen generally only requires oxygen purity, and has…
Biogas Flow Meters are instruments that can measure the flow of biogas. Could be a vortex flow meter, thermal mass flow meter, etc. Commonly used in biogas stations, biogas production fermentation tanks, etc. Sino-Inst offers a variety of Biogas Flow Meters for flow measurement. If you have any questions, please contact our sales engineers. renewable energy source-biogas At present, the use of biogas is mainly concentrated in three major fields: rural areas, aquaculture, and industry. Utilization of rural biogasThe comprehensive utilization…
Sino-Inst offers a variety of Digital Beer Flow Meters for flow measurement. If you have any questions, please contact our sales engineers. Featured Beer Flow Meters for Sale More about: Sanitary Flow Meters for Sale The Use of Beer Flow Meter in Beer Production Process In the main technological process of beer production. For effective control in the production process. It is necessary to measure and control the intermediate raw materials – wort, sake in semi-finished products, raw juice wine in…
LPG flow meter is used for flow measurement of liquefied petroleum gas. The flow measurement of LPG is very important in industrial production, transportation and trade settlement. Sino-Inst offers LPG/propane gas flow meter at competitive low price from China gas flow meter manufactures. If you have any questions, please contact our sales engineers. Featured LPG Flow Meters for Sale Extended reading: Gas Mass Flow Meter Features of LPG LPG refers to petroleum gas liquefied at high pressure or low temperature, referred…
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Featured Inline Air Flow Meters Inline air flow meter units conversion Inline air flow meter cfm CFM is a common imperial flow unit, cubic feet per minute.For a certain volume of air flow passing in a unit time, m3/h air volume unit is generally used in China. Other countries also use the British air volume unit cfm (cubic foot per minute). That is ft3/min cubic feet/minute,1CFM=28.316846592 L/MIN=0.028316847 m3/min CFM traffic is divided into SCFM and ACFM. Extended reading: [Working principle&Price]SI3051ANB Annubar…
What is a fuel flow meter? The fuel flow meter is an instrument that can monitor fuel flow. Industrial Fuel is an important energy source. For example, diesel, marine fuel, gasoline, etc. Sino-Inst offers a variety of Fuel Flow Meters for flow measurement. If you have any questions, please contact our sales engineers. Featured inline fuel flow meters for sale Common Industrial Fuel Fuel oil refers to light distillate fuel oil and heavy distillate fuel oil obtained after crude oil is…
Sino-Inst is a manufacturer of Industrial Petrol Flow meters. We offer more than 20 types of Industrial Petrol Flow meters, 40% are turbine flow meter, 30% are mechanical fuel flow meters and the rest.
Industrial Petrol Flow meters can be stable flow measurement without modifying the pipeline. This greatly meets the measurement needs of many applications.
Our Industrial Petrol Flow meters solutions are brought together here to allow you to choose from a variety of flow rates or technologies. The most common types are mechanical or digital readout fuel meters. When it comes to technology, either turbine or oval gear diesel flow meters can be purchased directly from our website.
Sino-Inst’s Industrial Petrol Flow meters, made in China, have good quality, with better prices. Our flow measuring instruments are widely used in China, India, Pakistan, USA and other countries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is Industrial Petrol Flow meters, level sensors, or other equipment, please give us a call.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Cheap flow meters means to choose the lowest cost flow meter while satisfying your measurement needs. How to choose the lowest cost flow meter?
Cheap flow meters are not equal to any flow meter. Different flowmeters are required to measure air velocity, water, and other liquids. For example, if you need to measure water flow rate, electromagnetic flow meters and ultrasonic flow meters are more suitable. On top of this, let’s choose a low-cost configuration.
The measurement of water flow is the most widely used method in industrial production. Raw water, domestic sewage, industrial wastewater, etc. all need to be monitored. So how to choose a low-cost water flow meter?
Here, Sino-Inst proposes the following suggestions for you based on experience:
If it is measuring drinking water, beverages, etc. Sanitary electromagnetic flowmeters can be used. Meet the requirements of drinking and hygiene.
If it is industrial wastewater or corrosive liquid, you can choose electromagnetic flowmeter. Choose the lining made of tetrafluoroethylene and the electrode of 316L, which can resist corrosion.
If it is residential water, you can use an ultrasonic water meter. Simple to use. low cost.
If it is a short-term measurement requirement, or for convenience, you can choose an external ultrasonic flowmeter. The host can be handheld or wall-mounted, and the cost is extremely low. And can be applied to different pipe diameter measurement.
Of course, the above is only Sino-Inst’s suggestion. In order to choose the right water flow meter, you can contact our sales engineer. According to your measurement medium, pressure, pipe diameter, use function, accuracy and all requirements, choose the best cost flowmeter.
Mechanical water flow meters refer to a type of flow meter suitable for clean water processes or applications. The working principle of a mechanical water flow meter is to measure the speed of water flowing through a pipe. This causes the piston or turbine to rotate. The volume flow of water is proportional to the rotation speed of the blades. Compared with electronic water flow meters, mechanical water flow meters may become clogged when the water is dirty or contains large particles. When the water flow is low, the mechanical water meter does not work well.
Ultrasonic flow meters, especially clamp-on ultrasonic flow meters, have a very high cost performance. Especially compared to large diameter pipes. For example: measuring water in large diameter pipes. Either an electromagnetic flowmeter or a turbine flowmeter can be used. But their costs are not low. At this time, the cost of the clamp-on ultrasonic flowmeter will be much lower.
There are 4 types of gas flow meters commonly used in industrial production and trade calculations. They are vortex flowmeter, precession vortex flowmeter, rotameter, differential pressure flowmeter, etc.
The cost of these gas flow meters is different. It is necessary to select the appropriate model according to the actual measurement parameters and confirm the cost.
Flow meters are classified into liquid flow meters and gas flow meters according to the medium. Then the common liquid flow meters mainly include: vortex flowmeter, turbine flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, differential pressure flowmeter, open channel flowmeter, Coriolis mass flowmeter, etc.
Digital Fuel Flow Meter is a flow meter dedicated to measuring fuel, diesel, gasoline, and petroleum. Digital Fuel Flow Meter generally has a digital display or signal output. Such as pulse or 4-20mA. Such as turbine flow meters, gear flow meters. It can be used to measure the pipeline flow of oil medium storage, transportation, trade, etc. Different pipelines and working conditions require flow meters with different principles or functions. Next, we will analyze in detail.
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.
There are four 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.
Low Flow Meters refer to those flow meters that can be used to measure micro-flow-low-flow rate media. Including metal rotor type, gear type, electromagnetic type microflow meter, microturbine type, and thermal type small mass flow meter. It can measure the Low flow rate of a variety of liquids and gases. For example, it needs small volume, high-temperature resistance, low-temperature resistance, or medium viscosity. etc. We all have suitable product recommendations.
Generally speaking, the accuracy of Coriolis mass flow meters is relatively high. High precision: standard configuration ±0.2%, ±0.1%, ±0.05% optional. However, general industrial liquid flow measurement does not require such high accuracy. An accuracy of 0.5% or 1% is sufficient. You can choose the appropriate flowmeter according to the measurement requirements. Extended reading: Micro flow meters for low flow liquids
Generally, it needs to be measured according to the measured medium, use environment, installation method and other aspects. If it is ordinary non-corrosive water, it is USD300-500. The specific decision is based on different site conditions. The price of electromagnetic flowmeters is determined according to the measured medium. Different mediums, ranges, installation methods, and prices will vary greatly.
Sino-Inst offers over 30 Cheap flow meters-Low Cost products. About 50% of these are differential pressure flow meters. 40% are water meters (like the Insertion Turbine Flow Meter), and 40% are water treatment (like the Annubar flow meter ).
A wide variety of Cheap flow meters-Low Cost options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Cheap flow meters-Low Cost, located in China.
The top supplying country is China (Mainland), which supply 100% of the Cheap flow meters-Low Cost respectively.
Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Cheap flow meters-Low Cost 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.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
