What is a Thermal Mass Flow Meter ?

The thermal mass flow meter is also called Thermal mass flow sensors, or thermal gas flow meters. The thermal mass flow meter is a meter that uses the principle of heat transfer to detect flow.

That is, the measurement is performed based on the heat exchange relationship between the flowing fluid and the heat source (the object heated outside the fluid or the heating body outside the measuring tube).

The main measurement gas. Thermal gas mass flow meters are mainly divided into two categories, namely: thermally distributed and immersed (or plug-in).

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Thermal mass flow meter working principle

Thermal gas mass flow meter is designed on the basis of thermal dispersion. And adopts method of constant differential temperature to measuring gas flow. It has advantages of small size, easy installation, high reliability and high accuracy, etc.

The meter contains two platinum resistance temperature sensors. The thermal principle operates by monitoring the cooling effect of a gas stream as it passes over a heated sensor. Gas flowing through the sensing section passes over two sensors. One of which is used conventionally as a temperature sensor, whilst the other is used as a heater. The temperature sensor monitors the actual process values whilst the heater is maintained at a constant differential temperature above this by varying the power consumed by the sensor. The greater the gas velocity, the greater the cooling effect and power required to maintain the differential temperature. The measured heater power is therefore a measure of the gas mass flow rate.

The format of gas velocity and power is shown as below:

Where:

• ρg is the specific gravity of the medium
• V is velocity
• K is the balance coefficient
• Q is heater power
• Δ T is a differential temperature
• The medium temperature range of the meter is -40℃～220℃.

In the format (1), the specific gravity of medium is related to the density:

Where:

• ρg is the medium density in working condition（kg/m3）
• ρn is the medium density in standard condition, 101.325kPa, and 20℃ （kg/m3）
• P is the pressure in working condition（kPa）
• T is the temperature in working condition （℃）

In the formats (1) and (2), there is a certain functional relationship between the velocity and pressure in working condition, medium density, the temperature in working condition.

Due to the sensor temperature is always 30℃ higher than the medium temperature (environment temperature), and the meter adopts the method of constant differential temperature, therefore the meter do not need to do temperature and pressure compensation in principle.

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Know more about How Thermal Mass Flow Meter Technology Works?

Video source: https://www.youtube.com/watch?v=YfQSf2NBGqc

Thermal mass flow meter applications

The thermal measuring principle is widespread in the industry, and is being used successfully in many applications with gas flow, for example:

• Oxygen, nitrogen, hydrogen, chlorine, and multi-component gas measurement.
• Blast furnace gas and coke oven gas measurement.
• Flue gas measurement.
• Aeration and chlorine measurement in biogas and water treatment.
• Compressed air measurement.
• Gas flow measurement for natural gas, liquefied gas, flame gas, etc.
• Primary air and secondary airflow measurement of power plant blast furnace
• Flow measurement of underground ventilation or exhaust system

Further reading: Industrial LPG/Propane flow meter

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

FAQ

What are the different types of thermal flow meters?

Thermal mass flowmeters can be divided into contact and non-contact types according to different heat sources and temperature measurement methods.

1. Contact thermal mass flow meter

The heating element and temperature measuring element of this mass flowmeter are placed in the pipe of the fluid to be measured. In direct contact with the fluid, it is often called Thomas flowmeter. It is suitable for measuring the larger mass flow of gas. Due to heating and measuring elements Direct contact with the measured fluid, so the components are susceptible to fluid corrosion and wear. It affects the measurement sensitivity and service life of the instrument. It is not suitable for measuring high flow rate and corrosive fluid, which is the shortcoming of contact type.

2. Non-contact thermal mass flow meter

The heating and temperature measuring components of this flowmeter are all placed outside the fluid pipeline. They do not directly contact the measured fluid. Overcoming the shortcomings of contact.

Extended reading: Gas mass flow controller working principle

What is the mass flow rate?

Mass flow rate refers to the flow rate of fluid quantity expressed by mass.
The mass flow rate can be expressed by the formula: qm=m/t=ρ×u×A.
In the formula, QM is the mass flow rate, kg/s.
m is the unit fluid mass, kg.
ρ is the fluid density, kg/m3.
t is the unit time, s.
u is the average flow velocity in the pipe, m/s.
A is the cross-sectional area of ​​the pipeline, m2.

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

Read more about: Coriolis Mass Flowmeter Working Principle

Mass flow vs volumetric flow?

Mass flow rate vs Volumetric flow rate is what we must use in flow measurement and control. In this post, we compare the concept of volume flow and mass flow and the conversion between the two.

Commonly used flow meters, such as orifice plates. Turbine flowmeter. Vortex flowmeter. Electromagnetic Flowmeter. Rotameter. The flow measurement value of ultrasonic flowmeter and oval gear flowmeter is the volume flow of fluid. Coriolis mass flow meters and thermal gas mass flow meters measure mass flow.

Read more about: New Guide: Mass Flow Rate vs Volumetric Flow Rate

Gas mass flow controller

The gas mass flow controller is based on the principle of thermal mass flow measurement. With control valve. The Micro Gas Flow Controller (MFC) is used to precisely measure and control the mass flow of gas.

Read more about: Gas mass flow controller working principle

Air mass flow meter VS Controller

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Related Products:

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

A wide variety of Thermal Mass Flow Meters options are available to you, such as free samples, paid samples. All of our flow meters can work with the AMS NEW TREX. About 13% of these are magnetic flow meter. 14% are Insertion Magnetic Flow Meter. 25% are Venturi flow meter. 13% are Handheld ultrasonic flow meter, and others are Liquid Turbine Flow Meters.

Sino-Inst is Thermal Mass Flow Meter suppliers, located in China. Mass flow meter products are most popular in North America, Mid East, and Eastern Europe.

The United States, and India, which export 99%, 1%, and 1% of Thermal Mass Flow Meter respectively.

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

KimGuo11

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.

drurylandetheatre.com

What is a variable area flow meter?

Variable area flow meters are flow meters in which the fluid must pass through a restricted area. Because the flow cross-sectional area of ​​the flow meter varies with the height of the float. Therefore, this type of flowmeter is called variable area flowmeter or equal pressure drop flowmeter. The typical instrument of this type of flowmeter is a rotameter. This is in contrast to flow meters such as orifice plates and venturi tubes, where the area of ​​the flow element remains fixed. Variable area flowmeters can measure of gas and fluid flow.

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Variable area flow meter principle

The principle of the variable area flowmeter is to keep the pressure drop constant and use the change of the throttle area to measure the flow rate. It consists of a tapered tube gradually expanding from bottom to top and a rotor or float placed in the tapered tube.

When the fluid flows through the tapered tube, the float in the tube is pushed up to a height corresponding to the flow rate and floats.

When the flow rate increases, the impulse acting on the rotor increases. Because the weight of the rotor in the fluid is constant. The rotor rises. The corresponding annular gap between the rotor and the tapered tube is also increased. The flow rate of the fluid flowing through the annulus decreases. Impulse is also reduced. Bring the rotor to balance in the new position. According to the float position of the rotor, the instantaneous flow value can be measured.

The advantages of area flow meters are simple structure, easy testing, and suitable for measuring small flow rates.

Its disadvantage is that it is easily affected by factors such as fluid density, pressure and viscosity. When testing the flue gas flow, because the flue gas contains dust, the area flowmeter cannot be used.

Extended Reading: What Is Metal Tube Flow Meter? Rotameter Manufacturer

Extended reading: Gas Rotameter Tips

Variable area flow meter advantages and disadvantages

• The advantages of the variable area flow meter are simple structure and easy testing, suitable for measuring small flow.
• The disadvantage of variable area flow meter is that it is easily affected by factors such as fluid density, pressure, and viscosity. When testing the flue gas flow, because the flue gas contains dust, the area flowmeter cannot be used.

Extended reading: Integral DP Flow Meter|Gas, liquid, steam|Compact structure

Variable area flow meter types

We can classify according to different product materials. Including the following categories:

Plastic variable area flow meter

The main parts such as the liquid plastic tube rotameter cone tube are made of AS, ABS plastic. Has relatively good corrosion resistance. The product also has the characteristics of reasonable structure, small size, lightweight, and the tapered tube is not easily broken. The plastic tube rotor flowmeter can be widely used in chemical, environmental protection, food, and other industrial sectors.

Glass variable area flow meter

Glass rotor flowmeters are mainly used in various departments such as the chemical industry, petroleum, light industry, medicine, fertilizer, chemical fiber, food, dyes, environmental protection, and scientific research. Used to measure the flow of single-phase non-pulsating (liquid or gas) fluids. The anti-corrosion glass rotor flowmeter is mainly used for the detection of corrosive liquid and gas medium flow. Such as strong acid, strong acid, oxidant, strong oxidizing acid, organic solvent, and other corrosive gas or liquid medium flow detection.

Extended reading: Fluid flow meter types

Metal variable area flow meter

Metal float flowmeter is a kind of flow measuring instrument commonly used in industrial automation process control. It has the characteristics of small pressure loss, large detection range (range ratio 10:1), and convenient use. It can be used to measure the flow of liquid, gas, and steam, and is especially suitable for medium flow measurement with low flow velocity and small flow.

The metal float flowmeter has local display type and intelligent remote transmission type, with pointer display, instantaneous flow, cumulative flow, liquid crystal display, upper and lower limit alarm output, cumulative pulse output, standard two-wire 4-20mA current output, etc. form. Provide users with a very wide choice of space.

Read more about: What is a Flow Meter? Types and how does it work?

Variable area flow meter applications

Because Variable area flow meter has the advantages of simple mechanical structure, convenient processing, stable work, high reliability and low pressure loss. Especially it can measure the characteristics of low Reynolds book small flow medium. Therefore, it is widely used in gas and liquid flow measurement and automatic control systems.

1. It is suitable for the measurement of small-caliber and low-velocity gas, liquid and steam flow.
2. Affected by a certain viscosity, it is not suitable to measure high-viscosity media
3. When the flow rate exceeds 100m3/h, the pressure loss is large.
   Mostly used for process control instruments, the best accuracy is 1%, generally 1.5%, and the range ratio is 10:1
4. It is not suitable for measuring medium with large density change. It is not suitable to measure the flow of pulsating medium (such as metering pump outlet).

To put it bluntly, even under the conditions of small flow rate, small diameter, low flow rate, low viscosity medium, and no magnetic coupling influence, the variable area flow meter is the best to use.

In addition, the installation of a Variable area flow meter is also very particular. For flow accuracy requirements too high, it is not suitable to use this flow meter!

Read more General-purpose Flow Totalizer for Data collection and calculation

Extended reading: non contact flow meter

Horizontal variable area flow meter

There are two installation directions for variable area flow meter: horizontal installation and vertical installation.

Horizontal installation is divided into left in and out, right in and out.

Vertical installation is divided into top in and bottom out, bottom in and top out.

This one is installed horizontally to measure nitrogen. It is purely mechanical to display instantaneous flow rate.

Read More about: What is the difference between rotameter and flowmeter?

Metal tube variable area flow meter

The metal tube variable area flowmeter is our rotameter.

The LZ series Rotameter Flowmeter provided by Sino-Inst adopts a 304/316 stainless steel structure. It can be used to measure the flow of liquid, gas and steam. Especially suitable for low flow velocity and small flow. Flow measurement of high temperature, high pressure, strong corrosion, conductive or non-conductive media.

Extended reading: Micro flow meters for low flow liquids

Vortex Flowmeter VS Rotameter

Vortex flowmeter and rotameter are two different flowmeters. The working conditions and use environments measured by each flowmeter are different. Therefore, the two flowmeters have their own advantages and disadvantages.

Rotameter is also called metal tube rotameter, which uses variable area measurement principle. Suitable for measuring liquid, gas and other measuring media. Its body uses all-metal structure. There are indication type, remote transmission type and explosion-proof type. Rotameter has 4-20mA standard analog quantity signal output and on-site indication. Especially its body is pointer type. This big advantage can be measured even without power. Widely used in power generation, pharmaceuticals, water treatment, etc.

Extended Reading: What is difference between rotameter and flow meter

The vortex flowmeter has two measurement types: the basic type and the temperature and pressure compensation integrated type. The basic model only measures a single flow rate. The temperature and pressure compensation type is a flow type that can measure temperature and pressure at the same time. The vortex flowmeter also has many advantages. It has the advantages of small pressure loss, large measuring range, high precision, and because the vortex flowmeter has no moving parts. Therefore, maintenance and installation are very simple.

Extended reading: How does a rotameter work

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Read more about: Flow Meter Selection Guide

Sino-Inst offers over 5 Variable area flow meters, with the Best Price.

A wide variety of Variable area flowmeters options are available to you, such as free samples, paid samples.

Sino-Inst is Variable area flowmeter supplier, located in China.

Variable area flowmeters products are most popular in North America, Mid East, and Eastern Europe.

The United States, and India, which export 99%, 1%, and 1% of Variable area flowmeters respectively.

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

KimGuo11

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.

drurylandetheatre.com

The ultrasonic water flow meter is a meter that measures water flow by detecting the effect of water flow on ultrasonic beams (or ultrasonic pulses). The more commonly used methods are the time difference method and the Doppler method.
The time difference method can measure water, seawater, acid and alkali, edible oil, gasoline, alcohol, and other uniform liquids that can transmit and transmit ultrasonic waves.
If it is sewage, which contains impurities, bubbles, etc., an ultrasonic flowmeter based on the principle of the Doppler method is used.

RFQ More water meters

Ultrasonic water flow meter types

According to the measurement principle

• Time difference method ultrasonic flowmeter;
• Frequency difference method ultrasonic flowmeter;
• Phase difference method ultrasonic flowmeter;
• Doppler ultrasonic flowmeter;
• Ultrasonic flowmeters for partially full pipes and river channels that combine liquid level measurement and average flow velocity measurement.

According to the way of use

• Portable ultrasonic flowmeter;
• Fixed (standard pipe section) ultrasonic flowmeter.

According to the installation method of the transducer

• Standard pipe section ultrasonic flowmeter;
• Clip-on ultrasonic flowmeter;
• On-site hole-opening Insertion Type Ultrasonic Flow Meter.

According to whether the transducer is in contact with the fluid

• Intrusive (contact) ultrasonic flowmeter;
• Non-invasive (non-contact) ultrasonic flowmeter.

According to the nature of the measured fluid

• Liquid ultrasonic flowmeter;
• Gas ultrasonic flowmeter.

According to the number of transducer channels

• Mono ultrasonic flowmeter;
• Two-channel ultrasonic flowmeter;
• Multi-channel ultrasonic flowmeter.

Extended reading: 2 inch Water Flow Meter

Ultrasonic water flow meter working principle

Ultrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe.

At no flow conditions, the frequencies of an ultrasonic wave transmitted into a pipe, and its reflections from the fluid are the same.

Under flowing conditions, the frequency of the reflected wave is different, due to the Doppler effect.

When the fluid moves faster, the frequency shift increases linearly.

The transmitter processes signals from the transmitted wave, and its reflections to determine the flow rate.

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

Ultrasonic water flow meter advantages and disadvantages

Generally, an ultrasonic flow meter is the device, that uses ultrasound to measure the velocity of liquid flow, that helps in determining the volume of liquid flow also.

The ultrasonic flow meters are made using the ultrasonic transducers, which are clamped to the external surface of a pipe, to generate the ultrasonic pulses through the pipe.

When the liquid flows inside the pipe, it creates the time difference in the pulses, and these are examined to calculate the accurate flow velocity of the liquid.

There are many advantages of using the ULTRASONIC flow meters which include:

• The electronics in the ultrasonic flow meter includes ultrasonic flowmeter detector which compensates and adapts to the changes in the profile of the flow, type of the liquid and material of the pipe.
• A portable ultrasonic flow meter converter can be used as a direct method to determine the flow rates effectively when compared to the other flow systems.
• Ultrasonic flow meter converter is inexpensive to use and maintain when compared to the other mechanical flow meters as they are no moving parts in these flow meters.
• Their design is highly sophisticated and they do not obstruct the liquid flow, so they can be used for sanitary, corrosive and abrasive liquids.

These are the advantages of the ultrasonic flow meters and there are many disadvantages of the Ultrasonic flow meter which include:

• The main disadvantage of the ultrasonic flow meter is the cost. The cost of the flow meter is very high when compared to the other types of mechanical flow meters.
• The ultrasonic flow meters are sophisticated when compared to the mechanical flow meters, so it needs experts to repair and maintain the flow meters.

These are the advantages and disadvantages of the ultrasonic flow meters.

Extended Reading: Inline Ultrasonic Flow Meter

Ultrasonic water flow meter accuracy

The accuracy of Ultrasonic water flow meter supplied by Sino-Inst is 1%. Can meet most of the measurement needs.

Extended reading: Industrial VS Residential inline water flow meters

Ultrasonic water flow meter clamp-on

Ultrasonic Clamp-on Flow Meter is composed of an integrated host and external clamp-on sensors. Clamp-on Flow Sensors are available at room temperature and high temperature.

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

Clamp on Flow Meter Reference price: USD 470.00/pc

Extended reading: Make Ultrasonic Open Channel Flow Meter Work for You

Portable ultrasonic flowmeter for water

A handheld Portable ultrasonic flow meter realizes the non-contact measurement of liquid flow. Also often referred to as Portable Clamp-On Ultrasonic Flow Meter for Liquids.

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

Handheld Portable Ultrasonic Flow Meter Reference price: USD 470.00/pc

Extended reading: Typical Applications of Handheld Ultrasonic Flow Meter

Extended Reading: Chilled Water Flow Meter

Ultrasonic flowmeter for gas

Ultrasonic Gas Flow Meter uses the principle of measuring the transit time of ultrasonic waves in the pipeline. Ultrasonic Gas Flow Meter is an ideal choice for various gas measurements.

The gas ultrasonic flowmeter is suitable for blast furnace gas, converter gas, coke oven gas, mixed gas, gas, compressed air, chlorine, nitrogen and other industrial gases. Suitable for large-caliber gas measurement, suitable for low flow rate, pulsating flow gas measurement. It has the advantages of not being affected by gas components, dirt resistance, fast response, wide range, high precision, good stability, and less maintenance.

Featured Ultrasonic water flow meters

Extended reading: Insertion Ultrasonic Water Flow Meter – Designed for Agricultural Irrigation, Garden Management

Why is it more appropriate to use a Doppler ultrasonic flowmeter to detect sewage pipes?

What kind of flow monitoring equipment should you choose for ordinary sewage pipes?

What kind of flow monitoring equipment should we choose for ordinary sewage pipelines?

The electromagnetic flowmeter can only measure the condition of the full tube. Therefore, the measurement result will be unstable when the tube is not full. Because the non-full tube state can be understood as an extreme situation in which a large number of bubbles exist in the measured liquid medium.

There are two situations when the pipe is not filled with liquid. One is that the liquid level is higher than the level of the electrode. The other is lower than the level of the liquid being measured.

When the liquid level in the pipe is higher than the electrode level. If the front and back straight sections of the pipeline are in an ideal state at this time. Generally, the precision data measured by electromagnetic flow is relatively stable. However, because the flow meter liquid contains the gas volume in the pipeline, there is undoubtedly a large measurement error in this measurement state.

When the electrode is higher than the level of the electrode, the electrode is exposed in the air at this time. The measurement circuit is actually in an open state, and the electrode cannot directly contact the liquid. The value and output are in a random state. If the electrode is constantly shaking or full, the electrode will not work normally, and the measurement will not be carried out.

The measurement of the intelligent electromagnetic flowmeter is not only inaccurate, but also damages the electrodes.

However, many sewage pipes are caused by partial pipes. Only when it rains does the tube become full. So what kind of flow measurement method is the most appropriate in such a situation?

At present, the most advanced technology in China is the use of a Doppler ultrasonic flowmeter. Such as rain and sewage pipes. It can accurately monitor the water level, flow rate, flow rate and instantaneous flow rate, cumulative flow rate, water temperature, and other data. It can be refreshed in real-time, and the installation is very simple.

Extended reading: Ultrasonic flow detectors types

You may like:

Sino-Inst, Manufacturer for Ultrasonic water flow Meter. It can measure a single sound-conducting liquid medium of DN 15—150mm. It can measure even liquids such as water, seawater, oil, and slurry.

Sino-Inst’s Ultrasonic water flow meters, 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.

Request a Quote

KimGuo11

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.

drurylandetheatre.com

What does a residential water meter look like?

A residential water meter is a legal meter for measuring water consumption in residential communities, residential buildings, bungalows, and other places.

What are the commonly used residential water meters? In terms of functions, there are smart IC card water meters, remote water meters, and smart valve-controlled water meters. Below, we will briefly introduce these common and commonly used residential water meters!

RFQ

More meters

Residential Water Meters Types

The types of water meters can be divided by the principle of measurement. The common types are mechanic water meters, mechanical water meters equipped with electronic devices, and electronic water meters.

Read more about Everything You Need To Know About Electronic Flow Meters

Their working principles are as follows:

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.

Extended reading: Industrial VS Residential inline water flow meters

b) Mechanical water meter with electronic device:

Keep a mechanical water meter with a complete structure. On this basis, a water meter with an electronic device is installed. There are mainly IC card water meters and remote water meters. 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 it into the calculator. Both the calculator and the indicating device are electronic components. Such as vortex (impeller) wheel type electronic water meter.

Extended Reading: 3 inch (3″) 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.

Extended reading: Advantages and disadvantages of ultrasonic water meters

Read More about: Chemical Flow Meter Guide

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Extended Reading: LORA water meter

Where is the Residential water meter installed?

In order to be beautiful and save space, water meters are generally installed in their own kitchens. Some of them will be installed in the corner of the kitchen or covered by other kitchen furniture.

However, in order to facilitate the reading of the water meter, it is best to install the water meter in a conspicuous position.

If the house has a special type, it may be installed outdoors.

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

Precautions for installation of Residential water meter

1. If it is to install a water meter on a new pipeline. You have to rinse all the stolen goods in the pipeline first. This will prevent the water meter from slowing down or not moving in the later stage.
2. It is better to install a filter before the water meter is installed. Before installing other instruments in the pipeline, the debris in the pipeline should be cleaned up. Avoid clogging of pipes.
3. When installing, keep the direction on the watch case consistent with the direction of the water flow. And the place where the water meter is installed. The location should be convenient for us to read or change later. The place where the water meter is installed should not be installed in a place exposed to the sun and freezing.
4. When the water meter is installed, the reading side should be facing up.
5. The direction of the arrow on the water meter should be the same as the direction of the water flow in the pipe.
6. If the water meter is installed outdoors, it must be protected against sun and frost. Because the outdoor environment is better than the indoor environment. If the water meter is exposed to the sun or cold for a long time, the service life of the water meter will be affected. If the gear of the water meter is exposed to the sun for a long time. It will cause deformation and damage. This will affect the accuracy of water meter measurement.

Extended reading: Beginner’s Guide: Variable area flow meter

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Extended Reading: Chilled Water Flow Meter

Sino-Inst offers over 30 residential water meter products.

A wide variety of residential water meter options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of residential water meter, located in China.

The top supplying country is China (Mainland), which supply 100% of the residential water meter respectively.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. residential 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.

KimGuo11

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.

drurylandetheatre.com

Application

What is a Chilled Water Flow Meter?

A chilled water flow meter refers to a flow meter that can be used to measure low-temperature water. Common chilled water flow meters include electromagnetic flow meters, turbine flow meters, and ultrasonic flow meters. Used in the condensing system, chiller, or HVAC.

RFQ More flow meters

Chilled Water Flow Meter Types

There is no best water flow meter, only the most suitable water flow meter. Because the application details of each pipeline are different. According to the actual measurement situation, select the most suitable flowmeter. Can save a lot of time and cost.

Featured Chilled Water Flow Meters

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

What are the limitations of electromagnetic flowmeters at low temperatures?

Electromagnetic flowmeter transmitters are bound by two aspects when measuring cryogenic media.

Can ultrasonic flowmeter measures chilled water flow?

1. Ultrasonic flowmeter can measure flow. The temperature does not exceed -40℃~160℃. It is required to have a full tube and a uniform medium. It can display instantaneous flow, flow velocity, accumulated flow, accumulated running time, etc.
2. Ultrasonic calorimeter can measure heat supply, flow and temperature monitoring. Air conditioning heating and cooling capacity measurement.

When you place an order, you can specify whether it is to measure flow or heat. We will help you choose the model.

Extended reading: Industrial VS Residential inline water flow meters

How to measure the chilled water flow of the chiller?

The following is our experience sharing: Freezer chilled water flow measurement techniques. Hope it can be helpful to you.

1.Water pressure detection of the water inlet and outlet pipes of the freezer

Through the detection of the return water pressure and the outlet water pressure value. Check the water flow rate of the freezer under the pressure difference between the inlet and outlet water in the random manual of the freezer.

By referring to the corresponding table or diagram of the unit’s water flow in the manual. So as to determine whether the freezer system is normal.

And through this difference to determine which section of the water pipeline has a higher resistance value. And make corresponding rectification plans and actions.

Read more: Insertion Type Ultrasonic Flow Meter Applications

2.Detection of the return water temperature and outlet water temperature of the refrigerator (the unit needs to be in normal state)

30 minutes after starting up, check the system or chilled water system inlet and outlet thermometers through the parameters of the unit’s control system.
It can read the inlet water temperature and outlet water temperature when the unit is running. The difference must be about 4-6 degrees.

If the temperature difference between the inlet and outlet water is too large, it means that the water flow of the water system through the plate is too small. This may cause the unit to fail to operate normally or be damaged.

3.Water pump running current detection

By detecting the running current of the refrigerator water pump, it is compared with the rated current. It can be judged whether the actual water flow is larger or smaller than the rated water flow of the pump.

Comprehensive judgment together with the previous parameters. In order to get an exact test and analysis report of the chiller system.

4.Detection of the suction temperature of the compressor copper pipe (only when the refrigeration is running)

If it is 30 minutes after the refrigerating and freezer is turned on

It is detected that the suction temperature of the compressor is lower than 0 degrees. It means that the water flow in the water-side heat exchanger is not enough, which leads to a drop in the evaporation temperature and the evaporation pressure.

And cause Freon is still evaporating and absorbing heat in the suction pipe that flows from the evaporator to the compressor. Will cause the compressor suction temperature to be lower than 0 degrees.

In addition, it is necessary to eliminate the drop in evaporation pressure and evaporation temperature caused by the water temperature set point being too low.

The non-standard low water temperature unit can be considered normal as long as the compressor has a suction superheat of 6-8℃.

So under normal water flow. The suction temperature of the compressor is generally greater than 0°C. Below this value, water system problems need to be ruled out.

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Sino-Inst offers over 50 Chilled Water Flow Meter for flow measurement. About 50% of these are magnetic flow meters, 40% is the turbine flow sensor, and 20% are Ultrasonic and mass flow meter.

A wide variety of 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.

KimGuo11

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.

drurylandetheatre.com

Selection Guide

What is a mechanical flow meter?

Mechanical flow meters are a type of flow meters that use arrangement moving parts to measure flow. The fluid passes through a series of gears or chambers (positive displacement or PD) or through a rotating turbine or rotor. Mechanical flowmeter is different from electromagnetic and ultrasonic in principle. Mechanical flow meters easily monitor liquid flow rates for water, fuels, viscous fluids and more.

RFQ More Flow Meters

Mechanical flow meter types

There are many types of flow meters.

The electromagnetic flowmeter is based on the electromagnetic principle. When a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage.

Ultrasonic flow meters use the principle of ultrasonic acoustics to measure flow velocity. The mechanical flow meter is a relative concept.

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.

Tool: Volumetric Flow Rate & Pipe Diameter to Flow Speed Calculator

Read more about: Beginner’s Guide: Variable area flow meter

Featured Mechanical Flow Meters

Integral DP Flow Meter

Extended reading: High-Temperature Oval Gear Heating oil Flow Meter

Of course, if you are not clear about the principle and difference of the above flow meters. Can not choose the appropriate Mechanical Flow Meters. Then, you can also choose the appropriate Mechanical Flow Meters according to the fluid conditions that need to be measured.

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

Below are some of our experience sharing, hoping to help you find the right Mechanical Flow Meters.

Mechanical flow meter for water

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.

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.

Extended reading: 2 inch Water Flow Meter

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3 inch (3″) Water Meter

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2 inch Water Flow Meter

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Digital Water Flow Meters

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Mechanical flow meter for diesel

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.

Read more about: Diesel Fuel Flow Meters

Industrial Fuel Flow Meters

Mechanical flow meter for High viscosity liquid

The oval gear flowmeter is particularly suitable for measuring high viscosity media. And it is not sensitive to changes in the viscosity of the liquid being measured.

Measurable medium:
Fuel, diesel, gasoline, heat transfer oil, hydraulic oil, kerosene, tar, petroleum, crude oil, asphalt, resin and other liquids. Especially suitable for the measurement of high viscosity liquids.

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LCD display Oval Gear High Viscosity Flow Meter

T-series Coriolis Mass Flowmeter for High Viscosity Liquids

Mechanical flow meter for GAS

A mechanical gas flow meter is a precision instrument used to measure the volume of gas flowing through a pipe. It is typically used in industrial and commercial applications where accurate measurement of gas flow is critical.

Mechanical flow meters that can measure gas flow mainly include metal float flow meters and turbine gas flow meters. And orifice plate meter.

A Rotameter flow meter is a variable area flow meter based on float position measurement. It is suitable for liquid and gas volumetric flow measurement and control.

Gas turbine flow meter is a velocity flow meter that measures gas flow. For natural gas, nitrogen, and gas trade measurement.

Relatively speaking, the cost of gas turbine flow meters is higher than that of Rotameter flow meters. But the service life will be longer.

Extended reading: How does a rotameter work

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Mechanical flow meter for Cryogenic liquid

For cryogenic fluids, such as liquid nitrogen, liquid oxygen, etc. It can reach -196 degrees Celsius.

For cryogenic fluids, we provide gear flow meters and low-temperature turbine flow meters.

You can choose the right one according to the flow range.

Read more General-purpose Flow Totalizer for Data collection and calculation

mechanical oil flow meter

Mechanical oil flow meters are devices that measure the rate of oil flow. They are often used in industrial and commercial applications to monitor the rate of oil consumption or production.

There are several different types of mechanical oil flow meters, each designed for a specific application. The most common type of mechanical oil flow meter is the positive displacement (PD) meter. PD meters measure the volume of oil that passes through the meter by displacing a fixed amount of fluid with each revolution of the measuring chamber. This type of meter is very accurate and is often used in applications where precise measurement is critical.

Another type of mechanical oil flow meter is the turbine meter. Turbine meters measure the rate of oil flow by measuring the speed of a rotating turbine blade. Turbine meters are less accurate than PD meters but are more resistant to fouling and clogging.

Read more about: oil flow meter types

No matter which Mechanical Flow Meters you choose. The signal output by Mechanical Flow Meters, such as 4-20mA. The flow signal can be connected to a paperless recorder. Carry out multi-channel flow signal monitoring.

Extended reading: Make Ultrasonic Open Channel Flow Meter Work for You

Frequently
Asked
Questions

Help Center

What are the different types of flow meters?

Flow Metering Principals
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:
Differential Pressure Flow Meters
Orifice Plate
Venturi Tube
Flow Nozzles
The Sonic Nozzle – Critical (Choked) Flow Nozzle
Calorimetric Flowmeter
Ultrasonic Doppler Flowmeter
Positive Displacement Flowmeter
Variable Area Flowmeter or Rotameter
Velocity Flowmeters
Pitot Tubes
Electromagnetic Flowmeter
Turbine Flowmeter
Vortex Flow Meter
Thermal Flowmeter
Coriolis Flowmeter
Mass Flowmeters
Open Channel Flowmeters

Read more about: Flow Meter Selection Guide

What are water meters used for?

Residential water meters can measure the water consumption of a household.
Industrial water meters mainly refer to water flow meters. Can measure the amount of industrial water. For example, the amount of wastewater discharged.
Extended reading: 2 inch Water Flow Meter

What is a digital flow meter?

Digital flow meter is a flow meter with digital display and signal output. Digital flow meter refers to a flow meter with digital display and signal output.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 others output.
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How do you read a mechanical flow meter?

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Which is better mechanical flow meter or digital flow meter?

The choice between a mechanical and a digital flow meter really depends on your specific needs. Mechanical flow meters, such as positive displacement or turbine flow meters, are often more cost-effective and simpler to use. However, digital flow meters, like electromagnetic or ultrasonic ones, offer higher precision, more data output, and need less maintenance. So, if you value accuracy over cost, a digital flow meter might be the better choice.

What is an example of a mechanical flow meter?

An example of a mechanical flow meter is the turbine flow meter. In a turbine flow meter, the fluid moves a turbine in the meter, and the rate of rotation of the turbine is converted into a flow measurement. They are widely used in applications where a high degree of accuracy is not essential, such as water distribution and HVAC.

What are the three 3 types of flow meters?

Flow meters can be broadly categorized into several types, but here are three common ones:

a. Differential Pressure Flow Meters: These measure the flow rate by introducing a constriction in the flow. This creates a pressure drop, which can be correlated with flow rate.

b. Positive Displacement Flow Meters: These measure flow by repeatedly filling and emptying compartments with the fluid to be measured.

c. Velocity Flow Meters: These measure the velocity of the flow and convert it to the flow rate. Examples include turbine, electromagnetic, and ultrasonic flow meters.

What is a mechanical water flow rate meter?

A mechanical water flow rate meter is a device that measures the rate of water flow in a pipeline. It usually employs moving parts, such as a turbine or a set of rotating gears, which move proportional to the flow of water. This movement is then translated into flow rate data.

How does a mechanical water flow meter work?

A mechanical water flow meter works by using the flow of water to move parts of the device. For example, in a turbine flow meter, water flows through the meter, causing a turbine to spin. The rotation speed of the turbine is directly proportional to the water flow rate. In a positive displacement meter, a known volume of water is allowed to fill a chamber, and the number of times this chamber is filled and emptied represents the flow rate.

How accurate is a mechanical water flow meter?

The accuracy of a mechanical water flow meter can vary based on the specific type of meter and the conditions of use. Generally, they offer moderate to high accuracy. For example, turbine flow meters usually have an accuracy within ±1% of the reading, while positive displacement meters can be even more accurate. However, mechanical meters are subject to wear and tear over time, which can impact accuracy, so regular maintenance is recommended.

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Mechanical Flow Meter Selection Guide

How to choose the most suitable mechanical flowmeter for you? It is recommended to refer to the following points:

Remember, there’s no one-size-fits-all solution. Take the time to review these steps and make the right decision for your specific application. Happy flow meter shopping!

Mechanical flow meter price

Sino-Inst offers Mechanical Flow Meters with best price. Please contact our sale engineer for quotation.

Sino-Inst offers over 50 Mechanical Flow Meters for flow measurement. About 50% of these are differential pressure flow meters, 40% is the turbine flow sensor, and 20% are dp flow meters and gear flow meters.

A wide variety of Mechanical 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.

KimGuo11

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.

drurylandetheatre.com