Rotameter flow meter-Variable Area Flow Meters

Rotameter flow meter

What is a rotameter flow 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.

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.

Rotameter Flow meter Features

LZ series metal Rotameter Flowmeter (also known as metal Variable Area Flow Meters) is divided into two series, LZH and LZ. It has the characteristics of simple structure, reliable operation, wide application range, high precision, and convenient installation.

This series of flowmeters is compared with glass rotor flowmeters. It has the characteristics of high-pressure resistance, high temperature, a strong sense of safety, and concise readings.

It can also be used for flow measurement of opaque and corrosive media. The pipe body and flange of the instrument are made of stainless steel (1Cr18Ni9Ti or OCr18Ni12Ho2Ti).

Extended reading: How does a rotameter work

LZH series: Conventional orifice plates and floats are made of stainless steel. Anticorrosive orifice plate floats and tubes inner linings are made of PTFE.

LZ series: The float and tapered tube are made of stainless steel, and this series is non-corrosive.

The LZH series consists of an instrument tube, a standard orifice plate, a cone float, and a magnetic converter;
The LZ series consists of an instrument tube, a standard float, a tapered tube, and a magnetic converter.

The working parameters of this series of meters and their conversion and correction are provided by the meter calculation software to provide standard calculation methods. The meter’s measurement accuracy is guaranteed.

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

Rotameter Flow meter Specifications

Type LZH series LZ series
Flow range Water 2.5~100000L/h;
Air 0.07~3000m3/h
Water 6~100000L/h
Air 0.2~1000m3/h
Turndown ratio DN≤100mm(10:1);
DN>100mm(5:1)
DN<80mm(10:1)
DN≥80mm(5:1)
Precision Standard type 2.5 grade,
special order can reach 1.0 grade
Work pressure DN15, DN25, DN40, DN50: 4.0MPa.
DN80, DN100, DN150: 1.6MPa
DN15,DN25,DN40,DN50:6.4MPa
DN25,DN40,DN50,DN80,DN100:2.5MPa
DN150:1.6MPa
Medium temperature Ordinary type H1:-40℃~100℃
High temperature type H2: -80℃-250℃
Ambient temperature Pointer type: -40℃~65℃
Intelligent type: -25℃~65℃
Connection method Flange connection (flange standard: refer to GB9115-88, JB82-59 (6.4IPa), special specifications are determined according to user requirements)
Explosion-proof grade Intrinsically safe: ExibIICT4 with safety barrier LB987S, explosion-proof certificate number GYB06884
Explosion-proof: ExdIIBT4, explosion-proof certificate number GYB071017
Protection level IP65
Viscosity DN15: ≤5mPa·s, DN25~DN150: ≤250mPa·s
Product performance standards JB/T6844-1993

Rotameter flow meter applications

The metal Rotameter flow meter is suitable for the flow measurement of small-diameter and low-velocity media. It can measure most media such as gas and liquid.

The metal Rotameter flow meter can measure the instantaneous flow and cumulative flow of gases and liquids, including corrosive acid, alkali, and salt solutions. It is especially preferred when the flow is low or when a purely mechanical or inconvenient power supply is required.

Extended reading: Metal Tube Flow Meter Applications

Rotameter flow meters are mostly vertical installation, bottom entry, and top exit type, and can also be installed horizontally. The price is higher. Let me show you a sample.

This is an explosion-proof type for measuring corrosive liquids.

This is a smart type. It can measure gas and liquid. There should be no impurities.

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

Extended reading: Flow Totalizer F3000X for Data collection and calculation

Read More about: Digital Rotameter

Rotameter flow meter structure

A Rotameter flow meter is a variable area flow meter. It consists of measuring tube, float, indicator, process connection, and so on.

Rotameter flow meter working principle

When the measured fluid passes through the annulus formed by the cone and floats from the bottom to top.

The differential pressure produced at the upper and lower ends of the float forms the force for the float to rise.

When the rise of the float is greater than the weight of the float immersed in the fluid. The float rises.

The annulus area increases accordingly. The fluid velocity in the annulus drops immediately.

The differential pressure at the upper and lower ends of the float is reduced. The lifting force acting on the float also decreases.

Until the rising force equals the weight of the float immersed in the fluid, the float will stabilize at a certain height.

The height of the float in the tapered tube and the flow rate through it correspond to each other.

Extended Reading: What is difference between rotameter and flow meter

Advantages:

  • Cheap price.
  • Observe intuitively.
  • easy installation
  • No external power needed
  • Can Measure Liquid or Gas Flows
  • Better rangeability
  • Low cost and low-pressure drop

Disadvantages:

  • Compared with other flow meters, the accuracy is low.
  • The service life is short.
  • Maintenance is required after using for a period of time!

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

  • Installed vertically on a vibration-free pipe. The fluid flows through the meter from bottom to top.
  • When measuring dirty fluids, a filter should be installed upstream of the meter
  • If the fluid itself is pulsating, a buffer tank can be installed. If the instrument itself oscillates, a damping device can be installed.
  • The gas in the instrument must be drained of the liquid.
  • The control valve in the measurement and control system should be installed downstream of the flowmeter. When used for gas measurement, ensure that the working pressure is not less than 5 times the pressure loss of the flowmeter. In order to make the flowmeter work stably.
  • Before installing the metal rotor flowmeter, the welding slag in the pipeline should be purged. Remove the stop element from the flowmeter when installing. When using after installation, open the control valve slowly. Avoid impact damage to the flowmeter.
  • If the measurement requires a wide range of flow, the range exceeds 10 o’clock. Two floats of different shapes and weights can be placed in one instrument. Take the frivolity reading when the flow is small. After the float reaches the top, take the reading of the heavy float. The range can be expanded to 50-100.
  • Liquid meters are usually calibrated with water, and gas meters are calibrated with air. The fixed value is in the engineering standard state. If the fluid density, gas pressure, and temperature of the use conditions are inconsistent with the calibration. Make necessary conversions.

Extended reading: Gas Rotameter Tips

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

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Rotameter flow meter price

Sino-Inst offers over 30 Rotameter flow meter products. About 50% of these are for liquids. 40% are for gas. At best price.

You can refer to the product price of the following Rotameter flow meter price:

Metal rotor flowmeter
Pipe size 1/2 inch
Medium: oxygen
FOB Price: USD 281.50/pc

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

Extended Reading: Collection of Industrial Insertion Flowmeter Type

Sino-Inst is a globally recognized supplier and manufacturer of Rotameter flow meters, located in China.

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

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

Emerson-Rosemount Hart 475 Field Communicator

475 Field Communicator, Emerson-Rosemount Hart. A small amount of stock. Original Product.

Rosemount handheld 475 Field Communicator is for debugging any product under the global HART protocol. Such as pressure transmitter. Electromagnetic Flowmeter. Vortex flowmeter. Mass flowmeter. valve. Temperature Transmitter. Regulating valve, positioner.

The 475 Field Communicator supports HART and FOUNDATION Fieldbus devices. Allows you to configure, maintain or troubleshoot the device.

Emerson Rosemount (Rosemount, USA) Hart475 handheld communicator is a new type of 475 field communicator developed by Emerson Process Management. It is also an improved and upgraded model of the Rosemount Hart375 handheld communicator. It supports both the HART communication protocol and the foundation site Bus communication protocol. And has the characteristics of universal, reliable, portable, intrinsically safe, easy to upgrade, and so on. These features will quickly make the Rosemount 475 handheld communicator the new standard.

The HART communication handheld communicator is used to directly communicate with all popular HART smart transmitters. It is used as a multifunctional handheld communicator for the maintenance and diagnosis of HART instruments.

The use of HART communication handheld programmer can be used to complete almost all on-site instrument maintenance and debugging work. Including fault diagnosis, daily maintenance, start-up debugging, calibration, etc.

The HART communication handheld terminal is a portable terminal (universal USB interface can be connected to the PC for operation). It is used with the instrument that adopts the HART communication protocol. It can be set, changed, and displayed, and it can monitor the input/output Value and self-diagnostic result. Set constant current output and zero adjustments. And it has a HART Moden function.

It can be used in conjunction with the host computer software of various manufacturers to adjust and maintain the instrument more comprehensively. It is compatible with HART275, HART375, HART475. It can communicate with all imported and domestic instruments with 1151, 3051, EJA, ABB, and other HART protocols.

When the system starts or maintains operation, it can be used as long as the HART communicator is connected to the 4-20mA communication signal line.

Extended reading: How to calibrate HART pressure transmitters

① Rosemount 475 field communicator is the new standard of a handheld communicator. It is a new generation of communicators developed based on Rosemount 275Hart and 375Hart’s more than 20 years of application experience and the further needs of users.

② Following the successful application of the Rosemount 375HART communicator. Emerson Process Management has introduced a new type of Rosemount 475 field communicator. It supports the HART communication protocol. It also supports the Foundation Fieldbus communication protocol. It is versatile, reliable, portable, Intrinsically safe, easy to upgrade, and other features. These features will quickly make the Rosemount 475 handheld communicator the new standard.

③ At present, more than 300 equipment suppliers provide more than 1,000 HART and FF Fieldbus equipment protocols. Rosemount 475 handheld communicator supports Emerson’s PlantWeb factory management and control network technology. And it combines 20 years of providing HART users with its instruments and valves. Field experience is required for configuration and maintenance. The powerful Fieldbus branch diagnosis function of Rosemount 475 Handheld Communicator is based on Emerson’s extensive experience of thousands of Fieldbus devices worldwide.

Versatility: Rosemount 475 handheld communicator supports all HART® and FOUNDATION Fieldbus devices. In addition, there is plenty of room for your future development;

Users can upgrade on-site: Users can download the latest version of HART and FOUNDATION Fieldbus-related content from the Internet to upgrade the Rosemount 475 handheld communicator on-site.

Safety: Rosemount 475 handheld communicator is the only field operator that meets all intrinsic safety requirements. Including ATEX-compliant, CENELEC, FM, CSA, and FISCO.

Robust and reliability: This is one of the reasons why he is called a “Handheld Communicator”. Some work must also be performed on the device. The Rosemount 475 Communicator is specially designed for the harsh working conditions of the factory.

Connect with AMS interface: Rosemount 475 handheld communicator can connect with AMS device management software interface. The configuration data transmission of HART instruments and valves is carried out between the equipment management software and the handheld communicator.

  • Microprocessor: 80MHZ Hitachi Hitachi SH3
  • Interface: 3 4mm banana holes
  • Built-in memory: 32M
  • Infrared data port: maximum rate 115kbs/s, distance maximum 30cm
  • System card: 1GB or higher
  • Working environment: -10~50 degrees Celsius
  • RAM: 32M
  • Protection: IP51 (front)
  • Expansion module: 32M
  • Earthquake resistance: 1m to the concrete floor without any problem
  • Weight: about 0.9KG, including battery
  • Humidity: 0-95% (no condensation)
  • Display: 1/4VGA (240*320 pixels); color 8.9cm touch screen, automatic dimming display
  • Storage: -20~55 degrees Celsius (with battery); -20~60 degrees Celsius (without battery)
  • Keyboard: 25 keys, 4 operation keys, 12 letter keys, 4 shoulders, 4 function keys and switch keys
  • Battery: Rechargeable lithium ion battery, can be used for 20 hours, 100~240VAC charging
  • Charger: Mini DIN 6-pin socket
  • Upgrade requirements: winxp operating system CD-ROM can be connected to the internet

The most commonly used models of Rosemount HART475 Communicator are:

  • Rosemount Communicator 475HP1ENA9GM9 (basic type)
  • Rosemount Handheld Communicator 475HP1ENAUGM9 (three-year upgrade)
  • Rosemount Communicator 475HP1EKL9GM9 (explosion-proof)
  • Rosemount Communicator 475HP1EKLUGM9 (explosion-proof, three-year upgrade)
  • Rosemount Handheld Communicator 475FP1EKLUGM9 (HART+FF protocol)
ModelProduct description
475Field communicator (1)
Numbering  Protocol
HHART
FFOUNDATION fieldbus
Numbering  battery model
PRechargeable lithium battery pack
NumberingPower supply/charger
1Power supply/charger (0~24VAC, 50/60HZ, American and British European plugs)
9Excluding (2)
NumberingLanguage
EEnglish (standard)
DGerman
JJapanese
RRussian
 Numbering certified product
KLFM, CENELEC/ATEX.CSA intrinsically safe (including FISCO)
NANo certification
NumberingFacilitate upgrade (3)
UConvenient upgrade options (including unlimited system card upgrades with a 3-year period)
9Excluding
 NumberingStandard mode
GMGraphic enhancement
Configuration management
 Numbering Bluetooth
TBluetooth function
9No Bluetooth function
Numbering
ASpare rechargeable lithium ion (4)
SStandard rubber protective box

You may like: 475 field communicator manual

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Sino-Inst offers over Emerson Hart 475 Field Communicator. Currently in stock. Please contact our sales engineer to confirm the price and delivery time.

Industrial Oil Flow Meters

The oil Flow Meter is very important for industrial production and trade settlement. This article mainly wants to help users find the suitable industrial Oil Flow Meter effectively.

LEARN MORE

Industrial oil flow meters measure the volume or mass of 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.

Then, we need to choose a suitable flow meter that meets the measurement and budget according to different working conditions.

Oil flow meter digital refers to an oil flow meter with a local digital display function. The flowmeter can be configured with local digital display, pointer display, and without local digital display. Therefore, it is determined whether the digital display function is needed according to the needs of users.

Explore Oil and Gas Flow Meters

The signal output by the flowmeter is generally a pulse signal or a 4-20mA current signal, both of which output instantaneous flow.

The flowmeter voltage signal is unstable. It is simply disturbed during long-distance transmission. The current signal is relatively stable.

The current signal is used in the transmission process, and the voltage signal (the range of voltage value) is used for detailed control in the control instrument (integrator) and DCS system.

Extended reading: Crude Oil Measurement – Radar Level Meter Measuring Vaulted Buffer Tank

The mechanical oil flow meter is a type of flow meter. The mechanical flowmeter is a purely mechanical measuring component. Such as turbine flowmeter, rotameter, etc. Relatively speaking, for example, ultrasonic flowmeters use ultrasonic principles instead of mechanical principles. So the ultrasonic flowmeter is not a mechanical flowmeter.

Oil is generally transported through pipelines. There are many ways to measure oil flow. For example, use the oil tank level difference to calculate the oil flow. Of course, the simplest and most effective way is to use a flow meter.

Although the types of oil flow meters are different, their working principles are different. However, they can all help us achieve a goal. That is to measure and monitor the flow of oil. Instantaneous flow, cumulative flow, etc.

So that we can better control production and trade.

Extended reading: What Is Hydraulic Flow Meter?

Oil flow meter types

At present, the following types of flow meters can be used to measure oil: Turbine flow meters. Gear flow meter. Vortex flowmeter. Ultrasonic flow meter. Mass flowmeter. Differential pressure flow meters.

Turbine Flow Meters

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

Vortex Flow Meters

Vortex flow meter, also called Vortex shedding flow meter. Vortex Flow Meter is suitable for flow measurement of steam and various liquids and gases.

Ultrasonic Flow Meters

The ultrasonic flow meter measures the liquid flow rate quickly and effectively. There are two types of ultrasonic flowmeter technology: Doppler frequency shift and transit time.

Differential Pressure Flow Meters

Differential Pressure Flow Meter is also called DP flow meter. Differential pressure flow meters use the principle of differential pressure to measure the flow of liquid, gas and steam.

Volumetric Flow Meters

Volumetric Flow Meter, as a mechanical flow meter, is also called Positive displacement flowmeter. It can measure the volume flow of high viscosity and corrosive fluids.

Mass Flow Meters

Mass flow meter directly measures the mass flow of the medium passing through the flow meter. It can also measure the density, temperature and viscosity of the medium

You can find a suitable flow meter in the appropriate type of oil flow meter according to your needs. Of course, maybe, you don’t know what type of flowmeter you should use.

Extended Reading: Fuel Flow Meters for Diesel-Marine fuel-Industrial oil

Next, we recommend suitable flow meters for some commonly used oils.

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.

Industrial Fuel is an important energy source for production and manufacturing. For example, diesel, marine fuel, gasoline, etc. It is very necessary to accurately measure industrial fuel. Commonly used industrial fuel flow meters, such as turbine flow meters, gear flow meters, mass flow meters, ultrasonic flow meters, etc.

If your fuel has low viscosity and good flow rate. You can first refer to the turbine flowmeter. As long as the pressure and flow range are satisfied, you can find a suitable flow meter and use the best price.

Extended reading: Flow Totalizer F3000X for Data collection and calculation

If you need to measure the flow of cooking oil. Such as sunflower oil. Then, the sanitary flowmeter is the first choice.

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

Read more about: Sanitary Flow Meters-316SS,Tri clamp-Pulse- for Brewery

Vortex Shedding Flow Meter

The heat transfer oil uses a high-temperature vortex flowmeter to measure the flow rate. Can meet the measurement of high temperature. the best price.

Extended Reading: Summary Of Crude Oil Flow Measurement Options

For measuring lubricating oil, the mechanical oval gear flowmeter is the first choice. Because of measuring temperature, high viscosity measurement can be met. Oil with low viscosity can be measured with a turbine flowmeter.

To measure crude oil, you can also consider the oval gear flowmeter first. If the precision is extremely high. Then you can use a mass flow meter.

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

There is no hydraulic oil flow meter in the strict sense. It is not accurate to say which flowmeter is a hydraulic flow meter. Which one to use depends on the specific flow measurement conditions.

For example, the hydraulic oil is also labeled, 40 #, 46 #, or other viscosity properties. Then choose a suitable flow meter according to the relevant information such as flow, pressure, viscosity, and so on.

Read more: How to Select Hydraulic flow meter for Hydraulic oil flow? 

Of course, turbine flowmeters can be considered first.

Extended Reading: Guide and Selection for Diesel Fuel Flow Meters

The heating oil flow meter is also called a heating oil flow gauge. It is a high-temperature mechanical fuel meter. A high-temperature type oval gear flow meter can be used as a heating oil flow meter. Can reach 60℃~200℃.

Read more.

If you need to measure high temperature and high pressure (-0.1MPa-32MPa) oil storage tanks, then learn about New Choice for Heating Oil Tank Level Sensor.

Extended Reading: Petroleum Flow Meter

Of course, the above are just our suggestions. If you need to choose the right flow meter. You can contact Sino-Inst sales engineers. We will provide you with the most suitable measurement solution.

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Sino-Inst offers over 30 Industrial Oil Flow Meters for flow measurement. About 50% of these are Turbine flow meters, 40% is the mass flow sensor, and 20% are DP flow meter.

A wide variety of Industrial Oil 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.

Fluid Flow Meters

Fluid Flow Measurement Devices

Fluid Flow Meters measure the amount of liquid, gas, or steam passing through the piping system. Most Fluid Flow Meters are designed to measure the speed of fluid flowing through pipes. They use this information and the internal cross-sectional area of the pipe to calculate the volume. Or the amount of mass of fluid passing through the system in a given period of time (that is, 50 gallons per minute).

Fluid flow meter principle

Principles of mechanics:

  • Instruments that belong to this type of principle include differential pressure type and rotor type using Bernoulli’s theorem.
  • Impulse type and movable tube type using the momentum theorem.
  • Use the direct mass formula of Newton’s second law.
  • Target type using the principle of fluid momentum.
  • Turbine type using the angular momentum theorem.
  • Vortex type and vortex street type using the principle of fluid oscillation.
  • Pitot tube type and volume type, weir, trough type, and so on using total static pressure difference.

Principles of Electricity:

Instruments used in this type of principle include electromagnetic, differential capacitive, inductive, strain resistance, etc.

Acoustic principle:

Ultrasonic type is used for flow measurement using acoustic principles. Acoustic type (shock wave type) and so on.

Thermal principle:

There are calorimetric, direct calorimetry, indirect calorimetry, etc., which use thermal principles to measure flow.

Optical principle:

Laser type, photoelectric type, etc. are instruments that belong to this type of principle.

Based on physical principles:

Nuclear magnetic resonance, nuclear radiation, etc. are instruments that belong to this type of principle.

Other principles: There are marking principles (tracing principles, nuclear magnetic resonance principles), related principles, etc.

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

Fluid flow meter types

  1. According to the measurement objects, there are two categories: closed pipes and open channels.
  2. According to the principle of measurement, there are mechanical principles, thermal principles, acoustic principles, electrical principles, optical principles, atomic physics principles, etc.
  3. According to the purpose of measurement, it can be divided into total measurement and flow measurement. The meters are called total meter and flow meter respectively.

Liquid flow meters can be divided into: anti-corrosion flow meters. Liquid flow meters.. Differential pressure flow meters. Ammonia flow meters. Turbine flow meters. Electromagnetic flow meters. Vortex flow meters in fluid oscillating flow meters. Mass flow meters.

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

The differential pressure flowmeter is composed of a primary device (detection part) and a secondary device (differential pressure conversion and flow display instrument).

Differential pressure flowmeters are usually classified in the form of detection parts, such as orifice flowmeters, venturi flowmeters, and averaging velocity tube flowmeters.

The secondary devices are various mechanical, electronic and electromechanical integrated differential pressure gauges, differential pressure transmitters and flow display instruments.

It has been developed into a large class of instruments with a high degree of three-dimensionalization (serialization, generalization, and standardization) and a large variety of specifications. It can measure flow parameters as well as other parameters (such as pressure, level, density, etc.)

Extended Reading: Advantages and disadvantages of differential pressure flow meter

The detection parts of the differential pressure flowmeter can be divided into several categories according to its principle of action: throttling device, hydraulic resistance type, centrifugal type, dynamic head type, dynamic head gain type and jet flow type.

Differential pressure flow meters are one of the most widely used flow meters. Among all kinds of flow meters, their usage ranks first.

In recent years, due to the advent of various new flowmeters, its usage percentage has gradually decreased, but it is still the most important type of flowmeter.

Extended reading: V-Cone Flow Meter Working Principle

Target flow meters began to be used in industrial flow measurement in the 1960s. It is mainly used to solve the flow measurement of high-viscosity and low-Reynolds number fluids. It has experienced two major development stages of pneumatic meters and electric meters.

SBL series intelligent target flowmeter is based on the measurement principle of the original strain gauge (capacitive) target flowmeter. The latest force sensor is used as the measurement and sensitive transmission element. At the same time, modern digital intelligent processing technology is used. And developed a new type of flow meter.

Positive displacement flow meters, also known as fixed displacement flow meters, or PD flow meters for short. It is 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 volume of the fluid is measured according to the number of times that the measuring chamber is filled with and discharged the volume part of the fluid successively.

Extended reading: Positive Displacement Flow meter Technology

Positive displacement flow meters are classified according to their measuring components and can be divided into oval gear flow meters, scraper flow meters, dual rotor flow meters, rotary piston flow meters, reciprocating piston flow meters, disc flow meters, and liquid-sealed tumbler flow meters. , Wet gas meter and membrane gas meter, etc.

Extended reading: Flow Totalizer F3000X for Data collection and calculation

The turbine flowmeter is the main type of velocity flowmeter. It uses a multi-blade rotor (turbine) to sense the average flow rate of the fluid. It is a meter that derives the flow or total amount from it. Generally, it is composed of two parts, a sensor and a display, and it can also be made into an integral type.

Turbine flowmeters, positive displacement flowmeters, and mass flowmeters are referred to as the three types of flowmeters with high repeatability and high precision, and are one of the top ten types of flowmeters.

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

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

The vortex flowmeter is a meter in which a non-streamlined vortex generator is placed in the fluid. The fluid is alternately separated on both sides of the generator to release two series of regularly staggered vortices.

Vortex flowmeters can be classified into stress type, strain type, a capacitive type, thermal type, vibrating type, photoelectric type, an ultrasonic type according to the frequency detection method.

An ultrasonic flowmeter is a meter that measures the flow rate by detecting the effect of fluid flow on the ultrasonic beam (or ultrasonic pulse).

According to the principle of signal detection, ultrasonic flowmeters can be divided into propagation velocity difference method (direct time difference method, time difference method, phase difference method, and frequency difference method), beam shift method, Doppler method, cross-correlation method, and spatial filtering method And noise law, etc.

Ultrasonic flowmeters are the same as electromagnetic flowmeters. Because there are no obstructions in the flow channel of the instrument, they are non-obstructive flowmeters. They are a type of flowmeter suitable for solving difficult problems in flow measurement. Especially in large-diameter flow measurement.

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

Coriolis Mass Flowmeter is a novel instrument that directly and accurately measures the mass flow of fluids. The main structure adopts two U-shaped tubes arranged side by side. The curved parts of the two tubes vibrate slightly towards each other. Then the straight pipes on both sides will follow the vibration. That is, they will move closer or open at the same time. That is, the vibration of the two pipes is synchronized and symmetrical.

If the fluid is introduced into the pipe while the pipe is vibrating synchronously, so that it flows forward along the inside of the pipe, the pipe will force the fluid to vibrate up and down together with it.

The thermal flow meter sensor contains two sensing elements. A speed sensor and a temperature sensor. They automatically compensate and correct for gas temperature changes.

The electric heating part of the instrument heats the speed sensor to a certain value higher than the temperature of the working condition. A constant temperature difference is formed between the speed sensor and the sensor that measures the temperature of the working condition.

When the temperature difference is kept constant, the energy consumed by electric heating, which can be said to be the heat dissipation value, is proportional to the mass flow rate of the gas flowing through.

The rotameter consists of two parts.

One piece of rotameter is a tapered tube that gradually expands from bottom to top.

The other part of the rotameter is a rotor that is placed in a tapered tube and can move freely up and down along the centerline of the tube.

When measuring the flow of fluid, the measured fluid flows in from the lower end of the tapered tube. The flow of the fluid impacts the rotor and generates a force on it (the magnitude of this force varies with the magnitude of the flow).
When the flow is large enough, the generated force will lift the rotor and raise it.

At the same time, the measured fluid flows through the annular section between the rotor and the tapered tube wall.

There are three forces acting on the rotor at this time: the dynamic pressure of the fluid on the rotor, the buoyancy of the rotor in the fluid, and the gravity of the rotor itself.

When the flowmeter is installed vertically, the center of gravity of the rotor coincides with the tube axis of the tapered tube, and the three forces acting on the rotor are all along the direction parallel to the tube axis.

When these three forces reach a balance, the rotor floats smoothly on a certain position in the cone.

For a given rotameter, the size and shape of the rotor have been determined. Therefore, its buoyancy in the fluid and its own gravity are known to be constant. Only the dynamic pressure of the fluid on the float changes with the flow rate of the incoming flow. of.

Therefore, when the flow rate of the incoming flow becomes larger or smaller, the rotor will move up or down. The flow cross-sectional area of the corresponding position also changes. Until the flow rate becomes the corresponding speed when the flow rate becomes balanced, the rotor will be stable in the new position.

For a given rotameter, the position of the rotor in the cone tube is in a one-to-one correspondence with the flow rate of the fluid flowing through the cone tube.

The fluid-filled with the pipe flows through the throttling device in the pipe. It causes local contraction near the throttling piece, and the flow velocity increases. There is a static pressure difference between the upstream and downstream sides.

Under the condition of known relevant parameters, according to the principle of flow continuity and Bernoulli equation, the relationship between differential pressure and flow can be deduced to obtain the flow.

Read more about: Orifice Flow Meter

Different from the previous ones, the open channel flow meter is a flow meter that measures the natural flow of the free surface in a non-full tubular open channel.

The working principle of the open channel flowmeter is to use the open channel technology. By measuring the fluid level height, the flow rate is obtained through the calculation of the internal microprocessor of the instrument.

Because it is a non-contact measurement, the open channel flowmeter can be used in harsher environments.

The open channel flowmeter launches and receives the open channel under the control of the computer.

Calculate the distance between the open channel flowmeter and the measured liquid level according to the transmission time. Thus the liquid level height is obtained. Because there is a certain proportional relationship between the liquid level and the flow rate.

Therefore, the liquid flow rate Q can be finally obtained according to the calculation formula.

Hydraulic fluid flow meter

Industrial Hydraulic oil flow meter, also called hydraulic flow meter gauge. Hydraulic oil flow meters are inline flow meters for hydraulic oil flow measurement.

Sino-Inst offers Turbine, Mass flow, Oval gear, V-cone, Target, and Orifice flow meters for inline hydraulic oil flow. Features like: bidirectional, high pressure, analog, can be customized as customer need.

Extended reading: What Is Hydraulic Flow Meter?

Ultrasonic fluid flow meter

The ultrasonic flow meter measures the liquid flow rate quickly and effectively. There are two types of ultrasonic flowmeter technology: Doppler frequency shift and transit time.

Transit time ultrasonic flow meter is most suitable for measuring the flow of cleaning liquid. Therefore, it is the most popular type of ultrasonic meter.

Doppler ultrasonic flow meter can measure the frequency difference of sound waves reflected from bubbles or particles in the airflow. It is suitable for aerated or dirty liquids.

Fluid mass flow meter

Fluid mass flow meter directly measures the mass flow of the medium passing through the flow meter. It can also measure the density of the medium and indirectly measure the temperature of the medium.

A flow measuring instrument that measures the mass flow in the pipeline. The measured fluid is under the condition that the pressure, temperature and other parameters change greatly. If only the volume flow is measured, the change in fluid density will bring about a large measurement error.

In positive displacement and differential pressure flowmeters, the density of the fluid to be measured may vary by 30%, which will cause an error of 30 to 40% in the flow rate.

With the improvement of automation level, many production processes have put forward new requirements for flow measurement. The chemical reaction process is controlled by the quality (not the volume) of the raw materials.

The heating and cooling effects of steam and air flow are also proportional to the mass flow.

The strict control of product quality, accurate cost accounting, and fuel control of airplanes and missiles all require precision. Therefore, the mass flow meter is an important flow measuring instrument.

You may like: High-Temperature Oval Gear Heating oil Flow Meter

Fluid Flow Meters Selection Guide

How to select the flowmeter?

It can be considered from five aspects. These five aspects are flow meter performance, fluid characteristics, installation conditions, environmental conditions and economic factors. The detailed factors in the five areas are as follows:

  1. Instrument performance: accuracy, repeatability, linearity, range, flow range, signal output characteristics, response time, pressure loss, etc.;
  2. Fluid characteristics: temperature, pressure, density, viscosity, chemical corrosion, abrasiveness, fouling, miscibility, phase change, electrical conductivity, speed of sound, thermal conductivity, specific heat capacity, isentropic index;
  3. Installation conditions: pipeline layout direction, flow direction, length of the upstream and downstream side of the test piece, pipe diameter, maintenance space, power supply, grounding, auxiliary equipment (filter, getter), installation, etc.;
  4. Environmental conditions: ambient temperature, humidity, electromagnetic interference, safety, explosion-proof, pipeline vibration, etc.;
  5. Economic factors: instrument purchase, installation, operation, calibration, maintenance, instrument service life, spare parts, etc.

The flowmeter selection steps are as follows:

  1. According to the fluid type and five consideration factors, the available instrument types are initially selected (there are several types for selection);
  2. Collect data and price information for the primary selection type. Prepare conditions for in-depth analysis and comparison;
  3. Use the elimination method to gradually concentrate on 1 or 2 types. It is necessary to repeatedly compare and analyze the five factors to finally determine the pre-selection target.

Frequently asked questions

The easiest way to measure fluid flow is to install the instrument. Such as flow meters, flow meters. Can monitor the flow of gas, liquid and other fluids.

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

Read more about: Liquid Flow Meters Selection Guide

  • Differential Pressure type. Orifice plates. Venturi meters. Annubar.
  • Differential Area type (Rotameters)
  • Electromagnetic flowmeters.
  • Ultrasonic flowmeters.
  • Turbine flowmeters.
  • Vortex flowmeters.
  • Positive Displacement Meters.

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

If you insist on dividing flow meters into three categories. I think it can be divided into velocity flow meters, volumetric flow meters, and mass flow meters.

Related fluid flow measurement devices

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Inline water flow meters

Featured inline water flow meters Strap on flow meter X3  External clamp-on flow sensor. Easy to…

Sino-Inst offers over 50 flow meter for flow measurement. About 50% of these are differential pressure flow meters, 40% is the liquid flow sensor, and 20% are Ultrasonic Level Transmitter 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.


Air mass flow meter VS Controller

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.

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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.

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What is a mass flow controller?

The mass flow controller (abbreviated as MFC) not only has the function of the mass flow meter. More importantly, it can automatically control the gas flow. That is, users can set the flow according to their needs. MFC automatically keeps the flow constant at the set value. Even if the system pressure fluctuates or the ambient temperature changes. It will not deviate from the set value.

Simply put, the mass flow controller is a steady flow device. It is a gas steady flow device that can be set manually or connected to a computer for automatic control.

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

What does a mass air flow meter do?

Industrial Air mass flow meter is a meter used to measure the flow of industrial gas pipelines. The mass flow meter directly measures the mass flow of the medium passing through the flow meter. It can also measure the density of the medium and indirectly measure the temperature of the medium.

Since the transmitter is an intelligent instrument with a single-chip microcomputer as the core, more than a dozen parameters can be derived for users to use based on the three basic quantities mentioned above.

The mass flow meter has flexible configuration, powerful functions and high performance-price ratio. It is a new generation flow meter.

Extended Reading: Digital air flow meters

What is the principle of a mass flow controller?

The mass flow controller is composed of a flow sensor, a diverter channel, a flow regulating valve and an amplifying controller.

The flow sensor uses the principle of capillary heat transfer thermometry to measure the mass flow of gas (without temperature and pressure compensation).

The flow signal measured by the sensor heating bridge is sent to the amplifier for amplification. The amplified flow detection voltage is compared with the set voltage, and then the difference signal is amplified to control the regulating valve. The closed loop controls the flow through the channel to make it equal to the set flow.

The flow divider determines the flow of the main channel.

A regulated power supply and a digital voltmeter are provided on the flow display instrument matched with the mass flow controller. Set potentiometer, peripherals, built-in conversion and three-position valve control switch, etc.

Extended reading: How To Reduce The Effect Of Pressure On The Mass Flow Meter?

How to understand the flow unit of a mass flow meter/mass flow controller?

Gas mass flow units are generally expressed in sccm (Standard Cubic Centimeter per Minute, standard milliliters per minute) and slm (Standard Liter per Minute, standard liters per minute).

This means that under different conditions of use, the indicated flow rate is the flow rate in the standard state.

The standard state requirements are: air pressure—101325Pa (760mm Hg); temperature—0℃ (273.15K). This is an important difference between this meter and other flow meters, and it is also the difference between sccm and slm from mL/min and L/min.

For most users, the expression method of volume flow is very habitual. Easy to use. But there are also users who need to know the mass of the medium flowing in a unit of time (such as g/min). This requirement is very easy to achieve. Because the gas density in the standard state is a constant. , Can be easily found, so it can be realized by simply doing a multiplication (multiplying the density by several slm). Therefore, the volume flow rate in the standard state is equivalent to the mass flow rate.

When to use a mass flow meter and when to use a mass flow controller?

Generally speaking, when only measuring or monitoring the flow, use a mass flow meter.

When you need to control the flow, use a mass flow controller.

For some measurement occasions, both can be used. For example, when measuring the flow capacity of capillary tubes, use a mass flow meter when measuring flow at a constant pressure.

When measuring pressure with constant flow, a mass flow controller is required.

Note that when the mass flow controller is in the cleaning state. It can also be used as a mass flow meter. It’s just that the pressure drop is larger than that of ordinary mass flow meters.

Extended reading: What is an air pressure transducer?

What are the main advantages of mass flow meters/mass flow controllers?

(1) Flow measurement and control are not inaccurate due to temperature or pressure fluctuations.

For most flow measurement and control systems, it is difficult to avoid system pressure fluctuations and environmental and medium temperature changes. For ordinary flow meters, fluctuations in pressure and temperature will cause larger errors. For mass flow meters/mass flow controllers, it can generally be ignored.

(2) Automation of measurement control

The mass flow meter/mass flow controller can output the flow measurement value as a standard electrical signal output.

In this way, it is easy to realize digital display of flow, automatic measurement of accumulated flow, automatic data recording, computer management, etc.

For mass flow controllers, automatic flow control can also be realized.

Generally, the analog MFC/MFM input and output signals are 0~+5V or 4~20mA, and the digital MFC/MFM is also equipped with RS232 or RS485 digital serial communication ports. It can be easily connected to a computer for automatic control.

(3) Accurately control flow

The mass flow controller can accurately control the given amount of gas. This is particularly useful for flow control in many processes, and for proportional control of different gases.

(4) Wide scope of application

  • With a wide working pressure range, our products can range from vacuum to 10MPa.
  • Can be applied to a variety of gas media (including some corrosive gases, such as HCL).
  • There is a wide flow range. The minimum flow range of our products can reach 0~5 sccm, and the maximum flow range can reach 0~200 slm.
  • The resolution of the flow display can reach 0.1% of the full scale.
  • The flow control range is 2~100% of full scale (range ratio is –50:1). Therefore, it is widely used in many fields.

Read more about:

What are the disadvantages of mass flow meters? What are the fears of using mass flow controllers?

Relative to cheap rotameters, the main disadvantage of mass flow meters is that they are relatively expensive.

There are four fears when using a mass flow controller:

First fear of dust. If dust enters the flowmeter, it will block the sensor and the diverter, causing measurement errors. It is required to install a filter before the air inlet;

The second fear is that liquid and oil will enter the MFC. It will cause loss of control. If the outlet of the MFC is connected to a liquid tank, a check valve must be added to the outlet of the MFC to prevent the liquid from returning;

The third fear of using moist corrosive gas. Moist and corrosive gases will rust the stainless steel and cause damage to the MFC channel. Therefore, it is required to dry the gas and the MFC piping system before using the corrosive gas;

Fourth, fear not operating in accordance with safety rules when using highly corrosive, flammable, explosive, toxic, and other hazardous gases. It may cause product damage and other more serious losses. Correct use and safe operation are important to every user.

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

Can mass flow controllers be used to control corrosive and special gases? How to choose sealing materials?

Mass flow controllers can be used to control various gases, including corrosive gases and special gases.

But it should be noted that for the use of corrosive gas and special gas, it is necessary to select the model and sealing material appropriately.

When ordering, the user needs to make a special statement to the supplier that the gas is used. In order to avoid serious losses due to wrong selection or selection of sealing materials.

Generally, the wet materials of the gas mass flow controller that contact the working gas are 316L stainless steel, polytetrafluoroethylene, and sealing materials. Sealing materials are divided into two categories: metal seals and rubber seals.

The material of the metal seal is generally corrosion-resistant materials such as stainless steel, gold or nickel.

In principle, MFC with metal seal can be used for any gas. Including various corrosive gases and special gases.

For strong corrosive gases such as boron tribromide, boron trichloride, hydrogen fluoride, and metal oxide gases used in MOCVD, it is recommended to use metal-sealed MFC.

Due to the high price of metal-sealed MFCs, rubber-sealed MFCs are usually used where the requirements are not high.

If there is no special statement, all MFCs are sealed with fluorine rubber. It can be used for most acidic and alkaline corrosive gases. For example, it can be used for halogenated dry gases such as hydrogen chloride.

Some other special corrosive gases require special rubber.

Ammonia-Ammonia resistant rubber, such as ethylene-propylene rubber, neoprene rubber or nitrile rubber is required. Organic solvent vapor (acetone, toluene, etc.)-silicone rubber is required. Boron tribromide, boron trichloride, hydrogen fluoride, etc.-need to use perfluoro rubber.

Sino-Inst offer over 5 Air mass flow meters and controller with Best Price.

A wide variety of Air mass flow meters and controller options are available to you, such as free samples, paid samples. More about Types Of Air Flow Measurement Instruments.

Sino-Inst is Air mass flow meters and controllers suppliers, located in China. Mass Flow Meters products are most popular in North America, Mid East, and Eastern Europe.

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Liquid mass flow controller

Liquid mass flow controller can quickly and accurately measure the volume flow/mass flow of the process liquid quickly and accurately.

The liquid quality controller/flow meter is specifically designed for the measurement and control of small flow liquids. It is mainly used for low-viscosity, non-corrosive 304 materials. The internal PID closed-loop system is set to realize automatic flow adjustment.

Liquid mass flow controller Features

  • It can quickly and accurately measure the volume flow/mass flow of the process liquid;
  • Use a customized high-speed proportional control valve to accurately control the liquid volume flow/mass flow;
  • With a unique vent hole can easily exhaust air;
  • There are no movable components and thermal components inside. Passed anti-vibration test. Insensitive to installation direction;
  • Using patented internal compensation laminar flow pressure difference technology, the fluid still maintains laminar motion under a large flow range;
  • Integrated multi-function digital display. Allows users to control the set value and PID valve adjustment only through the operation of the screen buttons. Simultaneously open analog input and output and RS-485 digital communication;
  • Digital liquid flow meters/flow controllers are widely used in various industries, such as process manufacturing, food analysis, analytical testing and measurement, etc.

Liquid mass flow controller specifications

Operating temperature+10~+50℃
Working pressure3 MPa/10MPa
Requirements for installation method/direction>1L/min range, the valve must be installed vertically
Valve gradeValve closed
Protection levelIP40
Materialstainless steel
Monochrome LCD displaySimultaneous display of flow and settings
Digital output signalRS-485/PROFIBUS
Analog input signal0-5Vdc/4-20mA
Analog output signal0-5Vdc/4-20mA
Electrical signal interfaceDB15
Supply voltage24-30 Vdc
Supply current0.750Amp
Measuring rangeLow range: 10SCCM~30SLM
Medium range: 30SLM~300SLM
Large range: 500SLM~3000SLM
Accuracy (under standard conditions after zero adjustment)±1%F.S
Repeatability±1%F.S
Zero drift & full scale drift0.02%F.S/C/Atm
Working range/range adjustable ratio2%~100%F.S/50:1
Maximum measurable flow100%F.S (controllable)
Typical response time200 milliseconds (adjustable)
Start-up warm-up time<5 seconds

Liquid mass flow controller applications

Liquid mass flow meters/controllers are widely used in various industries. Such as process manufacturing, food analysis, analytical testing, and measurement, etc.

Multi-variable measurement and 50:1 range adjustable ratio. So that only one liquid flow meter & controller can replace the effect of multiple devices.

The accuracy of 1%, repeatability of 1%, and control response time of fewer than 200 milliseconds ensure the normal operation of the process gas.

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

Liquid mass flow controller Dimensions

What Is Liquid Mass Flow Controller?

Liquid flow controllers can be used to measure and control the flow rate of various types of liquids.

Liquid flow controllers are typically used in applications that require a constant flow rate and can compensate for changing pressure changes. Because of this feature, liquid flow controllers cost more than liquid flow meters that typically only measure flow. Read more about: The Pros and Cons of Micro Motion Flow Transmitters

Gas mass flow controller for micro gas flow measure &control

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.

  • Product SKU: Gas mass flow controller
  • Product Brand: Sino-Inst
  • Product Currency: USD
  • Product Price: 900
  • Price Valid Until 2099-09-09
  • Product In-Stock: PreOrder

Extended reading: Liquid Mass Flow Meter

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FAQ

Generally speaking, when only measuring or monitoring the flow, use a mass flow meter. When you need to control the flow, use a mass flow controller.

In some measurement occasions, both can be used. For example, when measuring the flow capacity of the capillary tube, when measuring the flow at constant pressure, use a mass flowmeter.
When measuring pressure with constant flow, a mass flow controller is required.

Note that when the mass flow controller is in the cleaning state, it can also be used as a mass flow meter, but the pressure drop is larger than that of an ordinary mass flow meter.

Extended Reading: Liquid Turbine Flow Meter

Mass flow controller, namely Mass Flow Controller (abbreviated as MFC). Not only has the function of a mass flow meter. More importantly, it can automatically control the gas flow. That is, users can set the flow rate according to their needs. MFC automatically keeps the flow constant at the set value. Even if the system pressure fluctuates or the ambient temperature changes, it will not deviate from the set value.

Simply put, the mass flow controller is a steady flow device. It is a gas steady flow device that can be set manually or automatically controlled by connecting with a computer.

Extended reading: Mass Flow Rate Units Converter

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, and does not require temperature and pressure compensation.

Read more.

Read more about: Coriolis Mass Flowmeter Working Principle

The mass flow controller is composed of a flow sensor, a diverter channel, a flow regulating valve and an amplifying controller.

The flow sensor uses the principle of capillary heat transfer thermometry to measure the mass flow of gas (without temperature and pressure compensation). The flow signal measured by the sensor heating bridge is sent to the amplifier to be amplified. The amplified flow detection voltage is compared with the set voltage. Then the difference signal is amplified to control the regulating valve. Closed loop control of the flow through the channel to make it equal The set flow is equal.

The flow divider determines the flow of the main channel. The flow indicator matched with the mass flow controller is equipped with a regulated power supply, a digital voltmeter, setting potentiometer, peripherals, internal conversion and three-position valve control switch, etc.

Extended reading: What is an air pressure transducer?

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Mass Flow Meters

Mass flow meter directly measures the mass flow of the medium passing through the flow meter…

Sino-Inst offer over 5 liqiud Mass Flow controller with Best Price.

A wide variety of liquid Mass Flow controller options are available to you, such as free samples, paid samples.

Sino-Inst is liquid Mass Flow Meters and controller suppliers, located in China. Mass Flow Meters products are most popular in North America, Mid East, and Eastern Europe.

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.

Features of Gas mass flow controller

  • The standard minimum flow rate of the micro gas mass flowmeter is 2ml/min. Chlorine, air, and compressed air can reach it. Some gases with a low C.F coefficient can be measured even lower
  • The standard accuracy of the gas mass flowmeter is 0.5%. 1.0% reading, 0.5% full scale accuracy, repeatability 0.2%. The accuracy of the controller is 1.0% (full scale)
  • The flowmeter’s turndown ratio is 1:100
  • The valve control range of the controller is 1:50
  • The minimum can measure 2sccm, the maximum can reach 3000slm
  • The base material of the flowmeter and controller is SS316L. The material in contact with the gas is also SS316L. It can measure some weakly corrosive gases.
  • The leak rate of the flow meter and controller is 1×10-SCCSHe.
  • Sealing material is chloro rubber, oxyprene butadiene rubber

Specifications of Gas mass flow controller

MediumSuitable for gas, weakly corrosive gas. For example: nitrogen, air, not suitable for ammonia
Precision+/-1.5%F.S
Linear+/-0.5%F.S
Repeatability+/-0.2%F.S
Response time<2.0S
communicationRS232/485, MODBUS
Output0~5V, 1~5V, 4-20mA
powered by+/-15VDC,24VDC
temperature0~50℃
Work pressurePressure difference: 0.1~0.5Mpa
Maximum withstand voltage3Mpa/10Mpa
Electrical InterfaceDB15 hole
Leak rate1×10·SCCSHe
Temperature Coefficient+/-0.025%F.S/℃C
Base materialSS316L
Seal materialFluorine rubber, neoprene rubber, nitrile rubber
Connector8,010,012

Extended reading: Cryogenic Liquid Nitrogen Flowmeters

Gas mass flow controller working principle

The mass flow meter uses the principle of capillary heat transfer thermometry to measure the mass flow of gas (without temperature and pressure compensation).

The flow signal measured by the sensor heating bridge is sent to the amplifier for amplification. The amplified flow measurement voltage is compared with the set voltage.

Then amplify the difference signal to control the regulating valve. Through closed-loop control to control the flow-through, and make it equal to the set flow. The flow divider determines the flow of the main channel.

The picture shows the working principle diagram of the MFC and the flow indicator connected:

The detected voltage of the flow rate output by the controller is directly proportional to the quality of the gas flowing through the channel. The full-scale detection output voltage is 5VDC. The detection range of the gas mass flow controller is 2~100% full scale (the turndown ratio is 50:1) The flow resolution is 0.1% of full scale.

Note: When the “valve control” line of the gas mass flow controller is set to the “cleaning” position, it can also be used as a gas mass flow meter. At this time, the output value of the flow detection output voltage may reach more than 10VDC.

It should be noted that once the output voltage exceeds 5VDC, the flow detection voltage and the actual flow rate are not linearly corresponding.

When cleaning, the flow rate display is inaccurate. Moreover, the flow rate may increase and the display decrease. But these will not damage the mass flow controller.

Extended reading: Mass Flow Rate vs Volumetric Flow Rate

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Liquid mass flow controller for process liquid -Sino-Inst

The liquid mass flow controller can quickly and accurately measure the volume flow/mass flow of the process liquid quickly and accurately.

  • Product SKU: Liquid mass flow controller
  • Product Brand: Sino-Inst
  • Product Currency: USD
  • Product Price: 900
  • Price Valid Until 2099-09-09
  • Product In-Stock: PreOrder

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Common types of flow controller MFC

  1. Positive displacement flow meter, also known as fixed displacement flow meter.

It uses mechanical measuring elements to continuously divide the fluid into a single known volume part. The fluid volume flow rate is measured according to the number of times that the measuring chamber is filled and discharged with the volume part of fluid successively.

  1. Float type flowmeter, also known as rotameter.

It is a kind of variable area flowmeter. In a vertical tapered tube that expands from bottom to top. The gravity of a float with a circular cross-section is borne by the hydrodynamic force. So that the float can rise and fall freely in the cone tube.

Read more about: Rotameter flow meter-Variable Area Flow Meters. Suitable for liquid and gas volumetric flow measurement and control.

  1. Differential pressure type flowmeter.

It is based on the differential pressure generated by the flow detector installed in the pipeline. Known fluid conditions and the size of the test room and pipeline to calculate the flow of the meter.

  1. Vortex flowmeter.

A non-streamline vortex generator is placed in the fluid.
The fluid is alternately separated on both sides of the generator to release two series of regularly staggered vortex meters.

Extended reading: Threaded Vortex Nitrogen Gas Flow Meter

  1. Turbine flowmeter.

It is the main type of velocity flow meters. It uses a multi-blade rotor (turbine) to sense the average flow velocity of the fluid. In order to derive the flow or total meter.

  1. Ultrasonic flow meter.

A meter that measures the flow rate by detecting the effect of fluid flow on the ultrasonic beam (or ultrasonic pulse).

  1. Electromagnetic flowmeter.

Electromagnetic flowmeter is an instrument for measuring conductive liquid made according to Faraday’s law of electromagnetic induction. Electromagnetic flowmeter has a series of excellent characteristics. It can solve the problems that other flowmeters are not easy to apply, such as the measurement of dirty flow and corrosive flow.

  1. Thermal flow meter.

The thermal flow meter sensor contains two sensing elements. A speed sensor and a temperature sensor.

They automatically compensate and correct for gas temperature changes.

The electric heating part of the instrument heats the speed sensor to a certain fixed value higher than the temperature of the working condition. A constant temperature difference is formed between the speed sensor and the sensor that measures the temperature of the working condition.

When the temperature difference is kept constant, the energy consumed by electric heating can also be said to be the heat dissipation value. It is proportional to the mass flow rate of the gas flowing through it. It is suitable for the measurement of single gas and fixed ratio multi-component gas.

  1. Coriolis flowmeter.

The principle is to use the Coriolis force generated when the fluid flows in the vibrating tube. The force is measured directly or indirectly to obtain the fluid mass flow rate.

Extended reading: Flow Totalizer F3000X for Data collection and calculation

Frequently
Asked
Questions

What we usually call a mass flow controller, its full name is a thermal gas mass flow controller, or MFC for short.

The full name of mass flow meter is thermal gas mass flow meter, referred to as MFM.

They are an instrument that precisely measures gas flow. Its measured value will not be inaccurate due to changes in temperature or pressure.

A mass flow meter is a meter for measurement and monitoring. The mass flow controller not only has the function of mass flow meter. More importantly: it can automatically control the flow of gas. That is to say, the user can set the flow rate according to the needs of the situation. The flow controller automatically keeps the flow constant at the set value. Even if the system pressure fluctuates or the ambient temperature changes, it will not deviate from the original set value.

Simply put, a mass flow controller is a steady flow device. It is an automatic control gas flow stabilization device that can be manually set or connected with a calculator.

In general, if only the gas flow is measured or monitored, a mass flow meter can meet the requirements.

And if it is necessary to control the gas flow, a mass flow controller is required.

In some measurement occasions, both can be used. Such as the measurement of capillary flow capacity, when measuring flow at constant pressure, use a mass flow meter. When measuring constant flow and pressure, a mass flow controller is required.

Note that when the mass flow controller is in the cleaning state, it can also be used as a mass flow meter. It’s just that the pressure drop is larger than that of ordinary mass flow meters.

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sccm: standard milliliters/minute; slm: standard liters/minute

Standard conditions: temperature – 273.15K (0 ℃) pressure – 101325Pa (760mmHg)

F.S (Full Scale) means full scale

Thermal mass flow controllers/mass flow meters directly measure the mass flow of gases. Density dynamic detection. No compensation is required. Volumetric flow can also be measured directly.

The volume flowmeter can only measure the volume flow directly, if you want to measure the mass flow, if you give a fixed density value during configuration. This makes it impossible to detect density dynamically. Less accurate.

Mass flow controllers/flowmeters measure gases that are not affected by temperature and pressure.

Mass flow controller MFC not only has the function of mass flow meter. What’s more, it can automatically control the gas flow. The flow rate can be set according to actual needs.

The MFC automatically keeps the flow constant at the set value. Even if the system pressure fluctuates or the ambient temperature changes. It will not deviate from the error range of the set value.

Mass flow controllers can be used to control all kinds of gases. Including corrosive gases and special gases.

But pay attention to the use of corrosive gases and special gases. Proper selection of model and seal material is required.

When ordering, the user needs to declare the gas to be used. In order to avoid serious losses due to wrong selection or selection of sealing materials.

Usually, the wet material of the mass flow controller contacting the working gas is 316L stainless steel, polytetrafluoroethylene and sealing materials. Sealing materials are divided into two categories: metal seals and rubber seals. Metal seal materials are generally corrosion-resistant materials such as stainless steel, gold or nickel.

The MFC with metal seal can be used for any gas in principle, including various corrosive gases and special gases.

For strong corrosive gases such as boron tribromide, boron trichloride, and hydrogen fluoride, and metal oxide gases used in MOCVD, it is recommended to use a metal-sealed MFC.

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Sino-Inst is a manufacturer of Gas Mass Flow Controllers for Measurement of Gas. It has an accumulation function, and can operate in timing accumulation or quantitative accumulation mode respectively. After the accumulation amount is reached, the flow controller will stop automatically, which is convenient for various experimental research occasions application.

Sino-Inst Gas Mass Flow Controllers not only have the function of a mass flow meter. More importantly, it can automatically control the gas flow. That is, the user can set the flow according to the needs, and the MFC will automatically keep the flow constant at the set value. Even If the system pressure fluctuates or the ambient temperature changes, it will not deviate from the set value.

The mass flow controller is a steady flow device, which is a gas steady flow device that can be manually set or automatically controlled by connecting with a computer.

The measurement range of Sino-Inst Gas Mass Flow Controllers is wide, from full scale 5ml/min to 1500 liters/min. There are also many gas media that can be measured, suitable for general nitrogen, air, carbon dioxide, hydrogen and other gases. According to the communication method It is different, divided into 0-5V or 4-20mA analog type and RS485modbus digital type. The withstand voltage of the product is divided into 10Mpa, 5Mpa and 3Mpa according to the flow rate.

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 a Gas Mass Flow Controller, level sensors, or other equipment, please give us a call.

Magnetic flow meter calibration

Why is magnetic flow meter calibration necessary?

The accuracy of the magnetic flowmeter has been calibrated by the calibration line when it leaves the factory. However, at the use site, due to environmental conditions, fluid characteristics, and instrument damage such as component damage. It often causes instrument operation failures. Therefore, the electromagnetic flowmeter needs calibration. Ensuring accurate flow meter performance is an inestimable part of business planning and costing.

2 Magnetic flow meter calibration methods

At present, there are 2 solutions for Magnetic flow meter calibration: direct and indirect.

Direct Magnetic flow meter calibration is the excitation coil inspection method. This method is also known as the “dry standard” method of electromagnetic flowmeters. Indirect calibration is the external clamp-on ultrasonic flowmeter calibration method. Also known as the “non-contact measurement method”.

However, in the “dry standard” method, the standard coil is directly designed into the meter body of the flowmeter. The performance of its resistance and other indicators cannot be traced regularly.

As a result, it is impossible to determine whether the measurement characteristics of the standard coil change after a period of time. Therefore, “dry standard” is difficult to effectively realize the traceability of the value.

Compared with the “dry standard” method of detection. The external clamp ultrasonic flowmeter is capable of non-stop flow and non-cutting of pipes. The advantages of on-site Magnetic flow meter calibration are not affected by the temperature, pressure, and density of the fluid being measured.

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Magnetic flow meter calibration procedure

Clamp-on ultrasonic flowmeter calibration electromagnetic flowmeter

Calibration method: non-contact measurement method. That is, the external ultrasonic flowmeter is clamped on the pipe of the measured flowmeter. By comparing the cumulative flow error of the two flowmeters. Determine the measurement characteristics of the flowmeter being inspected.

The external ultrasonic flowmeter calibration method is used for on-site calibration. The inspector should first check whether the input of the key parameters that affect the accuracy of the measurement built in the flowmeter converter is correct.

Ask the staff about the daily flow rate, and observe and calculate the average flow rate of the flowmeter over a period of time.

Big data compared with standard equipment in the laboratory according to the standard table. Enter the pipe diameter of the standard meter and the flow meter to be inspected. Calibration coefficients, outer diameter, wall thickness and other parameters similar to the flow rate. According to the flowmeter’s online operating instructions on-site actual measurement input.

The cumulative flow method is used when calculating the indication error. Read the cumulative value of the flow of the standard meter and the meter under inspection for a certain period of time in three times. As the standard value of the measurement standard meter and the displayed value of the tested flow meter. Each measurement time is 30min.

Conditions permit or when the flow rate changes significantly within a day. Three flow points with obvious differences can be measured.

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Real flow calibration electromagnetic flowmeter

How do you calibrate a magnetic flow meter?

  • Select the corresponding pump according to the pipe diameter and flow rate for the verification test;
  • If the system uses compressed air power. Turn on the air compressor to reach the air source pressure required by the system. To ensure the rapid switching of the commutator and the normal operation of the clamp meter;
  • After the flowmeter is correctly installed and connected. It should be energized and preheated for about 30 minutes under the requirements of the verification regulations;
  • If the high tank water source is used, check whether the overflow signal of the stabilized water tower appears.
  • Before the formal test. According to the requirements of the verification regulations, use the verification medium to circulate the time in the pipeline system. At the same time, check whether there is any leakage in the sealing parts of the pipeline;
  • Before starting the formal verification, the verification medium should be filled with the flowmeter sensor to be tested. Then turn off the downstream valve to adjust the zero position;
  • When starting the verification, first open the valve at the front of the pipeline. Slowly open the valve behind the flow meter under test to adjust the flow at the verification point.
  • During the calibration process, the flow stability of each flow point should be within the 1% ~ 2%-flow method, while the total amount law can be within 5%. When completing the verification process of a flow point, the temperature change of the verification medium should not exceed 1℃. When completing all the verification processes, it should not exceed 5℃. The pressure downstream of the inspected flowmeter should be high enough to ensure that no flashing and cavitation occur in the flow pipeline (especially in the reduced diameter);
  • After each test, the valve at the front end of the test pipeline should be closed first. And then the pump should be stopped to avoid emptying the voltage stabilizing facility. At the same time, empty the remaining verification medium in the test pipeline. Then turn off the control system and the air compressor.

Extended Reading: Guide: Magnetic Flowmeter Installation

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Magnetic flow meter calibration frequency

The verification period for flowmeters with accuracy grades of 0.2 and better than 0.2 is 1 year. For flowmeters with accuracy grades lower than 0.2 and using quoted errors, the verification period is 2 years.

The electromagnetic flowmeter is a flowmeter that calculates the flow rate by setting a magnetic field perpendicular to the flow direction in a closed pipeline. By measuring the induced electromotive force generated by the movement of the conductive liquid in the magnetic field.
  
The National Metrological Verification Regulations of the People’s Republic of China JJG 1033-2007 “Electromagnetic Flowmeter” 7.4 The verification period stipulates: The verification period of the flowmeter accuracy level of 0.2 and better than 0.2 is 1 year. For the accuracy level less than 0.2 The maximum verification period for the current level and usage reference error is 2 years.

Extended reading: Ultrasonic Insertion Flow Meter for Lined/Large Pipes

Do magnetic flow meters require calibration?

Mainly depends on your working conditions. If the measurement requirements are high. There are more impurities and dirt in the fluid and poor environmental conditions. Electrode fouling affects the measurement. The measurement is inaccurate after cleaning and repair. It can be verified. If the working conditions are good, the long-term use is normal. No verification is necessary.

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Sino-Inst flow calibration device and electromagnetic flowmeter production test standard

The manufacture of high-quality electromagnetic flowmeters is inseparable from high-precision flow calibration devices. The flow calibration device is the standard equipment for measurement departments and flowmeter manufacturers for value transmission, traceability and verification testing.

The Sino-Inst team has developed and built a set of high-level water towers as a voltage stabilization source. The static mass method is combined with the standard meter method, and is dedicated to the calibration device of the electromagnetic flowmeter.

The device uncertainty is better than the first-class fluid flow device level of 0.05%. It has passed the appraisal and audit of the Shaanxi Metrology Institute.

The 35-meter-high, 200-cubic-volume water tower is designed with a special overflow device. The fluctuation of the water level and liquid level during calibration measurement does not exceed 8mm. A high stability of better than 0.01% is achieved.

The production of MFE needs to go through various performance tests in a standard laboratory by an authoritative engineer before it can be put on the market.

Electromagnetic compatibility test

Electrostatic discharge (ESD) immunity GB/T 17626.2/ICE 61000-4-2
Electrical fast transient/pulse group (EFT/B) immunity GB/T 17626.4/ICE 61000-4-4
Surge (lightning strike) immunity GB/T 17626.5/ICE 61000-4-5
Power frequency magnetic field immunity GB/T 17626.8/ICE 61000-4-8

Environmental test

High and low-temperature cyclic impact test GB/T2423.1 GB/T2423.2
Salt spray test GB/T2423.17 GB/T6458
Vibration and shock test GB/T2423.10
Hazardous Substance Testing (RoHS): X-ray fluorescence spectroscopy testing IEC62321

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Sino-Inst offer over 50 Magnetic Flow Meters, with Best Price.

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

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

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

How to find leaks using ultrasonic water flow meter?

Application

Ultrasonic water flow meter

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.

Leak detection method:

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.

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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.

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How does an ultrasonic flow meter work?

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.

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

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

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Sino-Inst, Manufacturer for Ultrasonic Water Flow Meters. It can measure even liquids such as water, seawater, oil, and slurry.

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.

3 inch (3″) Water Meter

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

  • Non-magnetic measurement. There is no problem of strong magnetic field attack;
  • GSM mode wireless meter reading. Convenient on-site construction and long transmission distance;
  • Remote measurement, segmented calibration. High measurement accuracy, with low voltage alarm function;
  • Freeze consumption records regularly and upload historical data. 96 records can be uploaded every day;
  • Ultra-low power consumption (static power consumption less than 10pA) design. High-definition LCD display;
  • The pipe section is a straight-through integrated structure manufactured by forging technology. It is strong and wear-resistant;
  • The measuring mechanism has no moving parts and will never wear out. The measuring accuracy is not affected by the service cycle;
  • Epoxy resin potting. Can work in water. Easy to install. Horizontal and vertical installation;

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3″ water meter flow rate

Caliber(mm)InchMeasurement grade Q3/Q1  
m³/h
Overload flow Q4
m³/h
Common flow Q3
m³/h
Boundary flow Q2
m³/h
Minimum flow Q1
m³/h
Minimum reading
Maximum reading
5025031.25250.80.50.001999999
655050401.280.80.001999999
8035078.75632.0161.260.001999999
1004501251003.220.001999999
125– 502001605.123.20.001999999
150650312.5250850.019999999
20085050040012.880.019999999
2501050787.563020.1612.60.0199999999
30012501250100032200.199999999
35014501750140056350.199999999
40016502000160051.2320.199999999
50020503125250080500.199999999
600245060003000600900.199999999

3″ water meter dimensions

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3″ Water Meter Pressure Loss

The specifications of 3″ Water Meter are as follows:

Executive standardCJ/T224-2006
Measurement accuracy levelClass B
Temperature classT30, T50, T70, T90
Pressure LevelMAP10
Pressure loss level△P63
Maximum allowable errora) Low area (Q1≤Q&lt;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 indicatorsBus power supply: external supply DC6.5V~18V
Working current: -5uA
Communication interface: RS-485 interface; MBUS interface
External power supply: 5~10V
technical standardThe 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

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3″ water meter with pulse output

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.

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Water meter types

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.

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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.  

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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.

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FAQ

The water meter is an instrument that measures the flow of water. Mostly it is the cumulative flow measurement of water.

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.

  1. 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.
  2. The water meter should be installed horizontally (display face upward).
  3. The sand, gravel, hemp and other sundries in the pipeline should be removed before new installation to avoid malfunction of the water meter.
  4. The direction of the arrow shown on the water meter should be consistent with the direction of water flow in the pipeline.
  5. 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.

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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.

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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.