What is Strap on Ultrasonic Flow Meters?

Strap on Ultrasonic Flow Meter is also often called Clamp On Type Flow Meter. The unique feature of Strap on Ultrasonic Flow Meter is that the sensor does not need to be in contact with the medium, which is different from other flow meters.

• Clamp on type, No need to cut the pipe or do any other changes.
• No professional product knowledge required, installation and measurement can be done based on the guide.
• No moving parts or pressure changes involved, installation can be done without stop provide.

Get a Quote Ultrasonic Flow Meters

Featured Strap on Ultrasonic Flow Meters

Strap on Ultrasonic Flow Meter Working Principle

The strap-on ultrasonic flow meters supplied by Sino-Inst are based on the working principle of the time difference method.

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

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

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

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

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

Strap on Ultrasonic Flow Meters Application

Sino-Inst concentrates on the development of flow measurement technology. The products serve real-time flow measurement and participation process control in the production process. The main customer industries are the chemical production process, fine chemical production, cleaning industry, beverage industry, etc.

With the world’s most advanced time measurement chip (time resolution of 50ps), Sino-Inst has developed a series of straps on ultrasonic flow meters.

It takes only 2-3 minutes to complete the whole process from installation to measurement. It also adopts the current popular OLED display, which makes it easy to read in low light conditions.

Strap on Ultrasonic Flow Meters is widely used in the production process flow measurement and monitoring. The application of the product continuously and effectively controls the flow of the fluid, so as to improve the yield of the product and even save the input of the personnel, bringing benefits to the production enterprise.

Strap on Ultrasonic Flow Meters can meet different pipe requirements: stainless steel pipe, carbon steel pipe, copper pipe, plastic pipe(PVC, PVDF, PPR, PPH, HDPE, etc.).

Extended reading: non contact flow meter

Strap on Ultrasonic Flow Meters also satisfies different clean fluid measurements: various acids, alcohols, chemical solvents, alcohol, beverage water, Coca-Cola water, etc. Strap on Ultrasonic Flow Meters output signal, such as 4-20mA. The flow signal can be connected to a paperless recorder. Carry out multi-channel flow signal monitoring. What Is A Paperless Recorder?

Extended reading: Fluid flow meter types

Extended reading: Battery operated electromagnetic flow meter-GRPS-new irrigation water flow meter

Installation Guidelines

Frequently
Asked
Questions

Help Center

How accurate are clamp-on flow meters?

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

High Accuracy measuring:

Linearity: better than 0.5%, Repeatability: better than 0.2%, Accuracy: better than ±1% 

Extended reading: Ultrasonic flow detectors types

What are the different types of ultrasonic flow meters?

Classification of ultrasonic flowmeters.

1. According to the measurement principle

(1) Time difference method ultrasonic flowmeter;
(2) Frequency difference method ultrasonic flowmeter;
(3) Phase difference method ultrasonic flowmeter;
(4) Doppler ultrasonic flowmeter;
(5) Ultrasonic flowmeters for partially full pipes and river channels that combine liquid level measurement and average flow velocity measurement.

More about Different Types of Flowmeters – Technical and Application Analysis

2. According to the way of use

(1) Portable ultrasonic flowmeter;
(2) Fixed (standard pipe section) ultrasonic flowmeter.

3. According to the installation method of the transducer

(1) Standard pipe section ultrasonic flowmeter;
(2) Clip-on ultrasonic flowmeter;
(3) On-site hole-opening plug-in ultrasonic flowmeter.

Read more: Insertion Type Ultrasonic Flow Meter Applications

4. According to whether the transducer is in contact with the fluid

(1) Immersion (contact) ultrasonic flowmeter;
(2) Non-invasive (non-contact) ultrasonic flowmeter.

5. According to the nature of the measured fluid

(1) Liquid ultrasonic flowmeter;
(2) Gas ultrasonic flowmeter.

6. According to the number of transducer channels

(1) Mono ultrasonic flowmeter;
(2) Two-channel ultrasonic flowmeter;
(3) Multi-channel ultrasonic flowmeter.

Extended reading: High Pressure Rotameter for Liquids/gas-Upto 25 Mpa

What is the main function of the ultrasonic Doppler meter?

Doppler ultrasonic flowmeter is widely used in industry, water conservancy, irrigation, and other industries. It is suitable for flow measurement of full pipe, partial pipe, open channel, etc.

(1) Branch channel flow monitoring (narrow channel)

Water distribution in the irrigation area requires real-time monitoring of the branch canal water level and flow. The traditional method is to measure the water level method. This method has high civil construction costs. The monitoring efficiency is low. The measurement accuracy is not enough.

Doppler ultrasonic flowmeter solves the problem of water measurement in-branch canals in irrigation areas.

Just fix the probe at the bottom of the channel. The device automatically measures the channel water level, flow area, and flow rate in real-time and calculates the instantaneous flow and cumulative flow. The flow rate measurement accuracy can reach ±1%+±1cm/s.

(2) Main channel flow monitoring (wide channel)

The difference between the main canal and the branch canal is that the width of the main canal is wider. Therefore, it is necessary to install multiple sets of Doppler ultrasonic flowmeters to accurately measure the flow velocity at different positions of the section during the operation.

The flow of the entire channel can be accurately measured through the integration method. This method is also applicable to some wide rivers.

(3) Monitoring of urban drainage pipeline flow

With the implementation of smart municipal administration, in order to monitor the operation of urban drainage pipe networks, municipal departments need to monitor the water level and flow of drainage pipes in real-time.

Through the analysis of the water level and flow data, the problems of siltation, overload, overflow, and abnormal water infiltration in the pipeline can be distinguished.

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

Extended reading: metal tube flow meter

Sino-Inst, Manufacturer for Strap on Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of DN 5—6000mm. It can measure even liquids such as water, seawater, oil, and slurry.

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

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

What is 4-20ma Flow Meter?

4-20mA Flow Meters are those flow meters with 4-20mA current signal output function. The signal current of general instruments is 4-20mA. This means that the minimum current is 4mA and the maximum current is 20mA. Our commonly used electromagnetic flowmeters, turbine flowmeters, mass flowmeters, gas flowmeters, etc. all have the function of 4-20mA signal output.

Get a Quote Digital Flow Meters

What is a 4-20mA Output？

The signal current of general instruments is 4-20mA, which means that the minimum current is 4mA and the maximum current is 20mA.

The industry generally needs to measure various non-electrical physical quantities. For example, temperature, pressure, speed, angle, etc. They all need to be converted into analog electrical signals before they can be transmitted to the control room or display equipment hundreds of meters away. This device that converts physical quantities into electrical signals is called a transmitter. The most widely used in the industry is to use 4-20mA current to transmit analog quantities.

In the industrial field, to complete signal conditioning and long-term transmission, the following problems will occur:

1. Since the transmitted signal is a voltage signal, the transmission cable will be interfered by noise;
2. The distributed resistance of the transmission cable will produce a voltage drop;
3. How to provide the working voltage of the instrumentation amplifier in the field is also a problem.

In order to solve the above problems and avoid the influence of related noise, we will use current to transmit signals. Because the current is not sensitive to noise.

The 4-20mA current loop uses 4mA to represent the zero signal. Use 20mA to represent the full scale of the signal. The signals lower than 4mA and higher than 20mA are used for various fault alarms.

Why Choose 4-20mA Instead of 0-20mA for the Flowmeter?

Many people will certainly ask: Why choose 4-20mA instead of 0-20mA?
Very simple, if 0 is the smallest, then the open circuit fault will not be detected!

So, why is it 4mA?
During normal operation, the current signal will not be lower than 4mA.
When the transmission cable is broken due to a fault, the loop current drops to zero. 2mA is often used as the disconnection alarm value.
There are two reasons. One reason is to avoid interference. Another reason is that a two-wire system is used at 4-20mA. That is, the two wires are the signal wires. It is also a power cord. And 4mA is to provide the static working current of the circuit to the sensor.

Extended Reading: Mechanical flow meter for diesel

How Does This 4-20mA Control Loop Work?

4-20mA constitutes the basic elements:

• 24V power supply
• The transmitter controls the 4-20mA signal to change in proportion to the process variable
• The indicator converts the 4-20mA signal into the corresponding process variable
• Indicator or controller I/O input resistance 250Ω shunt generates 1-5V input signal (Ohm’s law: voltage = current * resistance, 4-20 mA X 250 ohms = 1-5V)

Usually:

1. They convert the temperature signal of the thermocouple or thermal resistance sensor into a 4-20mA signal and then output;
2. The controller then translates 4-20mA into a specific temperature value;
3. Based on this temperature value. The control loop realizes the control of the process terminal control element.

Similarly, the pressure transmitter is in the control loop. Usually used to measure the pressure value of the process medium:

1) The sensor senses pressure. The transmitter converts the signal into 4-20mA signal;
2) The controller then reversely translates the 4-20mA signal into a pressure value;
3) The controller is based on the pressure value. Send instructions to the valve. Control valve opening to realize safety valve control. Ensure that the container does not generate dangerous pressure.

Extended reading: Orifice Plate Flow Meter

Water Flow Meter 4-20ma Output

A Digital Water flow meter is a flow meter that can display the water flow rate, and have the output for the flow rate. Like 4-20mA output, HART, RS 485, and so on. Digital Water Flow Meter is also called Electronic Water Flow Meter. Digital Water Flow Meter is widely used in industrial water and household water measurement. Most of the Sino-Inst flow meters are digital water flow meters. Like the electromagnetic flowmeter, Portable ultrasonic flow meter, Turbine flow meter…..

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

Read More About: Paperless Recorder Working Principle

Flow Meter with Analog Output

The analog flow meter is a flowmeter with the analog output signal. Analog output is a common function of flow meters. The analog signal is mainly used to output the flow signal to the next control system.

The analog signal refers to the continuous signal of the information parameter in a given range. The characteristic quantity of the information of the analog signal can be transformed into an arbitrary numerical signal in an instant. In the process of transmitting analog signals, the information signals need to be converted into electric wave signals, which are then transmitted through wired or wireless methods.

Analog signal: poor confidentiality, weak anti-interference ability.

Digital signal: strong anti-interference ability and good communication confidentiality.

Read more about Analog Flow Meters.

Turbine Digital Flow Meter

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

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

Turbine Flow Meter reference price: USD 200-1700/pc.

4-20ma Air Flow Meter

A digital air flow meter refers to a flow meter that can accurately measure air or compressed air inline. Industrial Digital air flow meters can be divided into mass flow meters or volume flow meters.

Read more about Digital air flow meters.

Related Blogs

Looking for 4-20ma flow meters? The flow meter is a fast, accurate, and reliable permanent linear motion. In Sino-Inst, you can also find other good deals on measurement and analysis instruments and tools! Keep an eye out for promotions and deals, so you get a big saving of 4 20ma flow meters. You can shop for 4 20ma flow meters at low prices.

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

There is a wide variety of 4-20ma flow meter items you can buy, such as turbine water flow meters, ultrasonic flowmeters. Common materials used for 4 20ma flow meters are stainless steel and carbon steel.

Sino-Inst offers over 50 4-20ma flow meters for flow measurement. About 50% of these are differential pressure flow meters, 40% are the liquid flow sensor, and 20% are Ultrasonic Level Transmitter and mass flow meters.

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

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

Request a Quote

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

You may have heard of flow transmitters and flow meters. Are flow transmitter and flow meter the same? What is the difference and relationship between them before? Should you buy a flow meter or a flow transmitter? What kind of one to buy?

Let us discuss both flow meter and flow transmitters individually to you understand their concepts thoroughly.

Get a Quote More Flow Meters

What is a Flow Meter?

A flow meter is an instrument used to measure the flow of fluid in a pipeline or open channel. It measures the flow of fluids, liquids, or gases through a closed transmission system.

Flow meters are divided into differential pressure flow meters, rotor flow meters, throttling flow meters, slit flow meters, volumetric flow meters, electromagnetic flow meters, and ultrasonic flow meters. Classified by medium: liquid flow meter and gas flow meter.

Extended reading: Ultrasonic Flow Meters Types & Technical Guide

These different flow meters have different functional principles. For example, an orifice flowmeter calculates the fluid flow at the entrance cross-section of a narrow, restricted opening (called an orifice) and the exit cross-section of the orifice. On the other hand, a rotameter-type flow meter can measure the volume flow inside multiple tubes placed in different areas of the transfer tube.

The above is a general introduction to the flowmeter. simply put. We can think that the flow meter is composed of two parts: the sensor and the signal processor. This structure can be installed separately or as a whole.
So, the signal processing part here is the Flow Transmitter we are going to talk about next.

Extended reading: How does a rotameter work

What is a Flow Transmitter?

The flow transmitter is an important part of the flowmeter. It is a flow meter with an integrated circuit as its operating system. In the flow transmitter, the flow measurement activity is executed by the electronic circuit after receiving the command from the operator. Since flow transmitters have electronic circuits, these devices can be used to control and monitor fluid flow.

Read more about: Flow Meters With GPM Units

For example, the following picture group is the flow transmitter of our common electromagnetic flowmeter.

Guess you like: What is Reynolds number?

Working Principle of Flow Transmitters

A transmitter (transmitter) is a converter that converts the output signal of the sensor into a signal that can be recognized by the controller. It can also convert the non-electricity input from the sensor into an electrical signal and amplify the signal source for remote measurement and control.

There are many types of transmitters. The transmitters used in industrial control instruments mainly include temperature transmitters, pressure transmitters, flow transmitters, current transmitters, voltage transmitters, and so on. Among various types of instruments, transmitters have the most extensive and common applications.

Therefore, the flow transmitter converts the flow signal collected from the flow sensor into an electrical signal. The various electrical signals that have been converted are used to facilitate the reception and transmission of other instruments or control devices. Through the electronic circuit again. Unify the electrical signals from the sensors. Converted to standard 4-20MA.

For example:
The mass flow meter directly measures the mass value. The flow transmitter displays the volume value. This is the biggest difference! The output of the flow transmitter is 4~20MA, and the pressure can be directly displayed by connecting to the secondary meter.

Read more about What is a Flow Transmitter? on Instrumentation Forum.

Extended reading: rotameter applications

Differences between the Flow Meter and Flow Transmitter

The following are some important differences between flow transmitters and flow meters.

Extended Reading: Magnetic Battery Operated Flow Meter

Flow transmitter types

In fact, there is no strict classification of flow transmitters. The flow transmitter can be configured according to the customer’s functional requirements.
For example, customers need a digital display, 4-20mA output, integrated.
Or, the customer needs battery power. Digital display. No signal output.

Extended reading: Gas Rotameter Tips

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

Flow transmitter calculation

The calibration methods and calibration requirements of flow transmitters with different functions are different. It is recommended that you check with the manufacturer before calibrating the flow transmitter. For example, the flow transmitter supplied by Sino-Inst has a key calibration function. Simple and easy to operate.

For another example, there are two calibration methods for common electromagnetic flowmeters. You may be reading: Magnetic flow meter calibration

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

Applications of Flow Transmitters

Flow transmitters are commonly used in various industries, including but not limited to:

• Food & Beverage
• Industrial production process
• Environmental protection project: Water and wastewater
• Pulp & paper
• Pharmaceutical
• Biotechnology
• Oil & Gas
• Energy metering
• Metals and Mining
• Marine
• Power & Utilities
• Transportation
• Chemical
• Textile
• Building Automation
• Micro Electronics
• Biotechnology
• Marine meteorology, rivers and lakes

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

Extended reading: High Pressure Rotameter for Liquids/gas-Upto 25 Mpa

Related blogs

Sino-Inst offers over 50 Flow Transmitters, with the Best Price.

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

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

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

Request a Quote

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

What is a low flow meter?

Low Flow Meters refer to those flow meters that can be used to measure micro-flow-low-flow rate media. Including metal rotor type, gear type, electromagnetic type microflow meter, microturbine type, and thermal type small mass flow meter. It can measure the Low flow rate of a variety of liquids and gases. For example, it needs small volume, high-temperature resistance, low-temperature resistance, or medium viscosity. etc. We all have suitable product recommendations.

Get a Quote More Flowmeters

Sino-Inst specializes in low flow meters for micro to low flow rates. We offer:
Ultrasonic flowmeter can measure low flow rates from 0.1m/s to 5.0m/s.
The gear flowmeter can measure the microflow rate from 0.01 to 0.83.
Coriolis mass flow meters and controllers from 10SCCM~30SLM.
Below, we also introduce a lot of flow meters. based on vortex, electromagnetic, ultrasonic, and positive displacement, etc.

Flow range of flow meters

First, let’s take a look at the low flow rate measurement range of conventional flow meters.

Read more about: The Pros and Cons of Micro Motion Flow Transmitters

Low flow meters for Liquids

Model	Measure Range    L/H	Measure Range L/min
GF02	0.6-50	0.01~0.83
GF04	5-250	0.083~4.16
GF06	10-500	0.167~8.33
GF10	50-1200	0.83~20
GF15	200-3000	3.33~50
GF25	1000-12000	16.67~200
GF32	2000-20000	33.33~333

Product	Strap on Flowmeter
Model	X3
Flow range	0.1m/s~5.0m/s
Accuracy	±2.0%
Repeatability	0.80%
Pipe size	φ6.35~φ90

Moeld	X3-φ6.35	X3-φ9.53	X3-φ12.7	X3-φ15	X3-φ20	X3-φ25
Weight(KG)	0.91	0.91	0.9	0.9	0.84	0.84
Moeld	X3-φ32	X3-φ40	X3-φ50	X3-φ63	X3-φ75	X3-φ99
Weight(KG)	0.82	0.88	0.98	1.43	1.52	1.95

Caliber （mm）	Measuring range （L/min）	Factor
1.15mm	0.035-1.6	0.5
1.3mm	0.01-1.86	0.6
1.5mm	0.045-2.08	0.67
2.0mm	0.085-2.32	1.02
2.5mm	0.12-2.4	1.44

Technical parameter

Material	Shell: brass nickel plated/brass/plastic Bearing: INO×18/8 (1.4305) stainless steel Impeller: PVDF (polyvinylidene fluoride) Magnet: SrFeO ceramic, ultrasonic welding
seal	MVQ (silicone rubber “O” ring)
temperature range	-10℃~+100℃
Accuracy class	±2%
Repeat accuracy	±0.20%
Pressure range	Maximum 2MPa
Installation method	Horizontal installation
Dimensions (L×B×H)	40×55×40mm
connect	MPM connector
Provide power	4.5~24VDC
Output	Open collector
Maximum (extra) voltage output	25VDC
Maximum current output	25mA
Thread	G1/8 or G1/4

Pipe diameter:	DN6mm—50mm (threaded type)
Accuracy:	±0.2/ ±0.5/ ±1.0 (liquid flow meter); ±:	-196°C to +700°C.
pressure:	Negative pressure -70Mpa
Measuring range ratio:	1:100 times; 1:50 times; 1:30 times; 1:10 times
Flow range:	Liquid: DN6 to DN80 starting at 0.1L/h (ultra-small flow); Gas: DN6 to DN80 starting at 15L/h (ultra-small flow);

Extended Reading: Liquid Turbine Flow Meter

Measuring range	Low range: 10SCCM~30SLM Medium range: 30SLM~300SLM Large range: 500SLM~3000SLM
Accuracy (under standard conditions after zero adjustments)	±1%F.S
Repeatability	±1%F.S
Zero drift & full-scale drift	0.02%F.S/C/Atm
Working range/range adjustable ratio	2%~100%F.S/50:1
Maximum measurable flow	100%F.S (controllable)
Typical response time	200 milliseconds (adjustable)
Start-up warm-up time	<5 seconds

Extended reading: Micro flow meters for low flow liquids

Low flow meters for Gas

Model	Caliber	Mechanical interface	FLow Range: SLPM	FLow Range: NCMH
MF5706	6mm	1/4″	10 25	0.6 1.5
MF5712	12mm	1/2″	200	12

Measuring medium:	Various gases (except acetylene gas and mixed gas)
Measuring pipe diameter:	DN3, 6, 8, 10
Flow range:	30, 60, 80, 100, 300, 600, 800, 1000 sccm; 10, 20, 30, 50, 80, 100 SLPM
Flow measurement accuracy:	±1.5%FS; ±2.5%FS
range of working temperature:	-25℃-55℃
Working pressure range:	0.3MPa, 0.6MPa, 1.0MPa
Power supply:	24VDC±10%;
output signal:	4-20mA, RS485 communication;

Read more about: Benefits Of Digital Gas Mass Flow Meters

FAQ

Related articles:

Extended reading: Gas Rotameter Tips

Sino-Inst, Manufacturer for Low Flow Meters. For example crude oil flow meter, diesel flow meter, gasoline flow meter.

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

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com

A gear flow meter is a common positive displacement flow meter. The gear flow sensor has built-in double gears to operate. The volume of the medium is calculated by the volume of the gear. The flow rate of the small fluid medium is measured.

• It can measure fluids with a viscosity of up to 10000 Pa.s.
• The lowest flow rate can be measured 0.6L/H. That is 0.0026 GPM.

Gear flow meters can be used for resin and glue flow measurement. Flow measurement of hydraulic oil, lubricating oil, and grease. Maltose, syrup. Fuel oil flow measurement. Flow measurement of ink and asphalt. Flow measurement of liquid nitrogen, freezing liquid, and solvent. Edible oil, fish oil, and food filling measurement. Chemical and anti-corrosion requirements fluid measurement. A fluid quantitative control system, etc.

Get a Quote More flowmeters

What is gear flow meter?

The gear flowmeter is a positive displacement flowmeter. It is a high-precision transmitter for measuring volumetric flow. It uses two or more elliptical gears to rotate at right angles to each other to form a T shape. With the flow of the medium, the gears mesh and rotate. Under the action of the fluid flow, a pressure difference is formed at both ends of the instrument inlet and outlet. No power supply is required. A pair of gears rotate freely. The cavity between the gears is filled with liquid. The liquid is discharged as it rotates. Measure the number of revolutions of the gear to know the flow rate of the liquid flowing through the instrument.

Gear flow meters are used to accurately measure the flow or instantaneous flow of liquid in the pipeline continuously or intermittently. It is especially suitable for the flow measurement of Maltose, syrup. heavy oil, polyvinyl alcohol, resin, and other high viscosity media.

There are various types of gear flow meters, mainly named after the shapes of internal components. For example, the circular gear flowmeter we will introduce in this article. There are also common oval gear flow meters, helical flow meters, etc.

Oval gear flowmeter
The oval gear flowmeter uses two oval gears to mesh and rotate. It is suitable for flow measurement of medium with higher viscosity.

Extended reading: Positive displacement flow meter working principle

Helical flow meter
The metering part of the spiral rotor flowmeter is mainly composed of a metering box and a pair of uniquely designed spiral rotors.

Extended reading: Cylinder Gear flow meter for micro flow measurement.

Circular gear flowmeter (spur gear flowmeter)
The circular gear flowmeter uses two circular gears to mesh and rotate. Suitable for microflow measurement.

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

Gear flow meter

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

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

It can measure fluids with a viscosity of up to 10000 Pa.s.
The lowest flow rate can be measured at 0.6L/H. That is 0.0026 GPM.

Extended reading: Micro flow meters for low flow liquids

Gear flow meter working principle

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

With the flow of the medium, the gears mesh and rotate. Under the action of the fluid flow, a pressure difference is formed at both ends of the instrument inlet and outlet. There is no need for a power supply. A pair of gears rotate freely. The cavity between the gears is filled with liquid. Discharge and measure the number of revolutions of the gear to know the flow of liquid and liquid flowing through the instrument.

Extended reading: Fluid flow meter types

The rotation speed of the round gear transmitter is detected by the sensor coil in the signal amplifier mounted on the watch case. The signal amplifier is not in contact with the measured medium. When the transmitter gear cuts the magnetic field lines generated by the permanent magnet in the housing, it will cause the magnetic flux in the sensing coil to change.

The sensing coil sends the detected magnetic flux periodic change signal to the preamplifier, amplifies and reshapes the signal, generates a pulse signal proportional to the flow rate, and sends it to the unit conversion and flow integration circuit to obtain and display the cumulative flow value. At the same time, the pulse signal is sent to the frequency current conversion circuit, which converts the pulse signal into an analog current quantity, and then indicates the instantaneous flow value.

The round gear transmitter has high machining accuracy and precise installation. The rotation of the gear is scanned non-contact, and each tooth generates a pulse with a very high resolution. Cylindrical gear transmitters can measure very small flow and quantify the small volumes of liquid.

Extended reading: Positive Displacement Flow meter Technology

Helical gear flow meter

PD Flow Meter is referred to as a positive displacement flow meter. Helical Gear-PD Flow Meter is also called, spiral double rotor flowmeter, LLT, LZ double rotor flowmeter, or UF-Ⅱ spiral rotor flowmeter.

As a high-precision flow meter, PD Flow Meter has an accuracy of 0.2 level. It is especially suitable for the measurement of industrial liquids such as crude oil, refined oil, and light hydrocarbons. It is a new generation volumetric flowmeter. Because it uses a pair of spiral rotors with special teeth, it is also called “Helical Gear Flowmeter”.

Extended reading: Flat Pressure Sensor for High Viscosity Fluids

Helical flow meter working principle

The flow meter is mainly composed of a body, a pair of spiral rotors, a magnetic coupling, a reduction mechanism, an adjusting gear, a counter, and a signaling device.

The number of revolutions of the spiral rotor is transmitted to the meter head counter through a reduction mechanism composed of magnetic coupling and a series of gears.

The magnetic coupling is mainly composed of active magnetic steel and driven magnetic steel. The use of magnetic coupling can increase the working pressure and working temperature of the flowmeter, ensure safe operation, and reduce maintenance work.

The measurement chamber mainly has a sealed cavity formed by a pair of special rotors and cover plates as the flow measurement unit.

The rotor is driven by the pressure difference between the inlet and outlet of the flowmeter to rotate, so as to continuously measure the liquid at the inlet to the outlet after being measured in the sealed cavity.

The amount of liquid flowing through each revolution is eight times that of the sealed cavity in the figure. The total number of rotor rotations and the speed of rotation are transmitted to the counting mechanism by the sealed coupling. Then there is pointer display and word wheel accumulation, you can know that it passes through the pipeline Total amount of liquid.

A pulse transmitter can also be installed in the counting mechanism, which becomes a flow meter with a signal.

Matching with the company’s electric display instrument, it can realize remote transmission (quantity, accumulation, instant, and other functions) automatic measurement and control.

Read more about Liquid Flow Meters Guide

Oval gear flow meter

Oval gear flow meter is one of the typical positive displacement flow meters. Measure the flow of liquid filling the pipeline under a certain pressure.

The oval gear flow meter is a pointer display type positive displacement flowmeter. The word wheel accumulates counting and can be equipped with a zero return device. Oval gear flowmeters are widely used in liquid flow control in various industrial fields. Applicable to various types of liquid measurements, such as crude oil, diesel, gasoline, etc. Choose different manufacturing materials, such as crude oil, diesel, gasoline, etc. can be measured.

Extended reading: How to choose a high viscosity flow meter?

Oval gear flow meter working principle

The oval gear flowmeter is composed of a metering box and a pair of elliptical gears installed in the metering box, and the upper and lower cover plates form a sealed crescent-shaped cavity (due to the rotation of the gear, it is not sealed) as the calculation unit of a displacement.

The flow meter is mainly composed of a housing, a counter, an elliptical gear, and a coupling (magnetic coupling and axial coupling), etc. As shown in the figure.

1.Counter 2. Transmitter

3. Accuracy adjuster (used above DN50)

4. Sealed coupling

5. Front cover 6. Cover plate

7. Oval gear 8. Shell

9. Rear cover

When the measured liquid enters the flowmeter through the pipeline, the pressure difference generated at the inlet and outlet pushes a pair of gears to continuously rotate, and the liquid measured by the crescent-shaped cavity is continuously transported to the outlet. The product of four times the secondary displacement is the total amount of the measured liquid flow.

The elliptical gear generates a torque to make it rotate under the action of the pressure difference △p of the measured medium.

The rotor 1 and rotor 2 are alternately driven by one to rotate the other. There are two magnets on each rotor as signal generating elements. There is a magnetic signal detecting element at the center of the two axes at the bottom of the cavity. Whenever the magnet turns to the detecting element, the sensor counts as a pulse.

Each pulse corresponds to a certain amount of medium discharge F, F=XXml/p, so the volume flow Qm per unit time can be obtained: Qm=F*H, F is the amount of medium removed by each pulse; H pulse per unit time number.

Read more about Mass Flow Rate vs Volumetric Flow Rate

Explore Oil and Gas Flow Meters

Mirco flow-high viscosity fluid measurement

High-viscosity liquid means that the liquid is viscous and thick, which is different from general liquids and non-Newtonian fluids (mud, pulp). The activity is slow and it is very difficult to filter by simple methods.

What’s more, in addition to some dust, the liquid also contains colloidal particles that are not completely dissolved.

For example solutions such as rubber, paraffin, cellulose acetate, viscose, polyacrylonitrile, paint and animal glue.

Read more about Liquid Flow Meters Guide

Gear flowmeter is a new type of volumetric flow transmitter, used for precise continuous or discontinuous measurement of the flow or instantaneous flow of liquid in the pipeline. Cylindrical gear flowmeter is especially suitable for heavy oil, polyvinyl alcohol, resin and other viscosities. Flow measurement of high media.

It can measure fluids with a viscosity of up to 10000 Pa.s.
The lowest flow rate can be measured at 0.6L/H. That is 0.0026 GPM. Read more about: what is gpm;

Extended Reading: Insertion Flowmeter Types

Cylindrical gear flow meters are small in size and light in weight.
During operation, the vibration and noise are small and the operation is stable.
It can also be used to measure the small flow rate of small pipe diameters.
The starting flow is small, and the range ratio is wide, suitable for measuring the liquid flow with large fluctuations.
The measurement accuracy is not affected by changes in pressure and flow, with stable performance, long life and large flow capacity.

• Resin and glue measurement
• Measurement of hydraulic oil, lubricating oil and grease
• Fuel oil measurement
• Ink and asphalt measurement
• Liquid nitrogen, freezing liquid, solvent measurement
• Filling measurement of edible oil, fish oil and food
• Chemical and anti-corrosion requirements fluid measurement
• Fluid quantitative control system

Read More about: Chemical Flow Meter Guide

Related Products:

Related Blogs:

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

Sino-Inst, Manufacturer for Gear flow meter for Microflow. For example crude oil flow meter, diesel flow meter, gasoline flow meter.

Sino-Inst’s Gear flow meter for Microflow, 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.

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.

drurylandetheatre.com