The Portable Doppler Flow Meter uses the Doppler effect of sound waves propagating in the fluid. Hand-held design, suitable for handheld wading water flow measurement.

The Portable Doppler Flow Meter (Model: LSX-2) can obtain the velocity of the fluid by measuring the Doppler frequency shift of the sound waves scattered by the moving particles in the fluid. Combined with the built-in pressure water level gauge, the velocity area method can be used to measure the flow of the liquid. It is suitable for flow measurement of open channels, rivers, pipelines and difficult-to-build standard sections. It can work continuously for more than 12 hours on a single charge.

Features of Portable Doppler Flow Meter

• The flow rate range can reach 0.02-5m/s, and the resolution is 1mm/s.
• High response time. It takes a long time to get the flow rate and the measurement results are refreshed in real time.
• Flow measurement by velocity area method, suitable for full and non-full pipes. The water level relationship of the section can be set freely.
• The integrated pressure and water level sensor can directly measure the water depth and can be used in shallow water.
• Fluid mechanics shell design. Little impact on the flow state of the water body. Does not affect the measurement accuracy.
• Small and lightweight handheld terminal with a graphic display interface. It can display the flow rate, flow, water level, and water temperature in real time.
• 16MB internal storage space. It can store more than 100,000 data.
• Equipped with data receiving software. Used for data export and processing.
• Built-in multiple standard flow rate measurement methods and flow calculation methods.
• Rechargeable battery pack, continuous use for more than 12 hours.

Specifications of Portable Doppler Flow Meter

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

Portable Doppler Flow Meter to measure open channel flow

Portable Doppler ultrasonic open channel flowmeter uses the principle of Doppler velocity area method to monitor flow. It is designed for flow velocity and flow measurement in open channels and partially filled pipes.

The principle of the Portable Doppler Flow Meter is to measure the fluid flow rate using the ultrasonic Doppler principle.

The liquid level is measured by pressure and ultrasonic sensors. The calculator can set multiple point coordinates to simulate the shape of the weir trough to obtain the cross-sectional area, so as to measure and monitor the flow.

The principle of ultrasonic Doppler is adopted, that is, any liquid flowing in the pipeline has discontinuous disturbance.

These discontinuous disturbances can be suspended solid particles or bubbles, or interfaces caused by fluid disturbances.

This disturbance causes the reflected ultrasonic wave to produce a Doppler frequency shift Δf. The Doppler shift Δf is a linear function of the flow velocity. By measuring the Doppler frequency shift Δf, and according to the propagation speed of sound waves in the water. The flow velocity of the disturbance can be calculated, and then the water flow velocity can be obtained.

Only need to connect the flowmeter probe and the handheld controller when using the equipment.

Use the measuring rod to fix the flowmeter probe.

Put the flowmeter probe into the channel or water body to be measured.

The hand-held controller can display the corresponding flow rate information.

How much is a 2 inch water flow meter? Let’s find out.

Portable transit time flow meter

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

Sino-Inst, Manufacuturer for Portable Doppler Flow Meters. It can measure a single sound-conducting liquid medium. It can measure even liquids such as water, sea water, oil, and slurry.

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

Request a Quote

KimGuo11

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

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

drurylandetheatre.com

What is a Doppler flow meter? Doppler Flow Meter is a flow meter that uses the doppler effect principle to monitor the liquid flow rate.

Doppler Flow meter use reflected ultrasonic sound to measure the fluid velocity. By measuring the Doppler frequency shift of the sound waves scattered by the moving particles in the fluid, the velocity of the fluid can be obtained. Combined with the built-in pressure water level gauge. Using the velocity area method. The flow of liquid can be measured. Suitable for flow measurement in open channels, rivers, and various full and partial open channels.

Features of Doppler Flow Meter

• All functions in one design. Simultaneous measurement of average flow rate, water depth, and water temperature
• The velocity area method is used to measure the flow, and there is no head loss. There is no need to build a standard weir.
• The ultrasonic Doppler principle is used to measure the flow velocity. The measurement accuracy is high and the initial speed is low.
• No mechanical rotor structure. It has no effect on the water flow state, and the measurement is more accurate.
• Comes with a temperature sensor. It can be used to compensate for the effect of water temperature on the speed of sound.
• It can measure instantaneous flow and cumulative flow.
• Using frequency domain Doppler analysis algorithm. The data is stable and reliable, and the real-time performance is strong.
• Simple installation. No need for auxiliary engineering facilities

Specifications of Doppler Flow Meter

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

Doppler flow meter working principle

For flow velocity measurement, the first thing to explain is the Doppler shift. When there is relative motion between the wave source and the observer, the frequency received by the observer is different from the true frequency of the wave source. The difference between the frequency of the received signal and the frequency of the sound source is called the Doppler shift. Its size is determined by the relative speed between the two. This physical phenomenon is called the Doppler effect.

When measuring the flow velocity, the wave emitted by the probe encounters suspended matter, solid particles, vapor bubbles, and even unstable vortices and disturbances in the medium that follow the wave. Both will produce reflected waves that deviate from the transmit frequency, resulting in Doppler frequency changes. This effect is proportional to the velocity of movement of the reflector.

The receiving probe receives the reflected wave from each point. After complex signal processing, dynamic spectrum analysis and accuracy calculation. The flow velocity of the fluid in the pipe section can be obtained.

Flow rate calculation

The ultrasonic beam emitted from the Doppler velocity sensor (transducer) encounters particles or bubbles moving in the fluid. It is reflected back and received by the Doppler flow sensor (transducer). The Doppler frequency shift of the transmitted signal and the received signal is proportional to the fluid velocity.

Among them:
u is the channel flow rate,
f1 is the working frequency of the sensor,
δfd is the Doppler frequency difference.

Flow calculation

Real-time flow velocity and water level data collected by acoustic Doppler flowmeter.
The data acquisition and processing unit receives the flow rate and water level data. Calculate the instantaneous flow rate and record it as Qs;
Then calculate the accumulated flow rate and record it as Q; its flow rate can be calculated as follows:

Qs=AV

In the formula, A is the water area of the pipeline, and V is the average flow velocity of the section.

Q = QsT

In the formula, the instantaneous flow of Qs section, T is the accumulated time (unit h).

Read more about: Ultrasonic flow meters types & technical guide

Ultrasonic doppler flow meter advantages and disadvantages

Ultrasonic doppler flow meter advantages and disadvantages

Advantages of ultrasonic Doppler flowmeter:

1. Contact measurement. Can accurately measure the flow rate of the fluid;
2. Wide range of use. It can measure the flow velocity of rivers, channels, dissatisfied pipelines, and urban underground pipe network sewer scenarios;
3. Simple installation. No baffle or weir groove is needed. The data can be measured by simply contacting the sensor directly with the fluid;
4. Low power consumption, diversified power supply methods, 6v power supply. Optional external power supply, battery power supply, solar power supply;

Disadvantages of ultrasonic Doppler flowmeter:

1. Cannot measure pressured pipelines, closed pipelines and high temperature environments;
2. The water depth is less than 10cm and cannot be measured;
3. The stable data can only be measured in a place where the water flow is stable, and there are certain requirements for the selection of the installation location;
4. For a site with a large turbidity, it is not as good as a site with more floating objects, garbage, and bottom silt, and accurate data cannot be measured;

Ultrasonic Doppler Flow Meter Applications

Ultrasonic Doppler Flow Meter Applications

Fixed Doppler ultrasonic flowmeters

Mainly used in environmental testing of urban sewage treatment plants, drainage pumping stations, and mining, oilfields, metallurgy, chemical, oil refining, paper, food and other industries.

Flow measurement of urban drainage, industrial wastewater, domestic sewage, mud, paper pulp, oil-water mixture, etc.

It is suitable for hard pipes such as steel and hard plastic pipes.

It can measure two-phase liquids containing suspended solid particles or bubbles in tubes with various tube diameters and wall thicknesses.

Doppler flow meter open channel

Doppler flow meter open channel

There are many monitoring methods for measuring the flow of water in open channels, among which the water level flow method and the velocity area method are the majority. The former uses an ultrasonic open channel flowmeter to measure, and the latter uses a Doppler flowmeter to measure in an open channel.

The methods used for different open channels are different. Here we mainly talk about what conditions the Doppler flowmeter must meet for measurement in an open channel.

The Doppler flowmeter is in full contact with the water through the flow rate sensor. The real-time flow rate is measured. Input the width, shape, and water depth of the open channel to the host. The host uses the speed area method to convert the real-time flow.

Therefore, it requires the water depth to immerse the sensor in order to obtain more accurate data.

Due to the principle of ultrasonic measurement, it is determined that the Doppler flowmeter measurement in the open channel needs to meet the following conditions:

1. The flow rate of the water flow should be uniform, and there should be no plain flow (to ensure such measurement conditions, the site should meet the straight channel with 15 times the channel width)
2. Water depth requirement: no sensor (Yuzheng Doppler flowmeter requires water depth ≥13cm)
3. Width of open channel ≥50cm
4. The water flow velocity is required to be 0.04m/s-10.00m/s. If the flow velocity is too fast, the measurement will be inaccurate
5. There should be no rubbish and large floating objects in the open channel
6. The water in the open channel should not be too pure, for example, pure water cannot be measured

The above six points are the conditions that need to be met simultaneously for the measurement in the open channel of the Doppler flowmeter. Of course, before the measurement, the selection of installation and the selection of the installation point are also very important.

If you still don’t understand the details, you can contact Sino-inst technical consultant to get in touch to solve your troubles in detail.

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

Application of Ultrasonic Doppler Flowmeter in Irrigation District

Application of Ultrasonic Doppler Flowmeter in Irrigation District

1.Check the water level and velocity curve

Portable Doppler ultrasound can be used to place it in the channel of the irrigation area. During the upstream discharge process, the water level, velocity, and flow changes are measured. The water level, velocity, and flow meter are generated.

In the later calculation, you can directly use the ultrasonic water level gauge or the radar water level gauge for online monitoring. Combine the existing water level, velocity and flow relationship to get the flow value under the current water level.

When the upstream and downstream channels of the irrigation area are changed, re-measurement is required. This method is suitable for use in irrigation areas that require cost and require mass monitoring.

2.Long-term online monitoring

Use LSX-1 Doppler ultrasonic flowmeter with telemetering terminal. Use city power or solar power system for power supply. Fix the flowmeter in the channel. The telemetry terminal periodically collects the data in the flowmeter and sends it to the server remotely via GPRS. The data can be viewed through the WEB platform.

Portable Doppler Flow Meter

The Portable Doppler Flow Meter uses the Doppler effect of sound waves propagating in the fluid. Hand-held design, suitable for handheld wading water flow measurement.

The Portable Doppler Flow Meter (Model: LSX-2) can obtain the velocity of the fluid by measuring the Doppler frequency shift of the sound waves scattered by the moving particles in the fluid. Combined with the built-in pressure water level gauge, the velocity area method can be used to measure the flow of the liquid. It is suitable for flow measurement of open channels, rivers, pipelines and difficult-to-build standard sections. It can work continuously for more than 12 hours on a single charge.

Transit time vs Doppler flow meter

There are two types of ultrasonic flowmeters, one is the time difference measurement method, and the other is the Doppler method. Many users often only know one of them.

Here, we make a simple comparison so that you can choose the correct model.

1.The measurement principle is different.

The main principle of the time difference method is that when the ultrasonic beam propagates in the liquid, the flow of the liquid will cause a small change in the propagation time. The change in its propagation time is proportional to the flow rate of the liquid.

At zero flow, the time required for the two sensors to transmit and receive sound waves is exactly the same. The only technology that can actually measure zero flow.

When the liquid is flowing, the transmission time of sound waves in the counter-current direction is longer than that in the downstream direction. The Doppler method uses the characteristic that the ultrasonic wave will be scattered when encountering tiny solid particles or bubbles in the propagation path.

2.The applicable medium is different.

The time difference ultrasonic flowmeter can only measure clean liquids. It will not work well when it contains more solid particles or bubbles.

The Doppler method uses the scattering characteristics of ultrasonic waves for measurement. Therefore, the Doppler method is suitable for measuring fluids containing solid particles or bubbles, but clean liquids cannot be measured.

3.The measurement accuracy is different.

The time difference method has higher measurement accuracy, and the Doppler method has lower measurement accuracy.

Since scattered particles or bubbles exist randomly, the sound transmission performance of the fluid is also different. If it is a fluid with poor sound transmission performance, the scattering is stronger in the low velocity area near the pipe wall.

However, the scattering of fluids with good sound transmission performance is dominant in the high velocity area, which makes the measurement accuracy of the Doppler method lower.

Although it adopts a structure in which the transmitting transducer and the receiving transducer are separated. In this way, only the scattering in the middle area of ​​the velocity profile can be received. However, the measurement accuracy is still lower compared with the time difference method.

4.The working conditions are different.

The time difference method is suitable for full pipe measurement.
The Doppler method is suitable for measuring the flow of full pipes, partial pipes, open channels, etc.

OMEGA Engineering has a good explanation of Doppler vs Transit Time. Let’s look together.

Video source: https://www.youtube.com/watch?v=NQWNYARWmB8

More Featured Ultrasonic Flowmeters

Sino-Inst, Manufacuturer for Ultrasonic Doppler Flow Meters. It can measure a single sound-conducting liquid medium. It can measure even liquids such as water, sea water, oil, and slurry.

Sino-Inst’s Ultrasonic Doppler Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, 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

Ultrasonic open channel flow meter can measure the water level, flow rate, and total volume flowing through weirs, troughs, channels, and partially filled pipes. Ultrasonic open channel flow meter is used in conjunction with Parshall flume. Using hydraulic flow measurement, ultrasonic positioning, microcomputer processing, digital display, and other technologies. It can be installed and automatically measured in harsh environments. Commonly used for agricultural irrigation water discharge measurement, wastewater, sewage, and other measurements.

Parshall Flume (PVC material, stainless steel material) for Open Channel Flow Meter

When choosing the type of weir and trough for measuring water, it is necessary to consider the size of the flow in the channel, the flow pattern of the water in the channel, and whether it can form a free flow. According to the different large flow, we can choose different weir grooves.

• The large flow rate is less than 40 liters/sec. It is recommended to use a right-angled triangular weir;
• It is recommended to use Parshall tank for more than 40 liters/sec;
• The upstream channel is short, and the large flow rate is greater than 40 liters/sec. It is recommended to use a rectangular weir.

Conditions permit, a good choice of Parshall slot. The water level-flow relationship of the Parshall trough is calibrated by the laboratory, and the requirements for the upstream flow into the trough are relatively weak. The water level-flow relationship of the triangular weir and the rectangular weir is derived from theoretical calculations, and it is easy to cause additional errors due to ignoring some use conditions.

Use glass fiber reinforced plastic to make the measuring weir or trough. The size of the mouth of the triangular weir and the rectangular weir should be accurate, and the surface facing the water inlet should be smooth; the size of the throat part of the Parshall groove should be accurate, and the inner surface of the groove should be smooth.

Common installation methods and installation precautions of Parshall groove:

• Put the Parshall trough into the open channel. Keep the trough level. The centerline of the Parshall trough should coincide with the centerline of the channel, so that the water flow into the Parshall trough does not appear drift.
• After the Parshall trough is filled with water, the flow state of the water should flow freely. The submergence degree of the Parshall trough is less than the specified critical submergence degree.

Require:
Keep the downstream discharge of the Parshall trough unblocked. Do not accumulate water, if not unblocked. Keep the water level difference greater than or equal to 30MM.

The straight section before the Parshall trough has a distance buffer of 1 to 3 meters. The buffer channel should be level with the bottom of the trough. It is convenient for ultrasonic measurement.

It must be ensured that there is a water level difference downstream of the Parshall trough. The discharge is unobstructed and no water will accumulate.

Extended reading: Dam water level measurement

Open Channel Ultrasonic Flow Meter Working Principle

The open channel flowmeter is based on the specific shape of the Parshall metering groove/weir plate metering groove. It guarantees a certain liquid level and knows a certain flow rate. The Parshall groove/weir plate metering groove is selected as the specific flow channel. The measurement accuracy is high. Easy to install.

The sensor measures the height of the liquid level, which is processed by 89C52 series single-chip microcomputers to obtain the instantaneous flow and cumulative flow values.

The flow can be expressed by the following formula:
　　Q=KHn
　　Q: Instantaneous flow rate (t/h) K: Flow rate constant
　　H: height of liquid level n: nth power value

The instantaneous flow is processed by the cumulative accumulation to obtain the cumulative flow.

Extended reading: Radar Non Contact Water Level Sensor

Inline Ultrasonic Flow Meter

Transit Time Ultrasonic Flow Meter Working Principle

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 the upstream sensor to downstream
ΔT = T up – T down

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

Ultrasonic Doppler Flow Meter Working Principle

Ultrasonic Doppler Flow Meter uses the physical principle of Doppler frequency shift to measure the water flow velocity.

Doppler effect (Doppler frequency shift) principle:
The sound waves emitted by one object are received and reflected by another object. If the object emitting the sound wave is moving relative to the receiving object. The frequency of the sound wave received by the receiving object will be different from the frequency of the emitted sound wave.

If the relative distance between two objects is reduced, the received frequency will increase.
If the relative distance between two objects is increased, the received frequency will decrease.

Such Doppler effects often occur in daily life. For example: when you hear the sirens (sounds) of an oncoming police car. The sound will appear higher in frequency. When the police car is far away from you, the sound it hears will become lower.

Through the difference between the frequency of transmitting ultrasonic waves and the frequency of receiving ultrasonic waves, the specific flow rate can be calculated. Then the water level is measured by the pressure sensor, and the water passing area is calculated from the water level and channel size.
Finally, the velocity and area are integrated to calculate the final instantaneous flow.

Calculation formula:
Velocity × water area × 3600 seconds = instantaneous flow rate (cubic meters/hour)

Read mroe about: Irrigation Flow Meters for Agriculture Water System

Ultrasonic Open Channel Flow Meter Measures Sewage

Because the ultrasonic open channel flow meter uses open channel non-contact measurement. Therefore, the probe can be separated from the host. It can effectively solve the problems of probe corrosion and instrument accuracy, so it is widely used in irrigation and drainage and sewage measurement.

Read more about: Common River Water Level Measurement Methods

Note when installing:

• To ensure that the sewage flowing through the flow tank has no foreign matter. A filter must be installed not far upstream of the flow tank;
• To ensure that the sewage flowing through the flow tank is stable and without ripples. A still water well connected to the flow trough can be arranged on the side of the flow trough. The inner diameter of the well is ≥100mm. The bottom of the well should be 150mm below the lowest point of the trough. The width of the straight section of the trough ≥ 10 times the width of the water surface of the weir. The highest water level downstream is lower than the lowest water level of the weir;
• The emission surface of the sensor probe should be parallel to the liquid surface. The distance between the lower end of the sensor and the highest liquid level should be ≥0.7 m;
• There should be no strong light, electromagnetic field and other radiation sources around the sensor;
• There should be measures to prevent rain and snow above the ultrasonic sensor.

Note in use:

• Because the places where sewage ultrasonic sensors are installed are places with relatively poor environment. Therefore, the host of the instrument should be installed indoors. There should be a dedicated person to take care of it. Conduct regular inspections of lines and sensors;
• The meter should be checked regularly.

Read more about: Waste water measurement

More Featured Ultrasonic Flow Meter

Sino-Inst, Manufacturer for Open Channel Flow Meters. It can measure a single sound-conducting liquid medium. It can measure even liquids such as water, seawater, oil, and slurry.

Sino-Inst’s Open Channel 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.

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

Transit Time Ultrasonic Flow Meter is a multi-channel flow meter. A velocity flow meter that measures the flow rate of the medium using the time difference method.

Transit Time Ultrasonic Flow Meter is the flow velocity obtained by measuring the difference in the propagation time of the ultrasonic pulse in the measured medium. When multiple beams of ultrasonic waves propagate in a flowing fluid, they carry information about the fluid velocity. The flow rate of the fluid can be detected by the received ultrasonic wave and converted into flow rate. The use of ultrasonic flowmeter eliminates the need to install measuring elements in the fluid. No additional resistance is generated.

Features of Multipath Transit Time Ultrasonic Flow Meter

• High measurement accuracy:
  • The multi-channel ultrasonic flowmeter calculates the surface average velocity and flow rate by double integration of the velocity distribution and area distribution. It is not affected by the Reynolds number during the measurement, so high accuracy and high repeatability can be obtained.
• Two-way measurement: It can measure the forward and reverse flow of the measured fluid.
• Large measuring range: The measuring range of flow velocity can reach 0.03m/s～20m/s.
• Wide application range:
  • The nominal diameter of the measuring pipe can reach DN25mm～15000mm.
  • The measuring width of the open channel can reach 30 m.
  • The measuring width of the river can reach 150m.
• Good low flow rate:
  • The multi-channel ultrasonic flowmeter can obtain high accuracy in a more complicated state with low flow rate. The problem of inaccurate measurement in the low flow rate area is solved.
• Dry-type verification technology:
  • It can realize online verification, which solves the problem that large-diameter flow meters and flow meters in use cannot be verified in real flow. It also reduces the cost of verification.
• Continuous flow online installation and maintenance:
  • It can be installed and maintained online to avoid the loss caused by the current cut. No need to set up bypass pipelines, reducing construction and maintenance costs.
• Low pressure loss: no drive, protruding and other obstructive parts, no pressure loss.
• Short upstream and downstream straight pipe sections required: accuracy can be guaranteed when the upstream 5D and downstream 2D ​​(D is the pipe diameter) are met.
• Can display and transmit pressure signal:
  • Install a pressure sensor to measure fluid pressure, which can be displayed on the secondary meter and realize communication.
• With RTU function:
  • Can store positive and negative instantaneous flow, cumulative flow, flow rate, pressure, power failure records and other information.
  • You can download and store data on-site. It can also be remotely transmitted to the upper computer for control and management.

Extended Reading: Inline Ultrasonic Flow Meter

Specifications of Multipath Transit Time Ultrasonic Flow Meter

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

Transit Time Ultrasonic Flow Meter Principle

The time difference method is actually based on the vector superposition of the ultrasonic propagation velocity and the liquid velocity. It can be simply compared to the process of ferrying on a river.
Although the speed of the ferry itself is the same when flowing downstream and upstream.

However, due to the influence of the current speed, the time required for the ferry to reach the opposite bank is less when the flow is downstream than when it is upstream. The greater the flow velocity, the faster the downstream speed, and the longer the time required for the upstream flow. The time difference between the forward and reverse flow is proportional to the flow velocity.

Transit time ultrasonic flow meter equation

The difference in the upstream and downstream measurements taken over the same path is used to calculate the flow through the pipe:

V = K • D/sin2θ • 1/(T₀ – t)² ΔT

Where:

V = Mean velocity of flowing fluid
K = Constant
D = Inner diameter of the pipe
θ = Incident angle of ultrasonic waves
T₀ = Zero flow transit time

ΔT = T₁ – T₂
T₁ = Transit time of waves from upstream transmitter to downstream receiver
T₂ = Transit time of waves from downstream transmitter to upstream transmitter
t = Transit time of waves through pipe wall and lining

The above equation shows that the flow velocity of the fluid is directly proportional to the difference in the upstream and downstream measurements.

The transit time ultrasonic flow meter has three possible transducer configurations: Z, V and W.

All are recognized as a single measuring path, whereas the ultrasonic beam follows a single path. In all three configurations, the output produced by the transducers is converted to a current, frequency or voltage signal. The preferred configuration is determined by factors such as:

• Pipe size
• Space available for mounting the transducers
• Condition of the internal walls of the pipe
• Type of lining
• The characteristics of the flowing liquid

In the “Z” configuration, the transducers are positioned on opposite sides of the pipe with one downstream from the other.

Usually, the distance downstream is approximately D/2, where D equals the diameter of the pipe. The optimum distance is calculated by a converter. This arrangement is only advisable under conditions where there is limited space, high turbidity, a mortar lining or a thick build-up of scale on the interior walls of the pipe. It should be avoided for installations on small pipes, where the accuracy of its measurements tends to degrade.

The “V” configuration is recommended for most installations. This arrangement places the two transducers on the same side of the pipe within approximately a diameter of the pipe from each other. A rail attachment clamps on the pipe and allows the transducers to be slid horizontally to position them the calculated distance apart.

A “W” configuration is most often used for installations on pipes with diameters of ½ inch to 1½ inches. In this arrangement, the ultrasonic signal rebounds from the wall three times; therefore, it must travel a greater distance. High turbidity liquids, and scale or deposit build-up on the interior of the pipe wall can diminish accuracy.

Extended reading: Ultrasonic flow detectors types

More Transit Time Ultrasonic Flow Meter

Sino-Inst, Manufacturer for Transit Time Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium. It can measure even liquids such as water, seawater, oil, and slurry.

Sino-Inst’s Transit Time Ultrasonic 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.

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

Digital Ultrasonic water meter works with principle of ultrasonic time difference is used to measure the flow of liquid in the pipe.

Can be battery powered and wireless. For residential water, urban water, industrial water management.

Request a Quote

• High accuracy and reliable operation.
• Low starting flow rate(Q1)
• IP68 protection
• Built-in Lithium battery for 6 years life expectancy.
• No Rotation, N o Moving Parts
• Can completely replace other types of water meters.

• Specifications
• Transducer
• Flow Range
• Features
• How it works

Specifications of Ultrasonic Water Meter

Item	Specification
Measurement Liquid	Water, Sewage, Seawater( Other liquid need to customized), the liquid should be full of the pipeline
Medium Temperature	0.1-30℃
Working Environment	Temperature：-10~45℃； Humidity≤100%（RH）
Working Pressure	1.6MPa(2.5MPa optional)
The sensitivity of upstream	U3
The sensitivity of downstream	D0
Climatic and mechanical	C class
Electromagnetic compatibility class	E2 class
Communication Interface	RS485/USART/Infrared
Output Signal	Two way OCT pulse output/TTL pulse output/One way4-20mA output
Power Supply	Built-in Lithium battery(3.6,19AhV)/DC8-36V power supply
Protection Class	IP68, can work 2 meters underwater
Digital Display	Multi-line 9 digital accumulative flow,4 digital display for instantaneous flow, varies of state prompt and units
Data Storage	EEPROM/FLASH, automatically record the accumulative flow of the last 512 days
Measurement Cycle	Measuring:1 times/second;Verification:4 times/second
Power Consumption	＜2.7AH/Year,6 years battery life

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

Dual Channel Ultrasonic Water Meter Optional Transducer:

	DN15~DN40	Single channel, the copper material, forging technology
	DN50~DN150	Dual channel, nodular cast iron (304 stainless steel optional), integrated casting technology
	DN200~DN300	Dual channel

Dual Channel Ultrasonic Water Mete Flow range:

Norminal Diameter （mm）	Range than R	Flow（m³/h）
		Starting Flowrate	Minimum Flowrate Q1	Transitional Flowrate Q2	Permanent Flowrate Q3	Overload Flowrate Q4
DN15	200	0.003	0.0125	0.020	2.500	3.125
DN20	200	0.0035	0.016	0.026	3.200	4.000
DN25	200	0.007	0.020	0.032	4.000	5.000
DN32	200	0.010	0.032	0.050	6.300	7.875
DN40	200	0.015	0.100	0.160	20.000	25.000
DN50	100	0.030	0.400	0.640	40.000	50.000
DN65	100	0.059	0.630	1.008	63.000	78.750
DN80	100	0.064	1.000	1.600	100.000	125.000
DN100	100	0.094	1.600	2.560	160.000	200.000
DN125	100	0.120	2.000	3.200	200.000	250.000
DN150	100	0.270	2.500	4.000	250.000	312.500
DN200	100	0.315	4.000	6.400	400.000	500.000
DN250	100	0.508	4.000	6.400	400.000	500.000
DN300	100	0.770	6.300	10.080	630.000	787.500

Features of Ultrasonic Water Meter

• Initiating flow lower to millimeter grade 
• Multi line 9 digital LCD dispaly accumulative flow and 4 digital for instantaneous flow
• High reliability design, no moving part 
• Two channel isolated pulse output,pulse equivalent and output pulse can be arbitrary customed
• Two-wired system 4-20mA output optional 
• Built-in Lithium battery for 6 years life expectancy
• It can automatic power saving under empty pipe or the liquid static for a long time
• Resin vacuum sealed IP68 for long life and high expectancy Chronological cumulative record 
• Standard RS485 interfaceInfrared communication interface,support CJ-188 communication Support MODBUS, M-BUS communication protocol 
• TTL levels pulse output and USART interface,convenient to connect the low power consumption equipment 
• With the two channel PT1000 temperature transducer, which can realize the heat measurement

Ultrasonic Water Meter Working Principle

First of all, let’s start with the measurement principle of the ultrasonic water meter:

Ultrasonic water meters use the difference between the downstream and upstream propagation of sound waves in the water to obtain the flow velocity of the water through a measurement formula, thereby further obtaining the cumulative flow of water per unit time.

Then the component that emits sound waves and receives the return sound waves is called a transducer. An ultrasonic water meter with a pair of transducers is called a mono ultrasonic water meter.

In theory, the measurement accuracy of an ultrasonic water meter with more channels will be higher. Because the more sound channels, the wider the width of the water meter to measure the water flowing through the pipe section. The more the number of measurements, the more reliable the data obtained.

However, the subsequent change is also the substantial increase in cost. If it is not particularly necessary, it is recommended to use dual channels to meet the normal measurement requirements.

Generally speaking, two-channel ultrasonic water meters are only used for DN100 and above.

More about:

Ultrasonic flow meters types & technical guide

What is ultrasonic water meter

Ultrasonic water meter is a new type of water meter that detects the time difference caused by the speed change when the ultrasonic sound beam propagates in the water upstream and downstream, and analyzes and processes the water velocity to further accumulate the water flow.

Ultrasonic water meter is a fully electronic water meter manufactured with industrial-grade electronic components using the principle of ultrasonic time difference. Compared with mechanical water meters, it has high precision, good reliability, wide range ratio, long service life and no moving parts. No need to set parameters, installation at any angle, etc.

With excellent small flow detection capabilities, it can solve many problems of traditional water meters. More suitable for gradient charging of water charges. It is more suitable for the conservation and rational use of water resources. It has a broad market and application prospects.

Extended reading: Portable ultrasonic flow meter for water

Ultrasonic water meter accuracy

There are two types of ultrasonic water meter accuracy: Class 1 and Class 2.

Ultrasonic water meters supplied by Sino-Inst are generally Class 1 with an error of 1%.

Read more about: Ultrasonic flow meters types & technical guide

Ultrasonic water meter clamp-on

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

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

Clamp on Flow Meter Reference price: USD 470.00/pc

Sino-Inst offers a variety of  Ultrasonic flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Extended Reading: Chilled Water Flow Meter

What are the different types of ultrasonic flow meter?

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.

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.

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: Portable ultrasonic flow meter for water

Magnetic water meter-ultrasonic water meter-mechanical water meter

9 points: the difference between electromagnetic water meter-ultrasonic water meter-mechanical water meter

The following are some of the differences between these three tables summarized by Sino-Inst:

1. Water quality requirements

Electromagnetic water meter: not affected by impurities such as sand, weeds, and chemical substances in the medium, but interfered by magnetic substances;
Ultrasonic water meter: It is not interfered by impurities, chemical substances and magnetic substances in the medium such as sand, weeds, etc.;
Mechanical water meter: The water quality similar to tap water must be used, and the liquid must not contain impurities such as rust, gravel, aquatic plants, etc.

2. Turndown ratio

Electromagnetic water meter: low flow rate measurement performance is poor, medium and high flow rate measurement performance is stable. The coverage of the turndown ratio does not cover the small flow area;
Ultrasonic water meter: The range is generally better than 100:1, the initial flow velocity is extremely low, which can be lower than 0.01m/s, and the effective measurement range is large, which can avoid running, emitting, dripping, and leaking;
Mechanical water meter: It is more difficult to make high range ratio products, and the range ratio of conventional water meters is generally below 80

3. Protection level

Electromagnetic water meter: electronic products, the protection level strictly meets IP68 requirements, and the quality must be qualified.
Ultrasonic water meter: electronic products, the protection level strictly meets IP68 requirements, and must be qualified by products;

Mechanical water meter: IP68

4. Pressure loss

Electromagnetic water meter: meet the minimum level of pressure loss ΔP10;
Ultrasonic water meter: meet the minimum level of pressure loss ΔP10
Mechanical water meter: The force loss is very large, about ΔP63

5. Wearability

Electromagnetic water meter: no mechanical moving parts, never wear, accuracy has little relationship with the use time, the general verification period is more than 3 years;
Ultrasonic water meter: without any mechanical moving parts, never wear, accuracy has little relationship with the use time, the general verification period is more than 3 years;
Mechanical water meter: Use impeller gears and other mechanical rotating parts to measure, and there is abrasion. The longer the use time, the lower the measurement accuracy.

6. Installation method

Electromagnetic water meter: horizontal or vertical, the electrodes must be on the same horizontal plane;
Ultrasonic water meter: freely choose the installation method according to the site conditions, horizontal, vertical, or inclined installation;
Mechanical water meter: Single installation, must be installed strictly horizontally or vertically.

7. Installation requirements (sensitivity level of flow field)

Electromagnetic water meter: U10D5 or U5D3: Upstream requires 10/5 times the pipe section aperture length, and downstream requires 5/3 times the pipe section aperture length;
Ultrasonic water meter: the industry-leading product can be better than U3D0: the upstream requires 3 times the length of the pipe section aperture, and the downstream can be directly connected to the elbow;
Mechanical water meter: U10D5: Upstream requires 10 times the length of the pipe section aperture, and downstream requires 5 times the pipe section aperture length.

8. Communication network

Electromagnetic water meter: internal circuit initiated, no external electronic device is needed, zero communication error;
Ultrasonic water meter: the internal circuit is initiated, no external electronic device is required, and the communication is zero error;
Mechanical water meter: additional electronic devices are required.

9. Power supply problem

Electromagnetic water meter: The principle of electromagnetic induction determines that the power consumption is relatively large. Generally, it takes 15s to measure the flow rate once, and the battery life is 3-5 years;
Ultrasonic water meter: Qualified product, can guarantee the battery life of more than 10 years under the current measurement cycle of at least 1S;
Mechanical water meter: The mechanical base meter does not require power supply.

Read more about: How does a residential water meter work?

water meter installation details

Installation and use of ultrasonic water meters and precautions:

1. The applicable model is determined according to the system flow rather than the system pipe diameter. The diameter and model of the heat meter should be determined according to the commonly used flow.
2. According to the design requirements of household measurement, a filter must be installed before the water inlet. The filter must be cleaned and maintained regularly.
3. It must be installed in a horizontal or vertical direction, and the direction of the arrow on the pulse meter (including the filter) must be consistent with the direction of the water flow in the pipeline. Do not allow the water to flow backwards to avoid impurities in the water from damaging the meter. When installed vertically, the water flow direction must be upward .
4. Before installation, the pipes must be cleaned.
5. There should be straight pipes of sufficient length at the inlet and outlet of the water meter. The length of the straight pipe at the front end of the inlet should not be less than 10 times the length of the pipe diameter. The length of the straight pipe at the front end of the outlet should not be less than 5 times the length of the pipe diameter:
6. The water meter calculator (display) shall not be immersed in water.
7. The water quality of the water supply should meet the relevant regulations.
8. The water meter is a measuring instrument, and the heat meter must be checked regularly in accordance with national standards, and the battery must be replaced during the check.
9. To avoid man-made damage to the metering system, a water meter box can be installed.
10. Without the permission of the company, no one is allowed to disassemble the maintenance watch without permission, otherwise the warranty service will be released by itself.

Read more about: Common River Water Level Measurement Methods

water meter life expectancy

Water meter is an instrument for measuring water flow. Most of them are cumulative flow measurement of water, generally divided into two types: volumetric water meter and speed water meter. Originated in the United Kingdom, the development of water meters has a history of nearly two hundred years.

The service life of the water meter shall not exceed 6 years (caliber of 15-25 mm), 4 years (caliber of > 25-50 mm), and shall be rotated upon expiration. In other words, a water meter with a diameter of 15 to 20 mm can be used for up to 6 years.

More high accuracy liquid flow meters

More Water Flow Measurement Solutions

Frequently
Asked
Questions

Help Center

How does an ultrasonic water meter work?

Ultrasonic water meters mainly use:

When the ultrasonic wave is transmitted in the water flow, the speed and temperature of the water flow will affect the ultrasonic receiving time. However, the difference between the upstream and downstream measurement times can eliminate the temperature effect. Therefore, if the ultrasonic receiving time is affected at this time, it is only related to the speed of the water flow.

During measurement, both transceivers transmit and receive ultrasonic waves, and the current water velocity can be calculated according to the time difference between upstream and downstream.

Compared with mechanical water meters, it has the characteristics of high precision, good reliability, wide range ratio, long service life, no moving parts, no need to set parameters and installation at any angle.

If the diameter of the water pipe is known when calculating the water loss, the flow rate for a certain period of time can be calculated. The calculation formula is:

Downstream formula: TDown= L / (VS+ Vf)
Upstream formula: TUp= L / (VS– Vf)

L is the distance between the two ultrasonic sensors. VS is the speed of sound in water. Vf is the velocity of the water flow.

It is precisely because the ultrasonic water meter has the above characteristics. The measurement accuracy of the ultrasonic water meter is very high. It is several times or even dozens of times that of ordinary mechanical water meters. It is precisely because of this that more and more people are beginning to use ultrasonic water meters.

Check more Choosing The Right 1 Inch Flow Meter.

What is ultrasonic meter used for?

The areas with relatively large demand for ultrasonic water meters include agricultural irrigation, township water supply, urban water supply, and smart city construction.

Details as follows:

1. Agricultural irrigation: no mechanical transmission parts. No flow blocking elements. Ultrasonic water meter measurement is almost unaffected by water quality. It can adapt to the poor water quality of agricultural irrigation and is the most suitable product for the measurement of agricultural irrigation water.​​
2. Smart city: no pressure loss, reduce the energy consumption of the pump, and achieve the goal of energy saving. The communication interface is complete. It is convenient for network remote monitoring and reflects intelligence. Battery powered, no mechanical transmission parts, long service life.​​
3. Urban water supply: The initial flow of the ultrasonic water meter is low, which avoids the unmeasured small flow and increases the water fee income. The high measurement accuracy makes the accurate measurement of water bills a reliable guarantee. Wide range ratio, suitable for various users with different water consumption.​​
4. Township water supply: adapt to various domestic water quality conditions. The communication network is convenient, the output signal is many, and it is convenient for automatic settlement and computer management. Realize centralized management of water resources and improve management efficiency. Remote monitoring, reducing management costs.

Read more: Insertion Type Ultrasonic Flow Meter Applications

How accurate are ultrasonic water meters?

What are the advantages of ultrasonic flow meter?

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

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

Sino-Inst is Manufacturer of ultrasonic water meters. We supply more than 20 kinds of ultrasonic water meters. 90% of ultrasonic water meters are used in industrial agriculture. The rest are for civilian use.

Due to the measurement of different pipes, the price of ultrasonic water meters is also different. Available from USD 50.00 to USD 1500. So, if you need to purchase ultrasonic water meter. Please contact our sales engineer to confirm the price.

Ultrasonic water meters are mainly used for flow measurement of water. They are mainly used for metering and monitoring the flow of water media, such as domestic water, central air conditioning system water, equipment pipe network water, etc.

Ultrasonic water meters enable stable flow measurement . This greatly meets the measurement needs of many applications. Can be used from small to large tubes.

Sino-Inst’s Ultrasonic water 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.

The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Ultrasonic water meters, level sensor, or other device, give us a call.

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

Ultrasonic Water Flow Meter is a new type of water meter designed for water resource monitoring. Using ultrasonic time difference measurement technology.

Insertion Ultrasonic Water Flow Meter (Model: 2000K) is a card type digital water meter. Using ultrasonic time difference measurement technology. A new type of water meter designed for agricultural irrigation, garden management, and water pipe monitoring of water resources. The thickness of the water meter is only 50mm to save installation space.

Ultrasonic Water Flow Meter Reference price: USD 270.00/pc

Features of Insertion Ultrasonic Water Flow Meter

• Small and compact all plastic, IP68 protection level
• High accuracy 100:1 turndown ratio
• Pipe body probe, not easy to scale
• Adaptive ultrasonic signal can measure water with impurities
• Single chip SOC digital time difference processing
• Multi-line with status display, touch key operation
• Optional built-in Lora or NB-iot function
• Dual interface RS485 and MBUS
• MODBUS, MBUS, CJ188 and other multiple communication protocols
• Can work with external power supply
• 10 years working life of built-in battery
• Reliable and low price suitable for mass application

How much is a 2 inch water flow meter? Let’s find out.

Specifications of Insertion Ultrasonic Water Flow Meter

Extended reading: What is Modbus Protocol?

Flow Rate:

Extended Reading: Inline Ultrasonic Flow Meter

Extended reading: Industrial VS Residential inline water flow meters

Ultrasonic Water Meter Working Principle

The ultrasonic water meter adopts the time difference method to measure the flow. That is to say, an ultrasonic transducer is installed in the upstream and downstream of the measurement channel (pipe section) for mutual transmission and reception of ultrasonic signals.

Because the ultrasonic signal is superimposed with the water flow signal. Make the sound waves travel at different speeds in the forward and reverse flow. Therefore, the ultrasonic signals emitted by different transducers have different running times in water. By measuring the difference in time, the flow rate of the fluid can be calculated. And then converted into flow, so as to achieve flow measurement.

There are two transducers on top of the flow tube. Transducer A transmits an ultrasonic signal (downstream) to transducer B. At the same time, the B transducer transmits an ultrasonic signal (countercurrent) to the A transducer. A certain time difference is formed in the transmission process of the ultrasonic signals in the upstream and downstream.

In the case of calibrated pipe diameter cross-sectional area and standard measuring pipe length. The flow rate of the meter is calculated by the calculation chip on the integrator.

Featured ultrasonic clamp-on water flow meter

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

Clamp on Ultrasonic Flow Meter ( Model: 3000S) is composed of a host and an external clamp sensor. The flow measurement of various liquids can be completed by simply sticking the external clamp sensor on the surface of the pipeline. Compared with the traditional flowmeter, it does not need to cut off the pipe and flow, the installation is convenient and quick, and it truly realizes the lossless installation. Compared with the common TDC algorithm of other manufacturers, TGA measurement technology is an algorithm for measuring process time with higher speed and higher accuracy.

Read more about: Digital Water Flow Meters

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Sino-Inst, Manufacuturer for Insertion Ultrasonic Water Flow Meters. It can measure a single sound-conducting liquid medium of DN 25—150mm. It can measure even liquids such as water, sea water, oil, and slurry.

Sino-Inst’s Insertion Ultrasonic Water Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, 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

Inline Ultrasonic Flow Meter is a standard pipe section flow meter. The flow rate is measured by the principle of ultrasonic time difference.

The InLine Ultrasonic Flow Meter ( Model:2000F) uses pipe-segment sensors to measure liquid pipes. It solves the problem of measurement accuracy drop caused by non-standard pipes and human installation errors in the process of clamp-on and Insertion type. The measurement accuracy of one percent is truly achieved.

Inline Ultrasonic Flow Meter Reference price: USD 470.00/pc

• Features
• Specifications
• Optional Hosts

Features of InLine Ultrasonic Flow Meter

• High accuracy
  • Better than ±1%
• Wide measuring range
  • Several types transducer for selection, pipe size from Dn15mm to Dn6000mm
• High Reliability
  • Adopt low voltage, multi-pulse technology to improve accuracy, useful life and reliability.
• Strong Anti-interference
  • Dual-balance signal differential receiver/driver circuit to avoid interference of converter, TV tower, high voltage line etc.
• Powerful Recording Function
  • Automatically record the following data:
  • The totalizer data of the last 512 days/128 months/10 years
  • The time and corresponding flow rate of the last 64 times of power on and off events
  • The working status of the last 32 days
• Far Transmission Distance, Easy for Networking
  • RS485 support wireless network, connect GPRS module to accomplish wireless transmission .
• Support Heat Measurement
  • Connect the temperature transducer ,can finish the heat/energy measurement.

Specifications of Inline Ultrasonic Flow Meter

Working Conditions:

	Transmitter	Transducer
Protection grade	IP68	IP68
Temperature	-20~60℃	-30~160℃

Optional Transducer:

π type Pipe Transducer：

Threaded Connection

Norminal Diameter（DN）	Pressure Level（P）	Length(L)	Connecting Thread	Thread Effective length	Standard
DN15	2.5	320	G3/4B	18	GB/T7307-2001
DN20	2.5	360	G1B	15
DN25	2.5	390	G11/4B	16
DN32	2.5	450	G11/2B	22.5

Flanged Connection

Norminal Diameter （DN）	Pressure Level （P）	Length (L)	Flange Dimension							Standard
			Outer Diameter D	Diameter of center hole in bolts D1	Diameter of bolt hole ×Quantity Φ×n	Diameter of Sealing surface  D2	Flange thickness		Bolting Specification
							c	f
DN 15	2.5	320	95	65	14×4	46	14	2	M12×50	GB/ T9119-2000
DN 20	2.5	360	105	75	14×4	56	16	2	M12×50
DN 25	2.5	390	115	85	14×4	65	16	2	M12×60
DN 32	2.5	450	140	100	18×4	76	18	2	M16×60

Standard Pipe Transducer：

Norminal Diameter （DN）	Pressure Level （P）	Length (L)	Flange Dimension							Standard
			Outer Diameter D	Diameter of center hole in bolts D1	Diameter of bolt hole ×Quantity Φ×n	Diameter of Sealing surface  D2	Flange thickness		Bolting Specification
							c	f
40	1.6	300	150	110	18×4	84	18	2	M16×60	GB/T9119-2010
50	1.6	300	165	125	18×4	99	20	2	M16×70
65	1.6	300	185	145	18×4	118	22	2	M16×70
80	1.6	225	200	160	18×8	132	20	2	M16×70
100	1.6	250	220	180	18×8	156	22	2	M16×80
125	1.6	275	250	210	18×8	184	22	2	M16×80
150	1.6	300	285	240	22×8	211	24	2	M20×80
200	1.6	350	340	295	22×12	266	26	2	M20×90
250	1.6	450	405	355	26×12	319	28	2	M22×90
300	1.6	500	460	410	26×12	370	32	2	M22×90
350	1.0	550	500	460	23×16	428	28	4	M20×80
400	1.0	600	565	515	25×16	482	30	4	M22×90
450	1.0	700	615	565	25×20	532	30	4	M22×90
500	1.0	800	670	620	25×20	585	32	4	M22×90
600	1.0	1000	780	725	30×20	685	36	5	M27×110
700	0.6	1100	860	810	25×24	775	32	5	M22×90
800	0.6	1200	975	920	30×24	880	32	5	M27×100
900	0.6	1300	1075	1020	30×24	980	34	5	M27×100
1000	0.6	1400	1175	1120	30×28	1080	36	5	M27×110

Specifications

Accuracy	±1%
Flow range	0~±10m/s
Pipe Size	DN15~DN6000mm
Fluid temperature	-30~160℃
Fluid types	Water, seawater, sewage, acid, alkali, alcohol, beer, various oils, etc. can conduct ultrasonic waves as a single uniform liquid
Piping material	Steel, stainless steel, cast iron, copper, PVC, aluminum, fiberglass and all other high quality pipes with lining are allowed
Outputs	1 channel 4-20ma current output impedance 0-1k, accuracy 0.1% 1 channel OCT pulse output pulse width 6-1000ms 1 channel relay output
Signal input	3-channel 4-20ma current input, the data collector can be connected to three-wire PT100 platinum resistance to realize heat measurement
Communication	RS485, Modbus Protocol
Power supply	DC8~36V or AC10~30V AC85~264V，Equipped with waterproof power adapter

Extended reading: Magnetic Large Dia. Pipe Flow Meter

InLine Ultrasonic Flow Meter optional hosts:

Of course, in addition to integrated installation. In-Line Ultrasonic Flow Meter can do split installation. According to the measurement conditions, different hosts can be selected.

Wall mounted 2000S1
Power supply:DC8~36V or AC85-264V

Wall mounted 2000S2
Power supply:DC8~36V or AC85-264V

Panel mounted 2000U
Power supply:DC 8~36V or AC85-264V

Module mounted 2000M
Power supply:DC 8~36V 

Wall mounted 2000S4
Power supply:DC8~36V or AC85-264V

Inline Ultrasonic Flow Meter Working Principle

Inline Ultrasonic Flow Meter is a meter that measures the flow of liquid in a round tube based on the principle of ” transit Time”. It adopts advanced multi-pulse technology, signal digital processing technology, and error correction technology. The flow meter can be more adapted to the environment of the industrial site, and the measurement is more convenient, economical, and accurate. The products have reached the advanced level at home and abroad and can be widely used in petroleum, chemical, metallurgy, electric power, water supply, and drainage fields.

Ultrasonic flowmeters are the same as electromagnetic flowmeters. Because the flow channel of the instrument is not equipped with any obstructions, it is an unobstructed flowmeter. It is a type of flowmeter suitable for solving difficult problems in flow measurement. Especially in large-diameter flow measurement. The advantages. It is one of the rapidly developing types of flow meters.

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

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Pipe section In-line sensors

Pipe section sensor: The pipe section sensor is a measurement method in which the pipe section sensor is directly connected to the pipeline under test by using a flange or thread. This sensor solves the problem of man-made or measured pipelines during the installation of the external clamps and plug-in sensors. Errors caused by inaccurate parameters. It has the characteristics of high measurement accuracy, good stability, and maintenance-free.

Clamp-on ultrasonic flow meter

Clamp on Ultrasonic Flow Meter ( Model: 3000S) is composed of a host and an external clamp sensor. The flow measurement of various liquids can be completed by simply sticking the external clamp sensor on the surface of the pipeline. Compared with the traditional flowmeter, it does not need to cut off the pipe and flow, the installation is convenient and quick, and it truly realizes the lossless installation. Compared with the common TDC algorithm of other manufacturers, TGA measurement technology is an algorithm for measuring process time with higher speed and higher accuracy.

Extended reading: Ultrasonic flow detectors types

Insertion Ultrasonic Flow Meter

Insertion Flow Meter ( Model:2000S) solves the problem of signal attenuation when ultrasonic Clamp on flow meter works for a long time and the problem of fouling on the inner surface of the pipe without receiving the signal. It can be installed without stopping production. It can be applied to various pipes such as steel pipe, cast iron, FRP, PVC and cement pipe.

Read more about: Ultrasonic flow meters types & technical guide

Sino-Inst, Manufacturer for InLine Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of DN32—6000mm. It can measure even liquids such as water, seawater, oil, and slurry.

Sino-Inst’s InLine Ultrasonic 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.

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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.

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