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

Ultrasonic water flow meters

Ultrasonic water flow meter types

According to the measurement principle

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

According to the way of use

According to the installation method of the transducer

  • Standard pipe section ultrasonic flowmeter;
  • Clip-on ultrasonic flowmeter;
  • On-site hole-opening plug-in ultrasonic flowmeter.

According to whether the transducer is in contact with the fluid

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

According to the nature of the measured fluid

  • Liquid ultrasonic flowmeter;
  • Gas ultrasonic flowmeter.

According to the number of transducer channels

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

Extended reading: 2 inch Water Flow Meter

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Extended Reading: Inline Ultrasonic Flow Meter

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

Extended reading: Industrial VS Residential inline water flow meters

Ultrasonic Clamp on Flow Meter

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

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

Clamp on Flow Meter Reference price: USD 470.00/pc

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

Handheld Ultrasonic Flow Meter

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

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

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

Extended Reading: Chilled Water Flow Meter

Ultrasonic Gas Flow Meters

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

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

Featured Ultrasonic water flow meters

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

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

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

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

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

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

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

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

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

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

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

Extended reading: Ultrasonic flow detectors types

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

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

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