Portable ultrasonic flow meter is a flow measurement instrument based on ultrasonic technology, which uses the principle that when ultrasonic is propagated in the fluid, the propagation speed in the direction of the forward flow and the reverse flow will change to measure the flow rate of the fluid, and then calculate the flow rate. The following is a detailed introduction to the portable ultrasonic flow meter:

Basic principle

The portable ultrasonic flow meter uses the principle of low voltage and multi-pulse time difference, and adopts the digital detection technology of high-precision and ultra-stable double-balance signal differential transmission and differential reception. When the ultrasonic beam propagates in the liquid, the flow of the liquid will cause a small change in the propagation time, and the change in the propagation time is proportional to the flow rate of the liquid. At zero flow, the time required for both sensors to transmit and receive sound waves is exactly the same (this is the only technology that can actually measure zero flow); When the liquid is flowing, the transmission time of the sound wave in the countercurrent direction is longer than that in the forward direction.

Product characteristics

• Non-contact measurement: no direct contact with the fluid, will not cause interference to the fluid, will not be subjected to fluid corrosion and wear.
• High precision: can provide more accurate flow measurement results.
• Portability: can be easily carried to different measuring sites for use, suitable for a variety of field conditions.
• Versatile: It can be used to measure the flow of various liquids and gases from 2cm to 5m.
• Strong adaptability: can be adapted to a variety of pipe diameter measurement and a variety of flow range measurement.

Application field

Portable ultrasonic flow meter is widely used in petroleum, chemical industry, metallurgy, textile, environmental protection, food and other sectors and water conservancy construction. Specifically, it can be used to monitor river flows and help researchers understand hydrological changes and predict flood disasters. Monitor the water level and discharge of lakes and assess water quality; Real-time monitoring of river flow to support flood control and drought decision making; To provide data support for rational allocation of water resources; Help farmers accurately control irrigation water, improve irrigation efficiency and reduce waste; Monitor incoming and outgoing water flow of sewage treatment plant and evaluate treatment effect; Monitor the flow of urban drainage system to ensure the normal operation of drainage system; Monitor the flow and water quality parameters of industrial wastewater discharge outlets to ensure that the discharge meets environmental standards.

Advantages and Disadvantages

Advantages:

• There is no pressure loss without changing the flow rate of the fluid.
• It is easy to install, and the cost is basically independent of the diameter of the pipeline being tested.
• Measure the flow rate of highly corrosive and non-conductive media.
• The measured volume flow rate is not affected by the thermal characteristics of the measured fluid, such as temperature, pressure, viscosity, and density.

Cons:

• The temperature measurement range is not high, and usually only fluids with temperatures below 200°C can be measured.
• It is easy to be disturbed by ultrasonic noise caused by bubbles, scale, pumps and other sound sources, thus affecting the measurement accuracy.
• Installation uncertainty or scaling of measuring pipes can seriously affect the measurement accuracy.

Matters needing attention

• Before using the portable ultrasonic flow meter, it should be ensured that there are no interference factors such as bubbles and scale in the measurement pipeline.
• When installing, ensure that the coupling between the sensor and the pipe is good to improve the measurement accuracy.
• The flow meter is calibrated and maintained regularly to ensure its long-term stable operation.

In summary, the portable ultrasonic flow meter is a high-precision, multi-functional, portable flow measurement instrument, with a wide range of applications and significant advantages. However, it is also necessary to pay attention to its shortcomings and limitations during use to ensure the accuracy and reliability of the measurement results.

If you want to know more about the flow meter or flow meter selection, please consult the Aister flow meter manufacturer email: sales@aistermeter.com for help.