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 the two sensors to transmit and receive sound waves is exactly the same (the technology that can actually measure zero flow). When the liquid flows, the transmission time of the sound waves in the upstream direction is longer than the transmission time of the sound waves in the downstream direction.

The relationship conforms to the following expression:

Among them: θ is the angle between the sound beam and the liquid flow direction

M is the number of linear propagation times of the sound beam in the liquid

D is the inner diameter of the pipe

Tup is the propagation time of the sound beam in the positive direction

Tdown is the propagation time of the sound beam in the reverse direction ΔT=Tup --Tdown

1. High-precision measurement, linearity is better than 0.5%, repeatability accuracy is better than 0.2%, and measurement accuracy is better than ±1%

2. The probe has low power consumption, simple installation and easy positioning. It is widely used in rivers, water supply, factories, urban sewage pipelines and other related fields.

3. The measurement range is large, and different types of sensors can be used to measure the flow of pipes with diameters of DN15-DN6000mm.

4. Support Chinese or English menu. Different versions of flow meters can support Chinese or English menus, which is convenient and quick.

5. Strong reliability, low voltage, multi-pulse transmitter circuit measurement accuracy, service life and reliability are greatly improved.

6. Strong anti-interference ability, adopting double-balanced signal differential transmission and receiving circuit, effectively resisting strong interference sources such as inverters, TV towers, and high-voltage lines.

7. Powerful memory ability, automatically memorize the accumulated flow of the previous 64 days, 64 months, and 5 years, automatically memorize the time and flow of the previous 64 calls and power failures, and automatically memorize whether the flowmeter's working status is normal in the previous 64 days.

8. The built-in remote communication module can make various communication protocols. (METER-BUS protocol, MODBUS protocol, Fuji expansion protocol, simple water meter protocol)

9. RS232/RS485 output, 4-20MA pulse output.