Dalian Yheng Technology Co., Ltd. is one of the most reliable manufacturers and suppliers of fixed doppler ultrasonic flow meter in China. Welcome to buy high quality fixed doppler ultrasonic flow meter in stock here from our factory. If you have any enquiry about customized service, please feel free to email us.
Technical Parameters
| Measurement categories | Water depth, Flow velocity, Water temperature. | |
| Depth | Range | 0.02 m~10m |
| Resolution | 2 mm | |
| Accuracy | ±0.5% | |
| Flow velocity | Range | The standard is 0.04 m/s ~ 5.00 m/s (the sensor is 20cm above minimum depth) ;Other velocity range can be customized. |
| Resolution | 1 mm/s | |
| Accuracy | ±2%～4% | |
| Temperature | Range | 0～60℃ |
| Resolution | 0.1℃ | |
| Accuracy | ±0.5% | |
| Power supply | battery, 12 VDC; current: 250 mA. | |
| RS485 Output signal(battery) | RS485 output signal content: flow velocity, instantaneous flow, cumulative flow, water level and temperature. | |
| 4-20mA Output signal (external power supply) : |
4-20 ma output signal content: instantaneous flow rate. | |
Operating Principle
- On the premise that the sensor is on the water flow direction, i.e. current direction:
1.When water is static, the transmission and receiving frequencies are the same.
2.The faster the velocity is, the faster frequency the sensor receives signal, but it will be lower than transmission signal.
3.The slower the velocity is, the slower frequency the sensor receives signal, but it will be lower than transmission signal. Hardware and software can calculate water flow direction and velocity. The sensor has to be installed facing the water flow direction.
- On the premise that the sensor is facing the water flow direction, i.e. countercurrent direction:
1.When water is static, the transmission and receiving frequencies are the same.
2.The faster the velocity is, the faster frequency the sensor receives signal, and it will be higher than transmission signal. 3.The slower the velocity is, the slower frequency the sensor receives signal, and it will be lower than transmission signal.
Application
- Smooth Flow Channel
- Wide River Channel
- Gate Site Flow Condition
- Channels with Shallow Water and Washed-away Rocks
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