Portable Doppler flow meter

Product Introduction

Principle of portable Doppler flowmeter: When the ultrasonic sound source and the observer move relative to each other, the frequency received by the observer will be different from the frequency of the ultrasonic sound source. Therefore, small particles and small bubbles moving with the water relative to the ultrasonic transducer will also change the transducer receiving frequency, and increase with the increase of the suspended motion speed in the water. The Doppler frequency shift is thus measured, and the flow rate of the water at the point where the Doppler flowmeter is located is also measured. It is mainly used in irrigation open channels, municipal sewer pipes, hydrological basins and other occasions. It is particularly suitable for low water level occasions and can work when the water level exceeds 15 cm. In regular pipes and channels, the water depth is measured by the pressure sensor on the flowmeter, and the flow rate is measured by the ultrasonic sensor, so the flow rate can be easily calculated.

The product measures the flow rate based on the principle of ultrasonic Doppler effect, and can measure the water level through the pressure sensor and the water temperature through the temperature sensor. The shell is made of PVC plastic, which can effectively waterproof and seal. The shell is 25 cm long, 3 cm high and 7 cm wide. It can measure flow rate in open channels and relatively large pipes.

Product features

1. Modbus communication protocol is adopted, and RS485 bus is used for communication.

2. The product communication command is simple.

3. The underwater sensor equipment is easy to install. There is a metal base fixing device, which is easy to install.

4. The equipment is all electronically designed, with wide voltage power supply, low power consumption, and no mechanical parts.

5. It has the advantages of accurate and stable measurement, high reliability, and strong anti-interference.

6. It has a wide range of applications. It can be used in various water environments from tap water to Yellow River water.

Product test indicators

Content Range Accuracy

Flow rate range (m/s) 0.03～5.00 ±1.0%±1cm/s

Water temperature measurement (℃) -10～60 ±1 (℃)

Water depth measurement range (m) 0.05～10 (default maximum range 10 meters) 0.5%±0.5cm

Performance indicators

Electrical content          Range                                                                                                        Remarks

Working voltage (V)      7.2~15                                                                                                          DC

Current power consumption (mA) <=85mA (transmitting moment) Static current 6.5mA       12V power supply

Data update cycle (s) 8 seconds                                                                                                          default

Dimensions 25 cm long, 7 cm wide, 3 cm high

The default is 15 meters of air guide cable when leaving the factory. If there are special requirements, please indicate in advance when ordering.

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