Doppler flowmeter

Principle of Doppler Flow Meters: When the ultrasonic source and the observer are moving relative to each other, the frequency received by the observer differs from that of the ultrasonic source. Consequently, small particles and air bubbles moving with the water relative to the ultrasonic transducer will also cause a change in the frequency received by the transducer, which increases as the velocity of the suspended particles in the water increases. By measuring this Doppler shift, the flow velocity of the water at the location of the Doppler flowmeter is determined.

It is primarily used in open irrigation channels, municipal sewer pipes, hydrological basins, and similar applications. It is particularly suitable for low-water-level conditions, as it can operate with water levels as low as 15 centimeters. In standard pipes and channels, the flow rate can be easily calculated by measuring water depth using the pressure sensor on the flow meter and flow velocity using the ultrasonic sensor.

The product measures flow velocity based on the ultrasonic Doppler effect and can measure water level via a pressure sensor and water temperature via a temperature sensor. The housing is made of PVC plastic, providing effective waterproof sealing. The housing measures 25 cm in length, 3 cm in height, and 7 cm in width. It can measure flow velocity in open channels and relatively large pipes.

• Android smart operating system with a large-screen color touchscreen.

• Equipped with Wi-Fi connectivity; monitoring data can be uploaded to the platform for statistical analysis and regulatory alerts.

• Monitors flow rate and flow volume in both directions; data is displayed in real time on the device, and cumulative totals and total flow rates for both directions are calculated.

• Built-in GPS positioning displays the monitoring location and IP address in real time, facilitating data analysis.

• The device features automatic data storage with configurable intervals, eliminating the need for manual data collection.

• Real-time display of current water level, temperature, cross-sectional area, and total flow rate.

• Equipped with a 6000mAh high-capacity lithium battery to ensure monitoring endurance.

• The underwater sensor device is easy to install. It features a metal base mounting bracket for simple installation.

• The device is entirely electronically designed, featuring wide-voltage power supply, low power consumption, and no mechanical parts.

• Offers the advantages of accurate and stable measurements, high reliability, and strong resistance to interference.

• Wide range of applications. Can be used in various water environments, from tap water to Yellow River water.

• The overall dimensions of the instrument do not exceed 25cm x 7cm x 3cm, ensuring portability for field personnel.