Doppler Flow Meter

Product Introduction

Doppler velocity meter principle: when an ultrasonic sound source and an observer move relative to each other, the frequency received by the observer differs 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 receiving frequency of the transducer, and this change increases with the increase in the movement speed of suspended matter in the water. The Doppler frequency shift is thus measured, and consequently the flow velocity of the water at the point where the Doppler velocity meter is located. It is mainly used in irrigation channels, municipal sewer pipes, hydrological basins and other occasions. It is especially suitable for low-water-level occasions: it 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 velocity meter and the flow velocity by the ultrasonic sensor, so the flow can be conveniently calculated.

The product measures flow velocity based on the ultrasonic Doppler effect principle, and can measure water level through a pressure sensor and water temperature through a temperature sensor. The housing is made of PVC plastic for effective waterproof sealing. The housing is 25 cm long, 3 cm high and 7 cm wide. It can measure flow velocity in open channels and relatively large pipes.

Product Features

(1) Handheld design with battery power, compact and lightweight, accommodating mobile detection needs;

(2) Unidirectional monitoring of flow velocity and flow rate;

(3) High-performance quad-core processor with Android system, friendly interface, simple and smooth operation;

(4) With WiFi networking capability; detection information can be uploaded to the platform for data statistics and monitoring and early warning;

(5) Monitors flow velocity and flow; data is displayed instantly on the instrument and total cumulative flow is counted;

(6) Built-in GPS positioning function, which can display the monitoring location instantly for easy data analysis;

(7) The instrument has an automatic storage function with a settable automatic storage interval, replacing manual intelligent data collection;

(8) Detection result storage capacity of 1 million records, supporting data storage and retrieval;

(9) Detection results can be exported to Excel spreadsheets and viewed when connected to a computer;

(10) Real-time display of current water level, current temperature, cross-sectional area and total flow;

(11) Equipped with a 6000 mAh large-capacity lithium battery to ensure monitoring endurance;

(12) Adopts the Modbus communication protocol and communicates via RS485 bus;

(13) The underwater sensor device is easy to install, with a metal base fixing device for simple installation;

(14) The equipment is fully electronically designed, with wide-voltage power supply, low power consumption and no mechanical parts;

(15) Features accurate and stable measurement, high reliability and strong anti-interference;

(16) Wide application range; can be applied in various water environments from tap water to Yellow River water;

(17) The overall size of the instrument is no more than 25 cm × 7 cm × 3 cm, ensuring lightweight use by staff;

(18) Standard Type-C charging; a phone charger can be used directly to charge the device;

(19) Features flow velocity correction and water level correction functions;

(20) Continuous detection; the data acquisition time can be set in seconds;

(21) The interface settings allow modification of the title and footer information, flexibly displaying instrument information;

(22) Features automatic backlight adjustment and sleep time setting functions;

(23) The device displays the remaining battery level;

(24) IP65 protection rating.

Technical Parameters