Recently, a customer called and said that he wanted to measure the flow output of circulating water. The diameter of the pipe is also not sure what it is. Very vague consultation. Said to use a Doppler flowmeter. Our technical engineer said if the measurement is circulating cooling water. Cannot be measured with a Doppler flowmeter. It is only used in rivers and channels. Doppler measurement principle: double-beam acoustic Doppler profile flow measurement technology to measure. At present, it is recommended that he use an external clamp-type flowmeter, and the principle of measurement is the time difference method. Technical parameters of dual-beam acoustic Doppler profile flow measurement technology:
Measurement principle: dual-beam acoustic Doppler profile current measurement technology; Flow velocity measurement range: ±0.01m/s—±5m/s, maximum ±20m/s; Flow velocity measurement accuracy: ±1%, ±5mm/s; Maximum profile distance: 120m; Transducer wave velocity angle: 1.5°±0.2°; The maximum number of layers in the unit: 128 layers, and the flow velocity of the layered profile can be displayed; Layer thickness range: 0.5-4m; Water level measurement range: 0.1-20m; Water level measurement accuracy: 0.5%, ±5mm; Communication interface: RS232, RS422, MODBUS interface; The instrument directly outputs data: average flow rate, water level, real-time flow, cumulative flow; the instrument directly outputs data without any external transfer calculation module to prevent tampering with the original data. Alarm output function: can output low water level alarm, instrument tilt alarm function; Built-in storage: It can store the flow rate data for more than one year, and has the function of re-issuing data over time to meet the needs of the central platform to retrieve flow data in real time. Protection level: IPX8 and IP6X are required After comparison, the customer found that the principle of the time difference method of using the clamp-on flowmeter was indeed suitable for him. He said he was very satisfied with the advice we gave. We are a professional technical manufacturer of ultrasonic flowmeters, if you need it, welcome to consult!