Product overview 

The FWV ultrasonic flowmeter is based on the principle-ultrasonic time difference. When the ultrasonic beam travels through the liquid, the flow of the liquid will give rise to a slight change in the propagation time and the change in its propagation time is proportional to the flow rate of the liquid with its relationship complying with the following expression. θ refers to the included angle between the acoustic beam and the flow direction of the liquid, M refers to number of rectilinear propagation of sound beam in the liquid, D refers to propagation time of the pipeline with ΔT=Tup –TdownTup as acoustic beam in the positive direction and  Tdown refers to propagation time of the acoustic beam in the reverse direction. It's an instrument with low-voltage and multi-pulse digital signal processing and error correction technology used to measure the full tube fluid flow rate. It's widely used for the industries such as tap water, environmental protection, thermal power generation, heating, metallurgy, mine, petroleum, chemical engineering, food, medicine, papermaking, steel and lithium battery new energy. 

Product features 

● Large measurement scope: The sensor with different models is chosen, and the measurement of pipeline flow with caliber being DN15~DN6000mm can be realized; 

● Powerful memory function: Automatic memory of the first 512-day, 128-month and *-year cumulative heat and flow is conducted, and the cumulative data for years can be read out via MODBUS protocol; 

● Heat measurement: It's equipped with temperature sensor and can realize the function characteristics of heat measurement; 

● Beautiful appearance, high integration and proprietary appearance design; 

● Household and building ultrasonic heat and cold meter; 

● High precision, low pressure loss, micro power consumption and low dynamic flow rate;   

● With 100: 1 high range ratio; 

● Power supply by built-in lithium battery; 

● Supporting multi-bus, multi-protocol and flexible networking; 

● High reliability: The low-voltage and multi-pulse transmitting circuit is used with high measurement precision, service life and reliability; 

● Strong capacity of resisting disturbance: The double balance signal differential transmitting and receiving circuit are used, and the strong interference sources (such as transducer, television tower and high-tension cable) is effectively withstood. 

Technical parameters 

● Caliber: DN15～DN2000 carbon steel (flange); 

● Ambient temperature: +5～+55℃; 

● Storage temperature: +5～+55℃; 

● Ambient humidity It; 93％rh; 

● Environment grade: Grade A  EN1434／CJ128; 

● Accuracy class: Level 2 EN1434／CJ128; 

● Protection grade: IP65; 

● Pressure loss: lt; 10kpa/qp; 

● Operating pressure: PN16/PN25; 

● Temperature difference threshold value: 0.3K; 

● Medium temperature range: -30～160℃; 

● Temperature difference scope: 2～85K; 

● Temperature resolution: 0.01℃; 

● Flow range ratio: 50:1; 

● Operating voltage:  Power supply by built-in lithium battery; 

● Installation way: Horizontal or vertical installation (refer to installation instructions for the detail); 

● Hot (cold) carrier: Water; 

● Temperature sensor: Platinum resistor. 

● Optional fixed external clip type ultrasonic flowmeter sensor: 

Product model selection