FMU820 Modular Ultrasonic Flowmeter

Ultrasonic flow meters are instruments that measure flow by detecting the effect of fluid flow on an ultrasonic beam (or ultrasonic pulse).
Clamp-on or tube-segment ultrasonic flow meters are based on the principle of “velocity difference method” to measure the liquid flow in a circular tube. It adopts advanced multi-pulse technology, signal digital processing technology and error correction technology, which makes the flow meter more suitable for the environment of the industrial site, and the measurement is more convenient, economical and accurate. The products have reached the advanced level at home and abroad, and can be widely used in petroleum, chemical, metallurgy, electric power, water supply and drainage and other fields.

Parameter :

Main machine Principle Ultrasonic time difference principle, 4-byte IEEE754 floating-point arithmetic
Precision Flow: better than ± 1%
Display Can connect 2 × 10 backlit Chinese characters or 2 × 20 character LCD, support Chinese, English, Italian three languages
Signal output 1 4 ~ 20mA current output, impedance 0-1K, accuracy 0.1%

1 OCT pulse output (pulse width 6-1000ms, default 200ms)

1 relay output

Signal input 3 channels 4 ~ 20mA current input, accuracy 0.1%, can collect temperature, pressure, liquid level and other signals

Can be connected to a three-wire PT100 platinum resistor for heat measurement.

Data interface Isolated RS485 serial interface, the flowmeter can be upgraded through a PC, supporting protocols such as MODBUS
Dedicated cable Custom twisted pair, generally limited to 50 meters; RS485 communication is used, and the transmission distance can reach more than kilometers
Pipeline situation Pipe material Steel, stainless steel, cast iron, cement pipes, copper, PVC, aluminum, fiberglass and other dense pipes are allowed to be lined
Inner diameter of tube 15-6000mm
Straight pipe section Sensor installation point 0 is good: 10D upstream, 5D downstream, 30D from the pump outlet (D refers to the pipe diameter)
Measurement medium Medium Single, uniform liquid that can transmit ultrasonic waves, such as water, seawater, industrial sewage, acid and alkali liquids, alcohol, beer, various oils
Temperature Standard probe: -30 ~ 90 ℃, high temperature probe: -30 ~ 160 ℃
Turbidity 10000 ppm with low bubble content
Flow rate 0 ~ ± 10 m / s
Working environment Temperature Host: -20 ~ 60 ℃, flow sensor: -30 ℃ ~ 160 ℃
Humidity Host: 85 percent; Flow sensor: Can be immersed in water, water depth ≤ 2m (Note: After the sensor is glued)
Power supply DC8 ~ 36V or AC85 ~ 264V
Power consumption 1.5W


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