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Sensors combine continuous fluid flow sensing with visual indication

28 July 2010

Gems Sensors and Controls has introduced the RFO RotorFlow Series of fluid flow sensors for flow rate monitoring and metering applications. The sensors provide a pulsed dc voltage output that is proportional to the rate of flow. The 4.5 to 24Vdc pulsed output is easily integrated into most digital logic units. RotorFlow features a highly visible paddlewheel that provides immediate visual confirmation that fluids are moving.
As liquid passes through the RotorFlow RFO body, a magnetic rotor spins at a rate proportional to flow. The magnetic fields turning with the rotor excite a static Hall Effect sensor, located in the body, and generate a series of voltage pulses. The output pulse voltage is equivalent to input (4.5 - 24 VDC), with a frequency proportional to the flow rate. Digital rate meters, totalizers, and other electronic controllers then utilize the output signal.

RotorFlow sensors are offered in ¼in to 1in port sizes, and monitor fluids with flow rates ranging from  0.4 to 227 litre/min. Accuracy is dependent on model and flow range selected, and is typically within ±7%. RotorFlow sensors combine their high visibility rotors with solid-state electronics that are packaged into compact, panel mountable housings. Housing bodies are available in brass, stainless steel or polypropylene.

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