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.