RotorFlow Sensors Combine Continuous Fluid Flow Sensing with Visual Indication

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. A subset of the RFO type RotorFlow sensors is the RFA Type. These use the same operating principle, but instead of outputting a voltage pulse they are conditioned to provide an analog output signal of 0-10 VDC.

RotorFlow sensors are offered in ¼” to 1” port sizes, and monitor fluids with flow rates ranging from 0.4 LPM to 227 LPM (0.1 GPM to 60 GPM). 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. Brass and SS bodies provide operating pressures (@ 21°C) to 200 13.8 bar, while polypropylene allows 6.9 bar. Maximum media temperature for polypropylene models is 82°C and with brass or SS bodies is 100°C.