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RF (Eddy Current) Speed Sensors
RF speed sensors offer low speed response, no drag, large air gaps and sensing characteristics which enable this type of speed sensor to sense non-ferrous metals like aluminum or nonmagnetic stainless steel in addition to ferrous metal. Unlike their VR counterparts, an RF speed sensor is not a passive device and requires coupling with a signal conditioners/preamplifier. These devices produce a digital square wave output versus the analog sine wave of the VR speed sensor.