Futaba FASSTest Telemetry Optical RPM Snsr

Suitable for use with both Futaba T-FHSS and FASSTest telemetry enabled receivers.

This optical rpm sensor is capable of measuring the rotational speed of propellers, rotor blades etc. and with a telemetry enabled receiver and transmitter, is capable of giving real-time information direct to the transmitter. For best results, ensure that the propeller or rotor being measured is fairly brightly lit. Typically the sensor will not operate properly indoors, on very cloudy days or in very early mornings/late evenings when the angle of the light striking the prop or rotor is poor.