The FrSky Smart Port RPM and Temperature Sensor have been designed to work with FrSky Smart Port systems, it can measure the RPM of brushless motors from 1,000~30,000rpm and temperatures of -20 to 250 degrees Celsius. Other FrSky Smart Port-enabled sensors including the variometer, lipo voltage, GPS, current, and airspeed sensors can be used at the same time.
Specification
Compatibility: X8R, X6R, X4R receivers etc.
Operating Voltage Range: 4 -10 V DC
Current consumption: 25mA@5V
Measures RPM: 1,000-30,000 rpm
Measures temperature: 20-250°C






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