Futaba Telemetry Sensor Magnetic RPM SBS-01RM

This sensor, when used in conjunction with the Futaba telemetry enabled transmitter/receiver, is used to indicate the number of rotations per minute of the item to which it is attached via the use of magnets. The RPM can be displayed with the appropriate Futaba transmitter.

More information (links):
* Instruction Manual (.pdf)

Weight: 0.2 oz. (4.7g)
Length: 10" (255mm)
Range: 360 to 100,000 RPM
Voltage: 3.7V to 7.4V