HOBBYWING Brushless RPM Sensor

Specifications
Size: 23mm(L) x 10mm(W) x 2mm(H)
Weight: 6g (Input and output wires are included)
Working Voltage: 3.5 to 8.4V (1S to 2S Lipo)
Current: 1 to 5mA
Voltage range of the motor wires: 2 to 14S Lipo
RPM range (for 2 poles brushless motor): 1000rpm to 300000rpm
Working Temperature: 0 to 50 Celsius degree or 32 to 122 Fahrenheit degree

Function of RPM Sensor
It detects the voltage changes at the wires of brushless motor and then outputs the RPM signal. It is suitable for different king of brushless motors and different PWM driving methods.

This RPM sensor can work with some speed control system; one of its typical applications is to work as the RPM sensor for V-Bar system made by Mikado.