Reaction Torque Sensors can be used in the measurement of Clutch/Motor rotary forces. In this application a Reaction Torque Sensor is bolted to the motor and to a fixed plate which then connects to a Clutch or Brake. The rotating shaft goes through the Reaction Torque Sensor (but does not contact sensor) where it connects to the motor. FUTEK’s TFF400 - TFF750 series would be ideal for usage in this case. For more tips on Torque Sensor Applications read this article on how to select a Torque Sensor.