A digital noncontact wireless system provides power to rotating electronics on the shaft. It also transmits digital signals to the receiver. Torque signals are represented as calibrated high-level voltages. Wireless transmission also reduces electrical noise, while increasing frequency responses and speed rating. Optional optical encoder measures angle or speed.

Sensor Developments Inc., 1050 W. Silver Bell Rd., Orion, MI 48359, (888) SENSOR-1, sendev.com