Rexnord announced Monitorq, a robust and reliable torque measuring device that can be integrated into a drive line using standard power transmission products such as couplings, pulleys and gears. It is comprised of a strain-gauged torque ring and an E-90 Sensor. The E-90 Sensor provides the torque ring with inductive power and receives a radio signal back from it. The radio signal is converted into an output signal proportional to torque that can be directly connected to a control system, or shown on a dedicated screen.
http://www.rexnord.com