This is a performance measuring system designed to measure output power, torque, speed and temperature through monitoring a coupling. The principal behind the POWERLIGN® torque monitoring system is to measure torque deflection on the coupling spacer via sensors. The coupling spacer integrates two sets of intermeshed pick up (gear) teeth. Each set is attached to the ends of the spacer. Two sensors are located over the pick up teeth, at 180° to each other, near the rotating coupling.