The Sensotec 1650B Rotary Torque Sensor literally clamps onto the drive train and, within 15 minutes, converts the shaft into a rotary torque transducer ready to take measurement data. The 1650B System avoids the need to break into the drive train to install an in-line torque cell, eliminates the need for skilled personnel to cement strain gauges into the shaft, and does not require the installation of slip rings. For temporary or permanent installations, this unit is available for shaft diameters from 2.5 inches to 15 inches and can be used at shaft speeds up to 2,500 rpm. Wireless Data Corp., Card No. 306