Checkline R52 [MR52-12] Torque Sensor, Tool Calibration, 12 lbFin / 135 Ncm Capacity. Calibrate torque tools with this torque measurement sensor, or use it as a component of a torque testing system. Tapped holes on every surface allow for easy mounting to a work bench, or fixture within a testing system. Capacities available from 10 ozin to 100 lbin.