The Williams and Digitool Solutions offer portable electronic torque meters which displays torque readings from sensors that attach between sockets and driver. Tohnichi offer Bluetooth models that elimate the need for a physical connection to the meter.  The Williams 1600-MT2 Multitorq is a highly versatile torque analyzer and data acquisition system that can be used with sockets, extensions, universal joints, ratcheting drivers or any combination of these. Sensors are sold separately, available in 8 ranges from 2-20 in ozs to 150-1500 ft lbs.  Our torque sensors and torque measuring devices offer an accuracy ± 1% of reading (± 2% reading for 20 in. oz., and 10 in. lb.), within 10-100% of sensor range.