Kistler’s torque sensors of type 4503A… can measure both peak and average operating torques with a high degree of accuracy. Extreme ratios of high peak to moderate operating torque arise, for example, during starting and abrupt deceleration or braking of presses and elevators. Torsional vibration encountered in combustion engines, pumps and compressors, etc., also often leads to unwanted peak loads. To prevent such effects causing overloads, conventional sensors therefore have to be designed to withstand the peak. However, the signal resolution available for the much smaller actual operating torques is then frequently insufficient for accurate measurement.

The dual-range sensor offers the ideal solution. It is sufficiently robust to withstand and measure peak values without damage, yet its second range offers sufficient resolution for accurate recording of even the small operating torques.

Models with rated torques between 0,2 N∙m and 5 000 N∙m are offered, with the option of range ratios of 10:1 or 5:1 from 1 N∙m. The accuracy class is 0,1 (rated torque range) and 0,2 (second range) respectively. An optional version offers an enhanced accuracy of linearity of 0,05 %.

Power is supplied and the measurement signals transferred between the rotating shaft and the case without contact enabling speeds of up to 50 000 rpm. The DC supply and the calibrated signal outputs of ±10 V facilitate integration into test stand concepts. There is also a serial data interface available.