The Torkdisc® rotary torque sensor system from the Force/Torque Division of PCB Piezotronics (Depew, NY) is a compact, in-line rotary torque sensor for spindle qualification testing of machining center and other torque measurement applications where space is minimal. The sensor features high torsional stiffness and low sensitivity to axial and thrust bending moments.

The sensor also features a telemetry system that consists of an onboard electronic module that converts torque signals into high-speed digital representation. Once in digital form, the data is transmitted to a non-contacting pick-up loop, with no risk of noise or data corruption. A remote receiver unit converts the digital data to a high-level analog output voltage, frequency output, and a serial digital output. The sensor offers capacities from 2,000 to 225,000 in-lb full-scale, and maximum speeds to 15,000 RPM.