TEL-SC split collar telemetry 1 to 12 channels

A collar that opens around the shaft

The TEL-SC is a split collar hoop with the telemetry and the induction power system built in. It uses Michigan Scientific M-320 Series digital telemetry, with integrated strain gage or thermocouple drivers and differential amplifiers, and transmits the data digitally without contact. Hoops are made to fit shafts of 23 mm (0.9 in) and larger, from small half shafts to large drive shafts, with a radial thickness as small as 12.1 mm (0.475 in). Hoops under 76 mm (3 in) in diameter take up to three channels; larger hoops take up to twelve.

The collar closes around the shaft, so it is fitted and removed without modifying or dismantling the shaft ends, and without a custom induction system for each shaft. It can move to another shaft of the same diameter, or to a smaller one with bushings. A stationary primary coil powers it, either a double loop or a paddle-style primary. The TEL-SC is supplied alone, for sensors installed by the user, or with Michigan Scientific strain gaging and calibration services.

Its datasheet shows a 1.2 in collar on an automotive half shaft with a double loop induction primary, and a 3.5 in collar on a wind turbine drive shaft with a paddle-style primary.