The 917A is an anlogue shaft speed sensor which is mounted in a rugged cast aluminium enclosure. 917A sensors are supplied with a mounting bracket and are recommended for use with pulser discs and split collar pulser wraps.

The 917A sensors allows for a large gap distance of 1/4" ± 1/8" between the sensing surface and the pulse generator’s target magnets. Standard 917A sensors come with 10 feet of 2-wire shielded PVC cable and can be mounted up to 1,500 feet from the control unit (i.e. speed switch or tachometer).