Woodward speed switches defend your engine or equipment against the damaging and dangerous conditions of overspeed and underspeed. Our speed switches offer many choices—from single-channel, manually adjustable models to multiple-channel, software configurable model
A speed switch is an electronic device that senses rotational motion and speed. The speed switch obtains a signal from a sensor device (magnetic pick-up,Mini-Gen®signal generator, alternator, or ignition coil) in the form of a frequency. This frequency is monitored electronically within the switch. When the speed or frequency reaches the desired setting or set point, the output relay tied into the control circuit is energized or switched.