Electronic Rotary Cam Limit Switches...

... improve productivity in shaft-based automated machinery. Used as stand-alone On/Off switching controls or as shaft position sensors input to PLCs, they can be used to control machine devices such as glue guns, solenoids, air cylinders or mechanical relays.

Cam Switches are best suited to machinery that is set up once, then run for long periods of time without changes in product configuration
or size.