These self-contained rotation speed monitoring sensors have the special feature of incorporating, in the same case, the pulse sensing.processing electronics as well as the output switching amplifier that are required to establish an integrated rotation monitoring device. The unit provides an economical solution for detecting slip, belt breakage, drive shaft shear and overloading, etc., in the following applications: conveyor belts, bucket elevators, Archemedian screws, grinders, crushers, pumps, centrifugal driers, mixers, etc. The main technical parameters of a sensor Model: XSA-V11801 Shape: M30 threaded cylindrical Output Type: two-wire normally open Operating voltage: 20 to 264V AC / DC Switching capacity: 5 to 200 mA DC 5 ~ mA AC Voltage: ≤ 5.7V Ambient temperature: -25 to +70 ° C Detection distance: 4 to 6mm Response time: 10 ~ 0.4s (6 to 150 pulse / min)