Designed to generate a signal used to control the speed of the belt conveyor belt in UKPS and UKS devices. The sensor is designed to work on the surface and in mines, hazardous for gas or dust, in a temperate and cold climate in rooms of category 3.5 in accordance with GOST 15150-69. The scope and conditions of the sensor application in mines - in accordance with the "Safety Rules in Coal and Shale Mines". Execution RO, Ia