Rotation detector stops the belt conveyor when the speed lowers under the nominated minimun speed. Lowering of the speed is always caused by some disturbances in operation conditions and the conveyor must be stopped to clear up the disturbance. In larger conveyor systems the equipment and the conveyors before this belt conveyor will usually stop also. Belt rotation detector ES10 is meant to be installed to the return idler support. Thus are avoided the problems of the  rotation detector situated on the end of the traditional tail pulley (for ex. rubbing the pulley into the material, often the long cabling ways to the tail pulley). Installation to the conveyor leg or other frame construction is easy. Placing near the drive-end will reduct the guiding cablings on long belt conveyors