Leuze electronic hrtu 412 ultrasonic proximity sensor w background suppression leuze electronic 50113993 a small ultrasonic scanner with background suppression in an m12 threaded brass cylindrical housing with protection class ip67 the sensor exhibits switching behaviour that is largely independent of the surface properties of the target and there is precise switching point adjustment through a teach in facility on the sensor and via cable leuze electronic 50113993 hrtu 412 4no 2 s s12 ult