The very compact US-46 ultrasonic sensors in rectangular form have a detection range up to 500 mm. Versions are available with synchronization input. The sensors work reliably in the presence of dust, dirt, mist and light, and measuring is done independent of surface, color and size of the target object. Transparent and shiny objects are also detected precisely. The robust housing of these ultrasonic sensors in protection class IP 67 is waterproof and oil-resistant.