U500 ultrasonic sensors are identical in design and size with their series O500 electronic counterparts. This OneBox design also applies to every available sensor principle and offers the user maximum flexibility during the planning phase. With subsequent modifications in a system's requirements profile, the sensors can be exchanged quickly and easily without any additional conversion measures. In addition to the U500 and O500, the smaller O300 completes Baumer's new performance category for applications with limited space.