A self-contained multi-function diffuse ultrasonic sensor with a sensing range of 600 to 6000 mm. The analog output is easily set up in 2 set points, pos./neg. slope and adjusted by teach-in, makes it ideal for level control tasks in a wide variety of vessels. A sturdy one-piece ABS housing provides the perfect packaging for the sophisticated microprocessor controlled and digitally filtered sensor electronics. Excellent EMC performance and precision are typical features of this sensor based on true distance measurement.