The Series MULS Miniature Ultrasonic Level Switch measures liquid at a single point providing an output for high or low level alarm, overflow prevention, or pump protection. The Series MULS uses ultrasonic wave propagation between the transducer gap to sense the presence or absence of a liquid. Units can be mounted within 15° of horizontal with no additional calibration required. The switches include a 0.5 second delay and have repeatability of less than .08 in. (2 mm). The Series MULS can be used to monitor and control levels of water, chemicals lubricants, acids, or beverages in vessels, storage bins, or tanks.