Non contact ultrasonic level switch is a kind of non-contact, high reliability, high cost performance, easy installation and maintenance of material level measuring instrument.It doesn't have to contact medium can meet the requirements of most of the material level measurement.Firing pulse and receives the pulse interval and the antenna to the surface of the measured medium is proportional to the distance, to calculate the distance on the surface of the antenna to the measured medium. Ultrasonic Level Sensor, As shown in Picture below, the ultrasonic sensor Tx transmits ultrasonic waves reflected after encountering an obstacle received by the ultrasonic sensor Rx calculates the distance d of the obstacle according to Time-Of-Flight (TOF):d = (C x t)/2
