Ultrasonic level sensors are a highly reliable method of detecting objects and measuring distance and fill level. These non-contact sensors can be compatible with any industrial application and have proven to be an excellent alternative to optical or capacitive sensors. It can be widely used to measure the height of all kinds of liquid and solid materials, especially in some high hygienic requirements of the site has irreplaceable advantages. (1) ultrasonic level meter measurement process without contact with the medium, with good stability, can be installed in the silo and the upper part of the liquid tank ultrasonic level meter. (2) The measurement area is wide and can be liquid, or powder level measurement. (3) It can realize fixed point continuous, signal measurement, telemetry and remote control measurement. (4) Affordable price, lower cost than the radar level meter.