The working principle of ultrasonic level gauge is based on the measurement of the propagation time of sound waves. The sensor emits ultrasonic pulses, and when the sound wave encounters the surface of the measured medium, it will be reflected back. The sensor receives the reflected signal and calculates the round-trip time of the sound wave. Due to the known propagation speed of sound waves in air, the liquid level height can be calculated through time difference.

Split design refers to the installation of sensors (probes) and transmitters (signal processing units) separately, usually used in high-temperature, corrosive environments or situations that require remote signal transmission. The probe is directly installed on the container or storage tank, while the transmitter can be installed in a location that is easy to observe and operate, and the two are connected by cables.