The ZP300 tuning fork material (liquid) level switch is designed based on the damping effect and piezoelectric effect of the medium on the vibration of the tuning fork. The sensing part for detecting the material (liquid) level is composed of a tuning fork, which has a fixed vibration frequency and amplitude. When the tuning fork is subjected to the damping effect of the medium, the tuning fork stops vibration and the control circuit drives the relay to send a switch signal. This product can adapt to harsh working conditions on-site, work reliably, and is the most widely used product in material (liquid) level switch instruments. Equipped with automatic learning function, it can learn different media densities through buttons without calibration; All metal structure, sturdy and durable; The vibration amplitude of the fork body is large, reaching over 10mm, which can shake off low viscosity local hanging materials on the sensing rod to prevent misoperation; Super bright red LED light provides a more convenient and immediate warning function for on-site personnel's material level monitoring; Wide AC/DC power input, wider application range; Suitable for material level monitoring of liquid, granular, and thick substances.