The vibration probe of the vibrating rod material level switch adopts a unique double-tube design with internal and external nesting settings. The resonant frequency of the inner and outer vibration tubes is adjusted to be completely consistent, making the product extremely high detection sensitivity and reliability. , the lowest measured density can reach 0.02g/cm3. The product uses piezoelectric devices to drive and detect vibration, so that the inner and outer tubes produce a buzzing sound at exactly the same resonant frequency. When the vibrating rod comes into contact with the material to be measured, the resonant frequency of the outer tube in contact with the material changes, thereby destroying the ringing conditions of the inner and outer tubes, causing the amplitude of the vibration probe to significantly decrease, and the output signal amplitude of the piezoelectric detection device also decreases. decreases, the signal change is detected and analyzed by the intelligent circuit and a switching signal is output. Shenzhen Jiwei Automation Technology Co., Ltd. is a high-tech enterprise specializing in the research and development, production, sales and service of position measurement and control instruments.