The material level controller circuit is simple and easy to manufacture. Any conductive liquid or metal powder, metal particles and other materials can be used for measurement and control. Hydraulic Servo Systems,Servo System Harness,Hydraulic Bldc Motor,Servo Motor Pump Zhejiang Synmot Electrical Technology Co., Ltd , https://www.synmot-electrical.com
The circuit is shown in the figure, 555 is used as a comparator, and A is a probe for detecting the level. The LED is used to indicate that the relay J performs control and can be used to cut off the supply path electrical device. The power supply can be powered by a 6V battery or AC. J does not pick up the power consumption of the power is less than 5mA.