DIY Non-Contact Low-Cost AC Voltage Detector

Non-contact level detection sensors, as the name implies, detect the status change of the level without contact with the liquid. Capacitive level sensor is a non-contact type, and it is equipped with a precision touch MCU, which determines whether the water tank is short of water by sensing the difference in capacitance value when there is water and no water. Capacitive liquid level sensor is more suitable for normal temperature environment, installation is also very convenient and simple, the sensor close to the outer wall of the water tank container, you can detect without debugging. Because it is a capacitive induction principle, there can be no metal or magnetic field interference within 2cm around the sensor, which will cause the sensor to not work properly. Capacitive liquid level sensor has small volume, sensitive response and high precision, and can realize the functions of water shortage alarm and full water power outage.