Many water purifier clean and wastewater tanks are made of non-metallic materials such as ABS, PP, or PE. How can we detect the water level inside these containers without drilling holes or contacting the water? The answer lies in Capacitive Non-contact Detection Technology.
When the sensor from Shenzhen Xingkechuang Technology operates, its probe and the tank wall form capacitor plates, with the air or water inside acting as the dielectric medium. Since the dielectric constant of water is much higher than that of air and plastic, when the water level rises to cover the probe area, the equivalent capacitance value changes significantly. The high-precision ASIC chip inside the sensor captures this change to output a switch signal. This technology can penetrate non-metallic walls of a certain thickness (e.g., 1-20mm, adjustable based on media), allowing for more flexible water purifier tank designs without complex internal structures—simply adhere the sensor to the outer wall.
