Liquid Level Sensor 50cm — Pipeline Non-Contact Water Level Switch, NPN Normally Open, Easy to Operate

50cm non-contact pipeline liquid level switch using a capacitive principle to provide precise, dependable level detection. Output type: NPN, Normally Open. Designed to mount on pipe diameters from 4mm to 25mm, it supports a variety of installation scenarios. The sensor detects liquids through the pipe wall, so no direct contact with the fluid is required, improving compatibility with different liquids. Housed in fireproof ABS material for durability and resistance to acid and alkali corrosion. Includes built-in short circuit and overload protection to guard against electrical damage, making it simple and reliable to operate for liquid monitoring applications.