The E2K-C25ME1 is a long-distance capacitive sensor with adjustable sensitivity. This CE marking DC 3-wire model (NPN) detects metallic and non-metallic objects such as glass, wood, paper, water, oil and plastic. It has a settable detection distance from 3 to 25 mm with multi-turn adjuster, and it will also detect liquid level inside non-metallic containers and will reliably detect foamy liquids in sight glass applications.