The M12 series compact capacitive sensors detect nonmetallic objects or materials as well as levels of liquids and solids. With improved electromagnetic compatibility (EMC) and sensing faces composed of polyetheretherketone (PEEK), they provide excellent chemical resistance. They are available with an IO-Link interface or with a conventional normally open or normally closed final stage, each with a push-pull function. These capacitive sensors equally good at detecting solids or material or liquids such as granulates, sugar, oil and aqueous media through a nonmetal wall, such as packaging, glass or plastic, with a maximum thickness of 4 mm.