Proximity switch for detecting approach of workpieces in monitoring area, has gas-permeable housing section that comprises sintering material or differs from its immediate surroundings only through microscopic holes

摘要

The proximity switch has a sensor (1) and an electronic circuit (2) in a housing (3), where the housing has a gas-permeable housing section for venting the interior and as a barrier against the discharge of viscous sealing compound (4). The gas-permeable housing section comprises a sintering material or differs from its immediate surroundings only through microscopic holes. The sealing compound comprises foam made of polyurethane.