Inductive proximity switch used as contactless operating electronic switching device used in e.g. automation field, has sealant made of glass which completely surrounds coil and associated bobbin or coil core

摘要

The inductive proximity switch comprises a bobbin or coil core (1), a coil (3) for generating magnetic alternating field, a sealant (8) made of glass and an electronic circuit provided in a cylindrical housing (5). The sealant completely surrounds the coil and associated bobbin or coil core. The coil is covered with glass layer, glass ceramic layer or ceramic layer and electrical insulation oxide layer.