Patent ID: 8632666
Filing Date: 2014-01-21
Classification: G01N

Abstract:
1. An explosion-proof sensor comprising: one or more metal pins; a sensor element connected in an electrically conductive manner to said one or more metal pins; a sensor housing with a gas detection opening closed by a gas permeable portion and with a lead connection opening, the housing defining a gas detection space; a glass seal forming a sealing surface with said pins passing through said sealing surface for sealing said one or more metal pins, said glass seal comprising a ring-shaped metallic bottom plate and a weld seam providing a gas tight connection of the ring-shaped metallic bottom plate to an interior wall surface of the sensor housing, the ring-shaped metallic bottom plate surrounding a one-piece glass insert and cooperating with said one-piece glass insert to form the sealing surface, the glass insert consisting of glass through which the one or more metal pins pass, the sealing surface extending fully across the lead connection opening and sealing the gas detection space at the lead connection opening; and a bending-resistant casting compound supporting the glass seal at least on one side thereof with said bending-resistant casting compound extending fully across the sealing surface, said glass seal and said bending-resistant casting compound fully closing said lead connection opening and said sensor housing, with said gas detection opening closed by said gas permeable portion and said glass seal and said bending-resistant casting compound fully closing said lead connection opening, said sensor housing fully enclosing said sensor element on all sides.