Patent ID: 6863508

Claim:
A measuring gas pump comprising a pump housing, a pump chamber located in the pump housing that is sealed off by a working membrane, the membrane being driven by a crank drive connected to one of a connecting rod and a displacement mechanism, wherein a heating device is provided in a pump head of the pump housing, and heat insulation is provided that encloses at least the pump head, the heat insulation comprising an insulating housing ( 13 ) having an inner wall ( 15 ) that is spaced apart from the pump head ( 8 ) to form an insulating gas layer ( 14 ), and the insulating housing includes a heat radiation reflecting reflection layer ( 17 ), wherein the insulating housing ( 13 ) is a sandwich construction, having a metal hood on an inside thereof spaced apart from the pump head ( 6 ), the metal hood being made of stainless steel, followed outward by a heat-resistant thermal insulation layer ( 16 ), and then by an external thermal insulation layer made of plastic.