Abstract: A mass spectrometer comprising: a vacuum housing comprising a first vacuum chamber having a first gas exhaust port; a gas pump (1700) having a first gas inlet port connected to the first gas exhaust port (H1) by a first gas conduit for evacuating the first vacuum chamber, and a first apertured cover (2010) arranged over the first gas exhaust port (H1) or first gas inlet port, or in the first gas conduit therebetween.

Abstract: An hermetic glass-metal seal, for an electrochemical cell, having a metallic central feedthrough as a terminal thereof which is chemically incompatible with the components of said cell. The feedthrough is connected within said cell to a second compatible metallic element for electrical connection to an electrode within said cell. An inert polymeric material is sealed to the glass or outer metal member of the glass-metal seal and is sealed to and encloses the metallic feedthrough within said cell and the connection area between the feedthrough and said second metallic element.

Abstract: A method for mass producing silicon type pressure transducers and transducers resultant therefrom are disclosed. In the method, the major components of a plurality of transducers are simultaneously joined together by a field-assisted bonding technique which allows the components to be made of materials having an approximate match in coefficients of thermal expansion and therefore imparts improved performance characteristics to the individual transducers during operation. This method of mass production of transducers reduces the amount of operational steps and significantly reduces the amount of time and labor required for manufacture.