Patent ID: 7614308

Claim:
A diaphragm pressure measuring cell arrangement comprising: a ceramic diaphragm pressure measuring cell ( 17 ) comprising a housing body ( 2 ) made of material selected from the group consisting of: Al 2 O 3 ceramic and sapphire material, the housing body having a front side and a back side; a diaphragm ( 6 ) made of material selected from the group consisting of: Al 2 O 3 ceramic and sapphire material; arranged proximate to said housing body, said diaphragm being substantially planar and having a peripheral edge, the peripheral edge of said diaphragm being joined by a first edge seal ( 8 ) to said housing body to form a reference vacuum chamber ( 5 ) between said housing body and said diaphragm, said diaphragm having first and second opposing surfaces, the first surface of said diaphragm facing said housing body and said housing body having a surface facing said diaphragm, the second surface of the diaphragm being an outer surface exposed by measuring port means ( 40 ) for connecting the ceramic diaphragm measuring cell to a medium to be measured, and at least in a central area of the housing body, means for detecting deflection of the diaphragm to produce a pressure signal; a ceramic supporting body ( 1 ) attached to the back side of the housing body ( 2 ) by sealing glass ( 8 ) including a surface area overhanging and surrounding the housing body and forming a first sealing surface, said ceramic supporting body having a back side; a tubular sensor casing ( 19 ) for receiving said ceramic diaphragm pressure measuring cell and for holding and mounted said ceramic support body, said tubular sensor casing including an inside second surrounding sealing surface corresponding to the first sealing surface; a metal ring seal ( 18 ) between said first and second sealing surfaces; and pressing means ( 20 ) arranged on the back side of the ceramic supporting body for pressed said first and second sealing surfaces together.