Patent ID: 11867712
Assignee: WIKA ALEXANDER WIEGAND SE & CO. KG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A gas densimeter for monitoring a pressure or density of a gas in a gas chamber, the gas densimeter comprising:
a housing that comprises at least one first housing chamber, the at least one first housing chamber comprises a measuring chamber;
at least one first coupling via which the housing is connectable to the gas chamber;
at least one reference bellows being connected directly or indirectly at a first end section to a first inner wall section of the at least one first housing chamber or the measuring chamber;
at least one separator connected directly or indirectly to a second end section of the at least one reference bellows or is formed by the second end section;
at least one transmission element connected directly or indirectly to the at least one separator; and
at least one transmitting and/or monitoring unit operatively connected directly or indirectly to the at least one transmission element,
wherein the measuring chamber has a gas-permeable connection to the gas chamber via the at least one first coupling,
wherein the at least one reference bellows forms a reference chamber filled with a constant amount of a reference gas,
wherein the reference chamber is disposed at least partially within the at least one first housing chamber and is separated from the measuring chamber in a gas-impermeable manner,
wherein the housing comprises:
a filling opening; and
a closure,

wherein there is a gas-permeable access to the reference chamber via the filling opening and the filling opening is sealingly closed by the closure, the closure comprising:
a screw with a sealing washer;
a pressed-in rivet;
a ball or a ball with a spring; or
a dowel pin or a dowel pin that is sealingly welded in the filling opening.