US 12,247,994 B2
Gas densimeter
Philipp Sennert, Dorfprozelten (DE); and Matthias Sausner, Weiterstadt (DE)
Assigned to Wika Alexander Wiegand SE & Co. KG, Klingenberg (DE)
Filed by WIKA Alexander Wiegand SE & Co. KG, Klingenberg/Main (DE)
Filed on Nov. 30, 2023, as Appl. No. 18/524,178.
Application 18/524,178 is a division of application No. 16/585,317, filed on Sep. 27, 2019, granted, now 11,867,712.
Claims priority of application No. 10 2018 009 793.6 (DE), filed on Dec. 18, 2018.
Prior Publication US 2024/0094105 A1, Mar. 21, 2024
Int. Cl. G01N 9/32 (2006.01); G01N 9/26 (2006.01)
CPC G01N 9/32 (2013.01) [G01N 9/266 (2013.01); G01N 2291/02818 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A gas densimeter configured for monitoring a pressure or density of a gas in a gas chamber, the gas densimeter comprising:
a housing having a first housing chamber and a measuring chamber;
a first coupling, via which the measuring chamber is connectable to the gas chamber, the measuring chamber having a gas-permeable connection to the gas chamber via the first coupling;
a reference bellows that is connected directly or indirectly to a transmission element, the reference bellows forming a reference chamber filled with a constant amount of a reference gas;
at least one transmitting and/or monitoring unit that is operatively connected directly or indirectly to the transmission element; and
a surface section covering the reference bellows and that is reachable at least partially within the first housing chamber or measuring chamber, the surface section being a measuring surface for the gas from the gas chamber,
wherein the surface section covering the reference bellows has an effective measuring surface, the effective measuring surface being smaller by 2% to 80% than a cross-sectional area of the reference bellows or the surface section covering the reference bellows.