Acoustic gas monitor
AssigneeMaquet Critical Care AB
InventorErik Cardelius
Life of this patent
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Abstract
An acoustic gas monitor has a measurement chamber into which a reference gas of known composition is received and is provided with a wall section for the selective transmission of a gaseous substance to be monitored between the reference gas internal the chamber and a host gas externally of the chamber. An acoustic velocity meter is arranged to supply to an analyzer a signal indicative of an acoustic velocity within the mixture of reference gas and gaseous substance in the chamber. The analyzer being programmed to derive, from the velocity measurement made within the single chamber, information relating to the level of the gaseous substance to be monitored.
Claims7
An acoustic gas monitor comprising:
- a measurement chamber for receiving a gaseous substance to be monitored;
- an acoustic velocity meter acoustically coupled to an interior of said measurement chamber for determining an acoustic velocity, in said interior of said chamber, and generating an output signal indicative of said acoustic velocity;
- and
- said measurement chamber having a wall section for selective transmission of said gaseous substance between a reference gas in said interior of said measurement chamber and a host gas at an exterior of said chamber.
Dependencies are inferred from the claim text.