Patent ID: 11927580
Assignee: MSA TECHNOLOGY, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A gas sensor device to detect an analyte gas in an ambient environment, comprising:
a housing comprising an inner chamber and a port;
a porous member in operative connection with the port to separate the inner chamber from the ambient environment;
at least one sensor responsive to a target gas positioned within the inner chamber;
a source of pressure change in fluid connection with the inner chamber, the source of pressure change comprising a moveable element which is movable to displace a volume within the inner chamber;
a drive system in operative connection with the moveable element and wherein the volume of the inner chamber is displaced by displacement of the moveable element via the drive system;
a pressure sensor responsive to pressure change within the inner chamber; and
circuitry in operative connection with the moveable element via the drive system to move the moveable element to create a predetermined volume displacement of the inner chamber to emit the one or more pressure waves, the circuitry further being in operative connection with the pressure sensor to determine if at least a partial blockage is present in the porous member based upon a response of the pressure sensor.