ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,228,551, issued on Feb. 18, was assigned to SENSIRION AG (Stafa, Switzerland).
"Photoacoustic gas sensor device" was invented by Lukas Burgi (Stafa, Switzerland), Thomas Uehlinger (Stafa, Switzerland) and Werner Hunziker (Zurich, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A photoacoustic gas sensor device for determining a value indicative of a presence or a concentration of a component in a gas comprises a measurement cell enclosing a measurement volume and a gas permeable area in the measurement cell for a gas to enter the measurement volume. An electromagnetic radiation source is arranged to emit electromagnetic radiation into the mea...