Patent ID: 7781221

Claim:
A system configured to determine information related to one or more gaseous analytes in a body of gas, the system comprising: a luminescable medium in communication with the body of gas; one or more emitters configured to emit electromagnetic radiation onto the luminescable medium, wherein the emitted electromagnetic radiation causes luminescence in the luminescable medium; a photosensitive detector configured to receive electromagnetic radiation that is generated by luminescence of the luminescable medium, wherein the photosensitive detector generates one or more output signals in response to the received electromagnetic radiation, the one or more output signals indicating an intensity of the received electromagnetic radiation; and a processor adapted to receive the one or more output signals generated by the photosensitive detector and adapted to determine the information related to one or more gaseous analytes in the body of gas based on a phase difference between the emitted electromagnetic radiation and the received amplitude modulated electromagnetic radiation, wherein the processor is further adapted to determine a detector delay of the photosensitive detector in the generation of the one or more output signals and compensate the phase difference for the determined detector delay.