Patent ID: 8576400
Filing Date: 2013-11-05
Classification: B33Y,G01N

Abstract:
1. A method of monitoring an analyte in an atmosphere, comprising: a) exposing at least one sensing element to an atmosphere potentially containing an analyte for a period of time; b) directing light in a first wavelength range onto the at least one sensing element and obtaining a first signal that is representative of an amount of light in the first wavelength range reflected from the at least one sensing element; c) directing light in a second wavelength range onto the at least one sensing element and obtaining a second signal that is representative of the amount of light in the second wavelength range reflected from the at least one sensing element; d) comparing the first and second signals to provide a compared signal; and, e) correlating the compared signal to a predetermined response curve and thereby obtaining a concentration value that is associated with the concentration of the analyte in the monitored atmosphere.