Patent ID: 6672129
Filing Date: 2004-01-06
Classification: A61M,B01F,F24F

Abstract:
A method to correct the measurement of an electronic chemical sensor used for measuring concentration of odors in air, comprising:providing an electronic chemical sensor capable of generating a signal responsive to an amount of an odor producing material; providing a support structure having a target medium, wherein the target medium comprises a heated target surface; providing a printhead having at least one fluid ejection device having an orifice and being capable of ejecting microdroplets of calibration fluid at a controlled known rate; ejecting a plurality of successive microdroplets of the calibration fluid on to the heated target surface thereby volatilizing the microdroplets to generate a calibration gas of a known first concentration; exposing the electronic chemical sensor to the calibration gas of the first concentration; establishing a baseline response of the electronic chemical sensor to the calibration gas of the first concentration; exposing the electronic chemical sensor to air containing an unknown concentration of odor producing material and establishing a value for the unknown concentration; and adjusting the value for the unknown concentration by reference to the baseline response to the calibration gas to produce a corrected result.