Patent ID: 6946852
Filing Date: 2005-09-20
Classification: G01N

Abstract:
1. A chemical concentration detecting system for determining a concentration of a first chemical component in a gas mixture, comprising: sensing means responsive to changes in the concentration of the first chemical component in the gas mixture, said sensing means including a capacitor having first and second conducting elements exposed to the gas mixture, wherein said gas mixture comprises a dielectric therebetween, said capacitor having an electrical property that varies according to the concentration of the first chemical component in the gas mixture; a memory for storing a set of data including (a) property values associated with the electrical property and (b) concentration values corresponding with said property values that are indicative of the relative concentration of the first chemical component in the gas mixture; and processing means receiving data from the sensing means and determining the relative concentration of the first chemical component in the gas mixture by accessing the set of data stored in the memory.