Patent ID: 6807843
Filing Date: 2004-10-26
Classification: G01N

Abstract:
An apparatus for sensing a proportion of a gas in a gas mixture comprising:a sampling element slidably engaged with a sensor element; said sensor element having a sensing chamber therein with an inlet passage and an outlet passage formed in said sensor element wherein said inlet passage and said outlet passage in communication with said sensing chamber and externally to said sensor element; a first detector positioned in said sensing chamber with a first pair of external contacts passing through said sensor element and terminating externally thereto; said sensor element having a reference chamber therein with a second detector positioned therein and a second pair of external contacts passing through said sensor element terminating externally thereto; and said sampling element having a sample chamber therein with said sensor element forming a portion of said sample chamber, said inlet passage having an inlet open end positioned in said sample chamber, and a gas inlet port in communication with said sample chamber and eternally to said sampling element.