Michael A Cordonnier

6422066, Jul 23, 2002

Apr 6, 2001

09/807177

Michael J. Cordonnier - Beavercreek OH
H. Ping Wu - Beavercreek OH
Robert B. Spokane - Bellbrook OH
Jamie N. Lussier - Yellow Springs OH

Yellow Spring Optical Sensor Co. PLL - Yellow Springs OH

G01N 2164

73 5301, 73 191, 73 3105, 73 2331, 73 6148, 73 6447, 422 8205, 422 8208, 422 94

A sensor capsule to facilitate positioning of an analyte sensitive element such as a CO sensor at the end of a fiber optic probe, which discloses a dye layer defined by a dye well, fluorescent dye solution and apertures formed in a silicone sensor membrane. A TEFLONÂ covering membrane is positioned over the silicone membrane to retain the dye layer within the well, and perforated metal disc is positioned beneath the silicone membrane to provide support and resist swelling of the dye layer. The perforated metal disc, silicone membrane and TEFLONÂ membrane define a sandwich sensor structure which is positioned within an outer housing. An insert member is positioned over the sandwich sensor structure and is snap fit into outer housing to provide a sensor capsule which may be removeably positioned/replaced in association with a probe tip used for forming the fiber optic CO SENSOR.