Patent ID: 8245670

Claim:
An apparatus for housing a sensor used in monitoring a combustion unit comprising: one or more sensors; a cooling medium selected from the group consisting of air and inert gases; a cooling medium supply device having a cool exit and a hot exhaust; a high temperature glass wafer; a sweep; and two or more chambers; said first chamber housing said sensor and being in communication with the cool exit of said cooling medium supply device; said second chamber housing said first chamber and being in communication with said first chamber; said glass wafer having a first and second surface and being located at an end of said second chamber, the first surface being in communication with an interior of said second chamber, the second surface being sealed from the interior of said second chamber; and said sweep being in communication with the hot exhaust of said cooling medium supply device and oriented relative to said glass wafer; whereby said a cool exit stream passes annular about said first and second chambers and said sweep directs a hot exhaust stream across the second surface of said glass wafer.