Gaskets, O-rings and seal kits maintain the environmental rating of detection and electrical housings. On a flame or gas detector rated for a hazardous location, the seal is what preserves that rating — a housing reassembled with a damaged O-ring is no longer explosion-proof or weather-tight.
Seals are specific to the housing and to the sensor head or cover they mate with, and dimensions are not interchangeable between series. Replace them whenever a housing is opened for service rather than reusing a compressed seal, and order by the equipment part number.

Det-Tronics
Det-Tronics 012820-001 20pcs O-Ring, Q9033 COLLAR
Sale price$126.10
Regular price$151.32
Not in stock - available on backorder - lead time on request
Det-Tronics
Det-Tronics 005964-001 CALIBRATION CUP WITH O-Ring
Sale price$342.55
Regular price$411.06
Not in stock - available on backorder - lead time on request
Apollo
Apollo 31523-857APO Deckhead Mounting Box Gasket Pack of 10
Sale price$42.85
Regular price$51.42
Not in stock - available on backorder - lead time on request
Kidde
Kidde SD-GSK Duct Detector Accessory Gasket Kit
Sale price$13.65
Regular price$16.38
118 units in stock
Silent Knight
Silent Knight PS-WPGSKT Weatherproof Gasket
Sale price$9.30
Regular price$11.16
75 units in stock