Smelter/Furnace Safety

Oswal Peep Hole Cobalt Blue Glass

CLI ApprovedIS 5983 / 1980

Cobalt blue peep hole glass for furnace and kiln observation windows. Blocks harmful infrared and UV while providing a clear view into high-temperature chambers.

OSWAL Cobalt Blue Peep Hole Glass is a precision optical glass component designed for installation in fixed or portable furnace observation ports. It enables safe, distortion-free monitoring of high-temperature processes by filtering intense infrared and UV radiation from furnace interiors, molten metal, and smelting chambers.

Key Features

Cobalt blue optical glass — selectively filters excessive infrared and UV radiation from furnace openings
Glass Thickness: 3 mm (custom thicknesses available on request)
Precision-ground edges for safe handling and secure mounting in peep hole frames
Provides clear, optical-quality view of furnace interiors without harmful glare
Superior heat resistance for continuous high-temperature exposure

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Thickness

3 mm (standard) — other thicknesses available on request

Weight

Varies by dimension

Optical

Class 1