Our standard tempered square sight glass is a high-transparency viewing plate widely used for boilers, pipelines, furnaces and pressure industrial equipment. Crafted from light green clear tempered glass with 83% light transmittance, it can withstand continuous working temperature up to 300°C. Every square sight window comes with smooth burr-free polished edges, outstanding explosion-proof performance and strong impact resistance, effectively avoiding glass breakage under high-temperature operating conditions. We stock full regular sizes ranging from 50–400mm with thickness options of 3–30mm, supporting bulk orders and fast delivery for industrial buyers across chemical, steel, pharmaceutical, refrigeration and shipbuilding industries. Custom non-standard processing is available as an extra service if standard specifications cannot meet your special equipment requirements. All glass sheets are professionally tempered to ensure low optical distortion and clear sight of internal equipment status.
