Lumistar Special Glass Technology Co., Ltd.
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The DIN7080 sight glass with center bore is a standard industrial sight window disc used for level gauges and inspection ports.
It is available in borosilicate glass (high-temperature, chemical-resistant), tempered soda-lime, and sapphire on request.
We supply DIN7080-certified discs, test reports, and custom sizes for OEMs and plant replacements.
DIN7081 reflex level gauge glass for clear, reliable level indication. Reflex sight glass discs and tubes for level gauge glass housings. Datasheet, COA and custom sizes available.
DIN7081 transparent level gauge glass for liquid level gauges. High-clarity borosilicate sight glass discs and tubes. Datasheet, sizing matrix and COA available.
DIN8902 soda-lime tempered glass provides an economical, safety-tempered viewing window for general industrial equipment, lighting front panels and instrument displays. Available in standard stocked sizes or CNC cut to custom diameters and thicknesses.
DN 100 vacuum sight glass for compact high-vacuum systems. Available in borosilicate, fused silica & sapphire. Quick-fit DN/KF flange with optional AR coatings.
DN 125 vacuum sight glass for compact high-vacuum systems. Available in borosilicate, fused silica & sapphire. Quick-fit DN/KF flange with optional AR coatings.
DN15 vacuum sight glass for compact high-vacuum systems. Available in borosilicate, fused silica & sapphire. Quick-fit DN/KF flange with optional AR coatings.
DN 150 vacuum sight glass for compact high-vacuum systems. Available in borosilicate, fused silica & sapphire. Quick-fit DN/KF flange with optional AR coatings.
DN 20 vacuum sight glass for compact high-vacuum systems. Available in borosilicate, fused silica & sapphire. Quick-fit DN/KF flange with optional AR coatings.
DN 200 vacuum sight glass for compact high-vacuum systems. Available in borosilicate, fused silica & sapphire. Quick-fit DN/KF flange with optional AR coatings.
The DN25 vacuum sight glass (DN-25 viewport) is an ultra-compact vacuum optical port designed for small chambers, sample holders and tight-space process equipment. It provides repeatable, reliable optical access for inspection, alignment, laser entry and basic spectroscopy without compromising vacuum integrity.
Constructed with a stainless-steel flange and a vacuum-grade window (borosilicate / fused silica / sapphire), the DN20 viewport is ideal where space is limited but visual or optical access is required.
DN 32 vacuum sight glass for compact high-vacuum systems. Available in borosilicate, fused silica & sapphire. Quick-fit DN/KF flange with optional AR coatings.