High Pressure Resistant Aluminosilicate Reflex Level Gauge Glass Sight Glass

Aluminosilicate (Alkali-Resistant) Glass Level Gauge

Aluminosilicate (alkali-resistant) glass level gauges are engineered for demanding process applications where ordinary soda-lime glass will fail. The higher alumina content yields excellent resistance to strong alkaline and corrosive chemicals, lower coefficient of thermal expansion, and improved mechanical strength. Our level gauge products are available in multiple formats — direct sight tubes, flanged gauges, reflex/transparent assemblies and laminated safety windows — and can be supplied with precision drilled holes, polished edges, and optional laminates or coatings.

Key benefits

• Outstanding resistance to alkalis and many aggressive chemicals

• Low coefficient of thermal expansion → good thermal-shock resistance

• High dimensional stability and mechanical strength

• Precision machining for accurate, leak-free mounting in gauge assemblies

• Safety options (lamination/retention) reduce risk of falling fragments on breakage

• Suitable for direct observation, instrumentation windows and retrofit replacements

Typical applications

• Process level sight gauges on tanks, vessels and reactors

• Vacuum pans, feed manifolds and entrainment observation ports

• Chemical and petrochemical process equipment exposed to caustic media

• Laboratory apparatus, pilot plants and research vessels

• High-temperature or thermal-shock prone environments

Packing & Delivery

Packing: Each piece of glass is individually packed and  in cartons

MOQ: 10 pieces. 

Delivery time: 7 days. 

Sample policy: Samples available. 

Why Choose Us

Lumistar Special Glass Technology Co., Ltd. is a national high-tech enterprise mainly engaged in the research and development, design, manufacturing, and processing of various types of ultra-high pressure glass windows and safety protection equipment, including high temperature and high pressure glass, ultra-high pressure glass tubes, ultra-high pressure glass mirrors, ultra-low temperature glass, oil well ultra-high pressure glass blasting discs, sapphire glass, microcrystalline ceramic glass, pipeline mirrors, pressure vessel mirrors, high vacuum observation windows, ultra-high pressure alkali resistant mica glass mirrors, high pressure level gauge aluminum silicon glass, explosion-proof spotlights, bulletproof and explosion-proof glass, sintered mirrors, bulletproof security posts, and bulletproof transparent materials.

• Safety-first materials & testing — for reliable visual windows.

• Engineering-ready — CAD, datasheets, and clear dimensions provided. 

•  Reduce downtime — correct specs and fast technical support. 

•  Honest pricing & practical MOQ — minimize your procurement risk. 

•  Responsible packing & on-time delivery — parts arrive ready to install.