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| Supply Ability | 40000 Pieces per Month | 
| Packaging Details | paper,foam,carton | 
| Customized support | OEM | 
| Structure | flat and round | 
| Item | Sight glass | 
| Surface | Polished | 
| Transmission | over 90% | 
| Processing | grinding and polishing | 
| Application | Industrial and lighting | 
| OEM | available | 
| Brand Name | LONGWAY | 
| Model Number | LW1609201313 | 
| Certification | ISO9001 | 
| Place of Origin | Shanghai, China | 
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Product Specification
| Payment Terms | T/T,Western Union | Supply Ability | 40000 Pieces per Month | 
| Packaging Details | paper,foam,carton | Customized support | OEM | 
| Structure | flat and round | Item | Sight glass | 
| Surface | Polished | Transmission | over 90% | 
| Processing | grinding and polishing | Application | Industrial and lighting | 
| OEM | available | Brand Name | LONGWAY | 
| Model Number | LW1609201313 | Certification | ISO9001 | 
| Place of Origin | Shanghai, China | ||
| High Light | Level Gauges sight glass ,Tempered borosilicate glass ,borosilicate glass optical window | ||
1. Material Composition:
Borosilicate Glass: High-purity, low-thermal-expansion material (e.g., Schott B270 or Pyrex equivalent) ensuring chemical inertness and structural stability.
Double-Polished Surfaces: Precision grinding and polishing on both sides for exceptional optical clarity, minimal light scattering, and distortion-free visualization.
2. Key Properties:
Thermal Resistance: Withstands temperatures up to 450°C (continuous) and thermal shock differentials exceeding 150°C.
Mechanical Durability: Hardness of 6.5 Mohs and pressure resistance up to 10 bar (customizable for higher specs).
Chemical Inertness: Resists corrosion from acids, alkalis, and solvents (excluding HF).
Optical Performance: >92% light transmission with UV to IR compatibility (280nm–2.5μm).
3. Core Functions:
Precision Monitoring: Enables accurate visual inspection of fluid levels, colors, and phases in gauges and instruments.
Safety Barrier: Acts as a transparent seal for high-pressure or hazardous environments (e.g., steam boilers, chemical tanks).
Optical Interface: Facilitates laser or spectroscopic measurements in analytical instrumentation.
4. Applications:
Industrial Level Gauges: Used in boilers, reactors, and pipelines for exact liquid/interface monitoring.
Process Instrumentation: Integrated into flow meters, pressure vessels, and control systems.
Laboratory Equipment: Employed in autoclaves, environmental chambers, and precision sensors.
Energy & Pharma: Suitable for solar thermal systems, pharmaceutical tanks, and sterilizable viewports.
| Item | Glass disc, Glass wafer, Sight glass, Panel lens, Glass sheet | 
| Material | Optical glass, Qurartz glass,borosilicate glass, Float glass, borofloat | 
| Diameter Tolerance | +0/-0.2 mm | 
| Thickness Tolerance | +/-0.2 mm | 
| Processed | By Cutting,Grinding,Tempering, Polishing | 
| Working temperature | Resisting high temperature shock | 
| Surface Quality | 80/50,60/40,40/20 | 
| Material Quality | No scratches and air bubble | 
| Transmission | >90% for visible light | 
| Chamfer | 0.1-0.3 mm x 45 degree | 
| Surface Coating | Available | 
| Usage | Optics, Lighting system, industrial area. | 



Company Details
Business Type:
Manufacturer,Agent,Exporter,Trading Company,Seller 
Year Established:
2008 
Total Annual:
1000000-5000000
Employee Number:
30~100 
Ecer Certification:
Verified Supplier 
Introduction Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted partner for busines... Introduction Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted partner for busines...
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