Double-Polished Borosilicate Sight Glass for Precision Level Gauges and Instrumentation

Brand Name:LONGWAY
Certification:ISO9001
Model Number:LW1609201313
Minimum Order Quantity:300 pieces
Payment Terms:T/T,Western Union
Place of Origin:Shanghai, China
Contact Now

Add to Cart

Verified Supplier
Location: Shanghai Shanghai China
Address: Rm. 2111, Bldg. A, Tomson Center, No. 188, Zhangyang Rd., Shanghai, China
Supplier`s last login times: within 1 hours
Product Details Company Profile
Product Details

Double-Polished Borosilicate Sight Glass for Precision Level Gauges and Instrumentation


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.


ItemGlass disc, Glass wafer, Sight glass, Panel lens, Glass sheet
MaterialOptical glass, Qurartz glass,borosilicate glass, Float glass, borofloat
Diameter Tolerance+0/-0.2 mm
Thickness Tolerance+/-0.2 mm
ProcessedBy Cutting,Grinding,Tempering, Polishing
Working temperatureResisting high temperature shock
Surface Quality80/50,60/40,40/20
Material QualityNo scratches and air bubble
Transmission>90% for visible light
Chamfer0.1-0.3 mm x 45 degree
Surface CoatingAvailable
UsageOptics, Lighting system, industrial area.




China Double-Polished Borosilicate Sight Glass for Precision Level Gauges and Instrumentation supplier

Double-Polished Borosilicate Sight Glass for Precision Level Gauges and Instrumentation

Inquiry Cart 0