Factory & Capacity
Our Factory — Built for Precision
Located in Hengshui, China, our manufacturing base spans over 8,000 square meters and houses specialized workshops for cutting, grinding, tempering, and optical inspection. We don’t just resell — we control every step from raw glass sheet to final packing.
- 30+ skilled technicians and engineers
- 10 dedicated production lines for reflex, circular, and tubular sight glasses
- In-house CNC processing, edging, and thermal tempering
- Climate-controlled raw material storage for borosilicate and quartz glass
Production Capacity by Product Series
Reflex Level Gauge Glass
Max length: up to 400mm
Annual output: 500,000+ pieces
Materials: Borosilicate, quartz, soda-lime
Compliant with DIN 7081 / JIS standards
Available with reflex grooves 90° or 120°
Circular Sight Glass
Diameter range: 15mm – 300mm
Thickness: 2mm – 40mm
Annual capacity: 2 million pieces
Tempered, annealed, or laminated options
High clarity for level gauges, flow indicators
Tubular Sight Glass
Outer diameter: 8mm – 80mm
Wall thickness: 1mm – 8mm
Length up to 1,500mm
Annual output: 300,000+ meters
Borosilicate 3.3, quartz, and high-pressure tubes
Hengshui Aohong
Inspection & Testing You Can Trust
Quality is non-negotiable for industrial observation glass. Our in-house lab is equipped to perform a full suite of destructive and non-destructive tests, ensuring every batch meets international standards before shipment.
Pressure & Thermal Shock Test
Simulates real-world high temp/pressure conditions
Optical Clarity Analysis
Spectrophotometer inspection for light transmission
Dimensional Accuracy
Laser measurement ±0.02mm tolerance
Surface Quality Inspection
Automated scanning for scratches, bubbles, inclusions
Mechanical Strength
Bending and impact resistance verification
Certificate of Compliance
Material certs (3.1) available with every order
Why Source Sight Glass Directly from Our Factory
True Factory
No middleman — you communicate directly with our engineering and sales team.
Fast Lead Times
Standard sizes shipped in 7-15 days; custom orders typically ready in 3-4 weeks.
Custom OEM/ODM
Non-standard dimensions, special coatings, edge profiles — all possible.
Certifications
ISO 9001, factory audit reports, and material traceability documentation provided.
Ready to Discuss Your Sight Glass Requirements?
Whether you need a standard reflex gauge glass or a fully customized tubular solution, our factory team is prepared to support your project with samples, drawings, and a competitive quotation.
📧 info@hsahglass.com | 🌐 hsahglass.com
