Hard Viewing Surface
Mohs 9 hardness helps resist scratching from routine handling and airborne particles, subject to cleaning method and edge protection.
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High Hardness Sapphire Observation Window for Furnace Chamber
| Share | |
|---|---|
| Categories | Sapphire Optical Lenses |
| Brand | FELIX GLASS optical glass Manufacturing base |
| Model | FG-SAPP-WIN-FURN-001 |
| Raw Material | Single Crystal Sapphire (Al₂O₃) |
| Core Performance | Mohs 9 High Hardness, Long-term 1800℃ Heat Resistance |
| Available Shapes | Rectangle / Round / Oval / Curved / Drilled Custom Sight Glass |
| Surface Treatment | Double-sided Optical Polishing, Custom Edge Machining |
| Main Application | Industrial Furnace, Metallurgy, Boiler, Furnace Camera Monitoring |
| Custom Service | OEM ODM Custom Size, Drilling / Sinking Hole Processing |
| FOB port | SHENGZHEN SHANGHAI GUANGZHOU |
| Terms of Payment | L/C, D/A, D/P, T/T |
| Download |    |
Detail Information
High Hardness Sapphire Observation Window for Furnace Chamber Felix Glass Co., Limited supplies single-crystal sapphire observation windows for furnace cameras, optical inspection systems and process-viewing assemblies. Sapphire combines a hard polished surface with optical transmission across selected ultraviolet, visible and near-infrared bands. Sapphire may suit elevated-temperature viewing when the complete window, coating, seal and mount are designed for the operating cycle. Material thickness and optional coating are selected around the camera, detector or inspection wavelength rather than a universal transmission claim. Curved configurations and all dimensional ranges require feasibility confirmation. Explore related sapphire optical windows for additional geometry references. Viewing ports for ovens, vacuum sintering furnaces and annealing equipment. Observation positions in reactors where the window material is compatible with the stated chemicals and temperature. Monitoring of smelting and molten-metal processes through a protected optical path. High-temperature microscopes, cameras and optical detection equipment. Flange sight-glass and pressure-vessel viewing assemblies designed around the required pressure rating. Observation of high-temperature metal forming chambers and related process equipment. Browse the product catalog to compare other optical materials and component formats. Document temperature cycle, atmosphere, pressure, deposits and cleaning exposure. Match sapphire thickness and coating to the source, detector and incidence angle. Allow for thermal expansion, edge loading, seal compression and replacement access. Agree on dimensions, surface condition, optical tests and documentation before production. Lead time is confirmed after material, geometry, coating, quantity and inspection requirements are reviewed. Learn more about Felix Glass Co., Limited. Send the drawing, dimensions, working and peak temperatures, wavelength, chamber atmosphere, pressure, mounting method, coating target, inspection needs and quantity. The engineering team will review feasibility and identify any missing information before quotation. The original listing states a long-term target of 1800°C, but this is not a universal assembly rating. Size, thermal gradients, pressure, mount, seal and coating must be evaluated for the actual furnace. Drilling, counterbore-style recesses, chamfers and custom edges can be reviewed from a dimensioned drawing. Feasibility depends on feature size, location, thickness and edge distance. No. The decision depends on wavelength, angle of incidence, temperature, atmosphere, cleaning method and allowable reflection. Provide the pressure differential, temperature cycle, clear aperture, unsupported span, mounting and seal design. The complete assembly rating is not determined by the sapphire plate alone.
Furnace viewing conditions
Product Introduction
Single-crystal Al₂O₃ Observation and sensing Drawing-based supply
View Sapphire Optical Lenses
Direct answer
Why Use Sapphire for a Furnace Observation Window?
Thermal Application Fit
Defined Optical Band
Original specification topic retained
Customizable Specifications
Material Single-crystal sapphire (Al₂O₃) Shapes Rectangular, round, oval, curved, drilled, long-strip and other drawing-defined forms Original size range 5–500 mm with 0.5–50 mm thickness, subject to geometry and process review Machining options Drilling, counterbore or recessed-hole features, chamfering and custom edge machining Surface treatment Double-side optical polishing with project-defined flatness, parallelism and surface quality Optional coating Anti-reflection coating evaluated for wavelength, angle, temperature and cleaning conditions
RFQ definition
Optical and Mechanical Inputs to Confirm
Clear aperture and outside dimensionsWindow thickness and edge profile
Working wavelength and detector typeAngle of incidence and coating target
Operating and peak temperaturesHeating and cooling ramp rate
Pressure differential and chamber atmosphereMounting, seal and cleaning method
Surface quality and flatness criteriaQuantity and inspection documentation
Desire
Wide Application Fields
Industrial Furnaces
Chemical Processing
Metallurgy
Optical Inspection
Boilers and Vessels
Additive Manufacturing
Integration planning
Furnace Integration and Risk Review
Define the Environment
Check the Optical Path
Review the Mount
Set Acceptance Criteria
Original supplier topic retained
Our Advantages
Action
Send Your Drawing
Inquiry Guide
Buyer questions
Sapphire Furnace Window FAQ
Can the window operate continuously at 1800°C?
Can drilled or recessed features be machined?
Is anti-reflection coating always recommended?
What should be specified for a pressure vessel?
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Custom Precision Optical & Glass Components Manufacturer – Felix Glass Co., Limited.
We supply Industrial Glass, Sapphire Optics, Optical Lenses/Prisms/Filters, Infrared IR Optics, Functional & Display Glass, N-BK7/H-K9L Optical Glass, supporting OEM mass production and laboratory custom prototypes. Flexible MOQ & free sample service available. Fill in the form to download full datasheets and get factory wholesale price within 24 hours.
CONTACT US NOW FOR A QUOTE
Send an inquiry now—we will respond promptly within 1–24 hours and provide our best formal quote within 1–2 days! Let’s start a mutually beneficial partnership today...
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Learn more from our FAQ
- What is your MOQ for custom optical glass and display glass parts?
Felix Glass offers highly flexible MOQ to support client projects, including prototype testing, small batch trial orders and large-volume mass production. All products can be fully customized according to your drawings, tolerances and application standards. Send us your specs to get an accurate price quote within 24 hours.
- Can I get free glass samples for testing before bulk order?
Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.
- What is the production lead time for custom optical glass components?
What is the production lead time for custom optical glass components?
Answer: The lead time for standard samples is 3–7 business days, while mass production takes 15–25 business days, depending on product complexity and order volume. We provide reliable, rapid delivery for orders serving the industrial, medical, automotive, and aerospace sectors. Please submit your project details to receive an accurate delivery schedule.
- Are your optical glass products ISO, CE and RoHS certified?
All FELIX GLASS precision optical glass components comply with ISO quality system standards, as well as CE and RoHS requirements. We provide comprehensive test reports, material certificates, and inspection documentation for customer review. Please feel free to request full certification details and a formal quotation today.
- Do you offer one-stop custom optical glass processing services?
Yes. We provide a full range of in-house processing services, including CNC machining, precision grinding, optical polishing, vacuum coating (AR, AF, AG, IR), tempering, and screen printing. Every step—from raw material to finished product—is carried out within our own facility. Please let us know your requirements, and we will provide you with the most cost-effective solution.
CONTACT US NOW FOR A QUOTE
Send an inquiry now—we will respond promptly within 1–24 hours and provide our best formal quote within 1–2 days! Let’s start a mutually beneficial partnership today...
- Name
- *Title
- *Content
