Product type: Optical Glass. Application: Sight glass, level gauge, boiler/furnace observa. Model: HT-OPG. Function: Optical Function, Thermal Function, Mechanics and Mechanical Function.
Overview
The Borosilicate 3.3 Optical Sight Windows Boiler Furnace Observation Panels Heat Resistant 450C Thermal Shock Low Expansion Polished Industrial Instrument Glass is supplied as a display / touchscreen cover glass made from Optical/technical glass: soda-lime, high-alumina,. Listed geometry: size Custom, thickness 0.5-25mm (ultra-thin 0.5-1.1mm; borosilicate 1.5-2, round disc, square, rectangular, custom outline, s shape. It is used in Optical. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Optical/technical glass: soda-lime, high-alumina, |
|---|---|
| Type | Optical Glass |
| Shape | Round disc, square, rectangular, custom outline, s |
| Size | Custom |
| Thickness | 0.5-25mm (ultra-thin 0.5-1.1mm; borosilicate 1.5-2 |
| Application | Optical |
| Usage | Sight glass, level gauge, boiler/furnace observa |
| Model NO. | HT-OPG |
| Structure | Solid |
| Moh's Hardness | 6 |
| Function | Optical Function, Thermal Function, Mechanics and Mechanical Function |
| Transparency | Transparent |
| Processing Method | CNC cutting, grinding, optical polishing, drilling |
| Preparation Process | Fusion Method |
| Color | Clear, ultra-clear |
| Custom Attribute: Coating | AR/AF |
| Place of Origin | Qingdao |
| Quality Control Process | Incoming Material Check |
| Certifications | ISO 9001 Quality Management System |
| Sea Freight | 25–40 days transit. Cost-efficient for bulk orders; FCL & LCL available. |
| Air Freight | 4–7 days transit. Perfect for urgent shipments. |
| International Express | 3–5 days transit. Door-to-door service by DHL, FedEx, UPS, optimal for samples and small packages. |
| Key Production Equipment | – CNC glass-cutting and shaping machines |
| Custom Attribute | Coating: AR/AF |
| Supplier | Qingdao Hitech Glass Co.,Ltd |
Technical data
| Application | Recommended Material | Typical Form and Processing |
| Cover panels and touch surfaces | Ultra-thin soda-lime / high-alumina OG02 | 0.5-1.1mm, chemical strengthen, silk-screen border |
| Camera and sensor windows | Ultra-thin borosilicate / high-alumina OG02 | AR/AF coated, precision cut, polished edge |
| Optical substrates for coating | Ultra-thin borosilicate 3.3 OG02 | 0.5-1.1mm, polished, low inclusion |
| Boiler and furnace observation | Borosilicate 3.3 OG03 | Round disc, 450C, DIN sight-glass size |
| Tank and boiler level gauges | Borosilicate OG03 / fused quartz OG04 | Long strip or disc, ground and polished |
| Oven and appliance sight windows | Borosilicate 3.3 OG03 | 3-5mm, optional heat-bend and black border |
| High-temperature furnace windows | Fused quartz OG04 | To about 1100C, JGS2/JGS3, polished |
| UV and IR optical windows | Fused quartz JGS1/JGS2/JGS3 OG04 | Wavelength grade, optical polish |
| Laboratory and spectrometer parts | Fused quartz OG04 | Discs, plates, cuvette and gauge blanks |
| Semiconductor process carriers | High-purity fused quartz OG04 | Custom machined shapes, acid resistant |
| High-pressure vessel viewports | Sapphire OG05 / quartz OG04 | Thick disc, flange fit, rating per assembly |
| HF and strong-acid reactors | Single-crystal sapphire OG05 | Acid-inert window, polished |
| Vacuum chamber and R and D viewports | Sapphire OG05 | UV-IR transmitting, scratch proof |
What to specify when you request a quote
- Glass type and thickness — listed as “Optical/technical glass: soda-lime, high-alumina,”; name the glass (soda-lime, aluminosilicate, borosilicate) and thickness.
- Strengthening — state thermal tempering or chemical strengthening and the required surface compression or impact rating.
- Printing and coatings — listed as “Sight glass, level gauge, boiler/furnace observa”; list silk-screen colours, windows, and any AR / AG / AF coating.
- Outline and edges — listed as “Round disc, square, rectangular, custom outline, s”; send a drawing with cut-outs, holes and edge finish.
- Optical requirements — give transmission, haze or gloss targets for the viewing area.
Engineering guides for this part
For material grades and coating options, see AR-Coated Glass Materials for High-Transmission Optical Parts. How parts like this are machined and finished is covered in Flat Glass Polishing Process for Precision Substrates. For an application example, read AR Glass for Appliance Touch Screens: Selection & Integration. Before sending a drawing, check Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica. A related standard product is AR Anti-Reflection Optical Window.
