Model: HHLTG.
Overview
Industrial Technical Glass Observation/Inspection Window is a sight / viewing glass. Listed geometry: size Od From 50mm to 500mm. Optical / electrical data: transmittance 90% ~ 92%, sheet resistance Long working temperature ≤ 450 ° C, short time working ≤ 500 ° C. Temperature Long working temperature ≤ 450 ° C, short time working ≤ 500 ° C. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Size | Od From 50mm to 500mm |
|---|---|
| Model NO. | HHLTG |
| Process | Cut, Polish, Ground, Tempered |
| Property 1 | Borosilicate Heat Resistant |
| Shipment | by Sea, by Air, by Courier |
| Item | High Pyrex Pressed Round Sight Glass |
| Tempered soda lime sight glass | Cost-effective for normal & medium-low temperature equipment without strong corrosive media; |
| Borosilicate sight glass | Wide temperature range & superior thermal shock resistance, perfect for high-temperature furnaces & thermal cycling chambers; |
| Stepped optical disc | Micron-precision tier structure with zero optical distortion, dedicated for optical sensors & spectral testing instruments. |
| Optional Material | Tempered soda lime glass / Heat-resistant borosilicate glass / High transmittance stepped optical glass |
| Visible Light Transmittance | 90% ~ 92% |
| Standard Thickness | 2/3/4/5/6/8/10/12/15mm |
| Tempered soda lime | -30ºC ~ 180ºC |
| Borosilicate glass | -40ºC ~ 300ºC |
| Available Styles | Flat sight window / Concentric stepped sight disc / Square embedded sight panel |
| Optional Processing | CNC edge grinding, hole drilling, AR anti-reflection coating, hydrophobic anti-fingerprint coating, silk screen scale printing |
| Safety Feature | Breaks into blunt granular fragments, shatter & splash proof |
| Temperature resistance | Long working temperature ≤ 450 ° C, short time working ≤ 500 ° C |
| Light transmission rate | 95% up |
| Hydraulic Water-resistant strength | More than test 40Kgf/cm ² |
| Thermal stability | T300 ° C |
| Linear expansion coefficient (0-300 ° C) | 3.3 × 10-7 K-1 |
| Softening temperature | 820° C |
| Supplier | Jinan Honhai Glass Company Limited |
What to specify when you request a quote
- Glass type and thickness — listed as “Tempered soda lime glass / Heat-resistant borosilicate glass / High transmittance stepped optical glass”; name the glass and thickness.
- Temperature and pressure — listed as “Long working temperature ≤ 450 ° C, short time working ≤ 500 ° C”; give working temperature, thermal shock and any pressure rating.
- Strengthening and safety — listed as “Cost-effective for normal & medium-low temperature equipment without strong corrosive media;”; state tempering, lamination or the safety standard.
- Outline and edges — listed as “Od From 50mm to 500mm”; send a drawing with outline, holes and edge finish.
Engineering guides for this part
For material grades and coating options, see How to Use and Maintain JGS2 Quartz Glass for Optical Windows and Custom Parts. How parts like this are machined and finished is covered in Precision AR Coating Process for Optical Glass Windows. For an application example, read Quartz Glass Windows for High-Temperature Appliance Modules. Before sending a drawing, check Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica. A related standard product is Infrared Windows.
