Model: HHLGTL.
Overview
The Precision Technical Sight Glass Lens is supplied as a sight / viewing glass. Listed geometry: size Od From 50mm to 500mm. Optical / electrical data: transmittance Visible light transmittance ≥92%, low iron & zero distortion, dedicated to spectral detection and precision imaging;, sheet resistance Long working temperature ≤ 450 ° C, short time working ≤ 500 ° C. Temperature Industrial oven sight lens, high-low temperature test chamber optical panel, heating chamber light window. 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 |
|---|---|
| Item | High Pyrex Pressed Round Sight Glass Lens |
| Model NO. | HHLGTL |
| Process | Cut, Polish, Ground, Tempered |
| Property 1 | Borosilicate Heat Resistant |
| Shipment | by Sea, by Air, by Courier |
| Tempered soda lime lens | Cost-effective for normal-temperature observation and general sensor light paths; |
| Borosilicate optical lens | Wide temperature range from -40ºC to 300ºC, outstanding thermal shock resistance for high-temperature chambers & thermal cycling equipment; |
| High-transmittance optical glass lens | Visible light transmittance ≥92%, low iron & zero distortion, dedicated to spectral detection and precision imaging; |
| Stepped optical lens | Multi-layer concentric tiers with micron-level thickness control, ideal for light splitting, liquid level and flow monitoring equipment. |
| AR anti-reflection coating | Reduce light reflection, boost transmittance for clearer observation under strong light; |
| Hydrophobic oleophobic coating | Anti-fingerprint, anti-oil & limescale, easy to wipe clean; |
| Dust-proof passivation coating | Reduce dust adhesion and lower equipment maintenance frequency. |
| Photoelectric sensing | Photoelectric sensor lens, optical calibration lens, spectral analyzer light path lens |
| Flow measurement | Flow meter stepped observation lens, tank liquid level optical sight glass, pipeline transparent lens |
| Lab biological equipment | Photobioreactor light lens, incubator observation lens, reactor optical window |
| High-temperature industrial equipment | Industrial oven sight lens, high-low temperature test chamber optical panel, heating chamber light window |
| Industrial control testing | Control cabinet display lens, automatic detector optical lens, new energy storage equipment observation window |
| Optional Material | Tempered soda lime glass / Heat-resistant borosilicate optical glass / Low iron high-transmittance float optical glass |
| Visible Light Transmittance | 90%~92% |
| Machining Precision | Flat lens parallelism ≤0.005mm; Step height tolerance ±0.005mm |
| Lens Types | Flat lens / Concentric stepped optical disc / Curved convex-concave lens / Square embedded lens |
| Optional Processing | CNC precision grinding, hole drilling, AR anti-reflection coating, hydrophobic anti-fingerprint coating, silk screen printing |
| Safety Feature | Tempered version 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 optical glass / Low iron high-transmittance float optical glass”; name the glass and thickness.
- Temperature and pressure — listed as “Industrial oven sight lens, high-low temperature test chamber optical panel, heating chamber light window”; give working temperature, thermal shock and any pressure rating.
- Strengthening and safety — listed as “Cost-effective for normal-temperature observation and general sensor light paths;”; 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 Borofloat 33 Glass: Material Selection for Precision Substrates. How parts like this are machined and finished is covered in Borosilicate Glass Sandblasting for Consistent Matte Surface Processing. For an application example, read Quartz Glass Windows for High-Temperature Appliance Modules. Before sending a drawing, check Thermal Conductivity of Quartz Glass & Fused Quartz: A Process Guide. A related standard product is Infrared Windows.
