# Lab equipment glass: viewing windows, sight glass, and printed panels

Viewing windows, doors, and panels for laboratory and scientific equipment. Tight tolerance, low-iron clarity, and printed graduations or masks fired into the glass.

Group: Industrial & equipment

Source: https://www.temperededge.com/industries/lab-equipment/

## Part families

- **Viewing windows**: Tempered lites for instrument doors and enclosures, cut to tight tolerance.
- **Sight glass panels**: Thicker lites where the panel sees pressure differential or impact.
- **Printed masks & scales**: Ceramic frit graduations, borders and blackout masks fired in permanently.
- **Drilled & notched panels**: Hardware holes, standoffs and notches cut before tempering.

## Specifications

| Spec | Value |
| --- | --- |
| Panel sizes | Small instrument lites through 90" × 144" |
| Thickness | 1/8"–1/2" (3–12 mm) by application |
| Glass types | Clear from stock. Low-iron is ordered when the enclosure is lit and the sample color matters. |
| Edgework | Ground or polished for handled and sealed edges |
| Decoration | Ceramic frit masks, scales, legends |
| Size tolerance | ± 1/32" on cut size; squareness within 1/16" |
| Standards | ANSI Z97.1-2015 Class A · 16 CFR 1201 Category II (400 ft-lb) · permanent temper mark |
| Documentation | First article and dimensional confirmation on request |

## What we handle here

- **Ceramic frit screen printing** Borders, blackout bands, logos and legends fired into the glass during tempering. Permanent.
- **Drilling and edgework in-house** Holes, countersinks, and seamed, ground, or polished edges, finished here before the glass ships.
- **Large-format CNC cutting** Shapes, notches and radii cut from your DXF or DWG on lites up to 90" × 144".
- **Tempering under the same roof** Cut, printed and tempered in one building, so a print revision doesn't ripple through three subcontractors.

## FAQ

### Can you print graduations or a scale on the glass?

Yes. Ceramic frit, fired during tempering. Cleaners and repeated wiping do not take it off the way they take off pad printing or film.

### How tight a tolerance can you hold?

± 1/32" on cut size is standard. If your seal needs tighter, tell us before quoting and we'll say honestly whether we can hold it.

### Is tempered glass right for a sight glass under pressure?

It depends on the pressure and how you need the glass to fail. Send the application data. We would rather turn a part down than ship one that fails in the field.

## Related industries

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- [display-cabinets](https://www.temperededge.com/industries/display-cabinets/index.md)
- [sneeze-guards](https://www.temperededge.com/industries/sneeze-guards/index.md)
- [concessions](https://www.temperededge.com/industries/concessions/index.md)