The temperature measured at a specified glass-surface location, time, area, and instrument configuration.
GlassRenu · Educational illustration
Meaning and boundaries
A noncontact thermometer reads an instrument-defined spot influenced by emissivity, reflection, distance-to-spot ratio, angle, and background; it does not reveal the full through-thickness or edge temperature field.
Why it matters in glass restoration
Useful readings require documented locations and instrument limitations so local heating and pane gradients are not understated.
Related terms
References
- GlassRenu — Before You Begin
Publisher’s original source - National Institute of Standards and Technology — NIST TN 1297: Guidelines for Evaluating and Expressing Measurement Uncertainty
Publisher’s original source - Vitro Architectural Glass — Thermal Stress Update
Publisher’s original source - National Glass Association — Thermal Stress in Heat-Treated Spandrel Glass
Publisher’s original source