Glass Surface Compressive Stress Meter for Toughened Glass

Portable optical meter whose prism reads fringe spacing to give surface compressive stress of tempered glass in MPa without breaking the pane. Used by toughening plants for process control.

Specification

A prism couples light into the glass surface and fringe spacing gives surface stress. It checks if thermally toughened glass meets the 90 MPa minimum in a non-destructive way.

Features

• Digital reading of surface stress
• Optical prism coupling
• Portable body
• Works on float and tin side
• Battery operated

Technical Specifications

Stress range	0 to 500 MPa
Accuracy	+/- 3 percent
Glass thickness	3 to 25 mm
Light source	LED 589 nm
Display	Colour screen
Weight	1.4 kg
Standards	ASTM C1279, ASTM C1048, EN 12150
Power	Rechargeable battery

Standard Accessories

• Prism
• Coupling fluid
• Case