Sharples Edge-stress meter S-67

Used for:

For edge stress measurement in glass

It is a portable instrument which allows quantitative measurement with the Senarmont method of compensation.

Features: The procedure is non destructive, and can be used on both flat and curved glass.

 

Principle of operation:

A transparent scale allows measurements to be made at distances of up to 50 mm from the edges of sheets. An adjustable magnifying lens, incorporating a half-field monochromatic green filter (546nm in wavelength) is provided for observing the interference fringes, visible near the edges of the glass, when taking quantitative measurements.

Technical characteristics:

Glass thicknesses of up to 25 millimetre can be measured