Borosilicate gauge glass

Product details

With low coefficient of thermal expansion, good thermal stability and chemical performance.

The quality of gauge glass depends on its chemical composition, mechanical strength, dimensional accuracy.

Bending strength is determined by the surface compressive stress and the inherent resistance of the glass. The inherent resistance is heavily dependent upon the surface quality.

Borosilicate gauge glass according to DIN7081.

Physical property

Density: 2.23±0.02g/cm³

Coefficient of thermal expansion: (0-300°C) 3.3±0.1x10^-6 K^-1

Softening point: 820±10°C

Strain point: 516±10°C

Working temperature: up to 450°C

Bending strength:  ≥100Mpa

Chemical resistance

Alkali resistance: alkali class 2, tested to ISO695/DIN52322

Water resistance: tested to DIN-ISO719-HGB1/DIN-ISO720-HGA1

Acid resistance: acid class 1, tested to ISO1776/DIN12116

Application

Widely used for observation of vessels (tanks/boilers/industrial oven/liquid level gauge), chemical processing, water engineering, oil refineries and marine engineering etc.

Packing

The glass is packed in individual white box, cardboard case.

Standard DIN dimensions