
MAXOS® - MADE IN GERMANY
MAXOS® safety sight and level gauge glasses have proved themselves universally where visual process control is essential. This includes pressure vessels subjected to thermal and chemical stresses and liquid level gauge application.
A high safety level is ensured by the use of special borosilicate glass of high chemical durability, exceptional purity and homogeneity. Combined with thermal pre-stressing (tempering), high precision processing Auer Lighting guarantees sight and level gauge glasses of highest quality.
Auer Lighting sells MAXOS® in more than 50 countries all over the world. Our special tempered reflex and transparent level gauge glasses and disc sight glasses can be supplied in a wide variety of sizes to fulfill our customers' requests.
MAXOS® - a registered trademark of Auer Lighting GmbH



Technical characteristics of MAXOS® Long form
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.
For safety reasons, the stress to the glasses caused by internal forces, thermal stress and vessel pressure have to be totally absorbed by the surface compressive stress so that a tensile stress of the glass surface is prevented.


Bending strength (typical values)
Standard level gauge glasses | |
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≥ 150 N/mm2 | 21.000 psi |
Average 170 N/mm2 | 25.000 psi |
High pressure level gauge glasses | |
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≥ 180 N/mm2 | 26.000 psi |
Average 200 N/mm2 | 29.000 psi |
Surface compressive stress
Standard level gauge glasses | |
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≥ 90 N/mm2 | 13.000 psi |
Average 100 N/mm2 | 14.500 psi |
High pressure level gauge glasses | |
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≥ 100 N/mm2 | 14.500 psi |
Average 110 N/mm2 | 16.000 psi |
Temperature
Thermal shock resistance Δ T 265 K | |
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Max. permissible temperature | 300 °C (572 °F) |
Protected with mica | 320 °C (608 °F) |
Parallelism
Standard level gauge glasses | |
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≤ 0,08 mm | 0,003 inches |
High pressure level gauge glasses | |
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≤ 0,05 mm | 0,002 inches |