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MAXOS® Safety Sight Glass

MAXOS® — clear sight with definite safety

Whether in the chemical industry, the oil industry or the power supply sector, Maxos safety sight glasses are proven and used all over the world whenever visual inspections under extreme temperature or pressure conditions are required in steam vessels, pressure tanks or pipeline systems.

The high safety level is secured by special borosilicate glass of high chemical durability, exceptional purity and homogeneity. Along with a low thermal expansion, which is typical for borosilicate glass, thermal pre-stressing (tempering) creates a particularly high resistance to sudden changes in temperature.

The Maxos product line comprises a complete range of round and long sight glass in varying dimensions to accommodate different pressure and temperature ranges

Product range overview

Level gauge glasses

Round sight glasses

Length and diameter

95–500 mm / 3.7 - 19.7 in.

30–265 mm / 1.2-10.4 in.


30, 34 mm / 1.2, 1.3 in.



17, 21 mm / 0.67, 0.83 in.

10–30 mm / 0.39-1.18 in.

Max. thermal shock resistance

265 K

265 K

Max. permissible temperature

300°C and 320°C (572°F and 608°F) when mica-protected

Other specifications

Transparent and reflex design

High-pressure design

Transparent with 34 mm (1.3 in.) width

In addition to the safety sight and liquid level gauge glass listed in the product table, we can supply other special dimensions. We will gladly send you a comprehensive overview of their available product range along with detailed data sheets.

Please contact your Parker Supply application specialist for more information or for help selecting the right product for your specific application.

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