Transparent Gauge Glass Used in Industry Pipe

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Transparent gauge glass, also called transparent sight glass, transparent level glass and transparent level gauge, is usually made of borosilicate glass and aluminosilicate glass. The glass is manufactured into the strip shape and used in boiler or some instruments for observing the liquid level.

Transparent gauge glass uses high quality material and it is usually thick in order to resist aggressive environment, such as high temperature, high pressure, acid and alkali. It has clear surface to make sure the high transparency for observing the liquid level more clearly.

Because of the rust resistance feature and high transparency, the transparent gauge glass is widely used in industry, petrol, chemistry and medicine.

There is a piece of thick strip gauge glass with clear surface and polishing edge.

Strip gauge glass is used in industry to observing the flow of liquid and liquid level.


Material: borosilicate glass, aluminosilicate glass.

Form: strip.


TYPE A: width 30 mm and thickness 17 mm.

TYPE B: width 34 mm and thickness 17 mm.

TYPE H: width 34 mm and thickness 22 mm.

TYPE TA 28: width 27.6 mm and thickness 16.8 mm.

According to customers' requirements.

Length: 70-500 mm.

Width: 20-40 mm.

Thickness: 10-30 mm.

Max pressure: 400 bars.

Max temperature: 800 °C.

Accessories: gasket and mica sheet can also be provided together.

The four piece of transparent gauge glass are of high thickness.

Thick transparent gauge glass can stand high temperature and high pressure for industry application.There are a few pieces of accessories together with transparent gauge glass on the ground.

Accessories, such as gasket and mica sheet can be provided together with transparent level gauge.

Pressure and temperature of transparent gauge glass


Pressure Temperature Pressure Temperature Pressure Temperature Pressure Temperature

Soft environment 240 bar 120 °C 290 bar 120 °C 340 bar 120 °C - -

160 bar 400 °C 800 bar 400 °C 230 bar 400 °C - -

0-10 bar 430 °C 0-10 bar 430 °C 0-10 bar 430 °C - -

Aggressive environment 35 bar 243 °C 35 bar 243 °C 42 bar 253 °C 120 bar 324

70 bar 300 °C 85 bar 300 °C 85 bar 300 °C 180 bar 356 °CA boiler part for liquid level observing uses a piece of transparent sight glass.

Transparent gauge glass is most widely used in boiler for reading liquid level.

Features and advantages

High working temperature and pressure 

We can recommend suitable material and thickness according to your working environment. Our quartz glass can work under 800 °C temperature.

Acid and alkali resistance 

Glass material is stable and the borosilicate and quartz glass can resist most acid and alkali, which expands the life time of transparent gauge glass.

High transmittance 

As the glass to observe the liquid level, light transmittance is very important. Glass can meet the requirement.

Friendly to environment 

Unlike plastic, glass is friendly to environment both during production and using.


The transparent gauge glass is used in various equipment where the liquid level is required to be read in many fields.

Used in boiler.

Used in some instruments.

Used in chemical and industry pipes.

Packing and transportation

Transparent gauge glass is packed by plastic bag with bubble and then in carton. The outside is wooden case or pallet.

Other seaworthy package according to customers' requirements.

We can transport the goods by air or by sea.

Contact us immediately if you are interested in any of our gauge glass. And you can email us at if you have any questions.

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Ms. Ella
Tel: 86-318-8166777
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Dongyue Industry Co., Ltd.
Industrial zone No 88, Hengshui, Hebei, China (Mainland)
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