Tubular Gage Glass

At tgrankin.com we feature Duran borosilicate tubular gage glass. Duran, as manufactured by Schott is the highest quality liquid level gage glass tubing in the world.The same exacting manufacturing controls are applied to the production of Duran Tubular Gage Glass as are used on all Schott products. Each piece of genuine Duran tubular gage glass of standard length and case quantities has the following identification imprinted on the glass:
Type of Glass, Co-efficient of expansion, Style of glass for example: Duran Redline, Hour and minute of manufacture, Date of manufacture.

For information on gage glass packaging and pricing click here

Duran Redline Gage Glass has a red line between two white lines, which in the presence of a colorless liquid magnifies the red line. The bold red line makes it easier to read the liquid level. Redline tubular gage glass is widely used in tanks, reservoirs, and low-pressure boiler applications.

Duran Heavy Wall Gage Glass has the highest pressure rating of any tubular gage glass manufactured. It is available in Heavy Wall Clear and in Heavy Wall Redline. Heavy Wall Gage Glass is commonly used in liquid level gage and sight flow indicator applications that exceed the temperature and pressure of High Pressure Gage Glass. Heavy Wall Gage Glass has a maximum length of 48 inches.

Duran High Pressure Gage Glass is the most widely used clear tubular gage glass. It is specially formulated and manufactured for service that requires greater pressure temperature and corrosion resistance than Standard Gage Glass.

Duran Standard Gage Glass is commonly used in liquid level gages for vented tanks, restaurant and lighter duty level and flow applications.

Other types of tubular gage glass are available and are often in stock at T.G. Rankin Company. We offer outer diameters up to 1-1/2". The tubular glass offered on our web pages is all borosilicate. Other materials are available including Soda-Lime, Acrylic, Poly Carbonate (Lexan), Poly Sulfone, Quartz, Vycor, and other borosilicate formulations.


Packaging: For reliable shipping and storage, we offer standard factory lengths in 12-per pieces per case cartons or custom cut 6-pack, bulk and custom packaging to your specifications are all available. Custom lengths and fire polished ends are available on request.

To contact us for additional information please click here

Important Note: Never exceed the liquid level gage manufacturer or the
glass manufacturer’s pressure or temperature ratings.