Kaufman Glass Company provides sight glasses that are designed to provide maximum user safety. Essential in many chemical and industrial applications our high quality sight glasses assure safe observation of high temperature and high pressure operations.

Our Pyrex brand and Borofloat sight glasses are made from borosilicate glass. We also offer Vycor brand sight glasses which are made of number 7900 96% silica glass. Both are widely used in industry and are well known for their mechanical, chemical and thermal stability. A noteworthy difference between our Pyrex and Vycor brand sight glasses is that Pyrex can be heat treated or tempered to about 3 times its annealed strength, but Vycor cannot be tempered due to its extreme heating temperature.

Our sight glasses are available in many standard sizes. Annular Edge glasses have raised rims that have been ground flat to provide a 1/2" wide gasket surface which is essential for pressure applications. Circles cut from plate glass, ground flat and polished for optical clarity, have outer edges which are ground to close diametral tolerances.

MOLDED SIGHT GLASSES

Pyrex brand 3/4" Annular Edge sight glasses are safety labeled on the glass, as well as the package. They are available annealed for normal and alkaline use, or tempered for pressure and temperature applications.

Kaufman Glass Company's specialty flat glasses have unique chemical, mechanical, thermal, and optical properties that enable them to provide long service and fulfill requirements that common window glass cannot meet.

PYREX BRAND NO.7740 AND BOROFLOAT FLAT GLASSES

These glasses combine resistance to both heat and chemical attack. They also transmit short infrared and near ultraviolet radiation. They are available tempered or untempered with either a polished plate or a rolled surface.

Applications for Pyrex brand No. 7740 and Borofloat flat glasses include specialty windows where transparency, as well as, protection of personnel, equipment or instrumentation is essential.

VYCOR BRAND NO.7913 FLAT GLASS

This glass provides the best resistance to heat, severe chemical attack, and thermal shock of any of the Corning Specialty Flat Glasses. It also transmits the most infrared and ultraviolet wave lengths. Available with either a polished plate or rolled surface, Vycor's mechanical strength is slightly less than that of Pyrex or Borofloat.

Applications for Vycor brand No. 7913 flat glass includes windows which must survive extremely high temperature shocks, or transmits which are far beyond the visible spectrum. It is also used for high temperature firing plates.

BOROSILICATE INFRARED REFLECTING GLASS

This glass has a metallic oxide film permanently bonded to one side, which makes it highly effective as a reflector of infrared energy, especially past 1.8 microns. Because of its conductive coating, this glass is also recommended for electrostatic shielding.

The coating on Infrared Reflecting Glass is chemically durable, as hard as the glass itself. It will not scratch, peel or loosen. It transmits approximately 75% of the visible light, about the same as a tinted automobile windshield. Other than the transmission characteristics, Infrared Reflecting Glass has the same properties as Borosilicate glass.

BLUE COATED FURNACE OBSERVATION GLASS

This is a heat resistant blue coated Vycor glass that filters out most of the visible light, but transmits a high percentage of infrared radiation. It is used to reduce glare when observing flame, smoke and ash intensity in power plants, and marine boilers. It is also recommended for other furnace observation applications.