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Sight Glass Materials

Special Glass for Sight Glass Applications

Sight glasses are usually manufactured from glasses that must not have to offer optical quality. They only have to be clear to allow the visual control and monitoring of processes behind the sight glass. Such glasses can also be used for lighting applications. For example, temperature-resistant sight glasses are frequently used as front windows for powerful light sources. So sight glasses generally do not have to have optical quality. Flatness, parallelism, and surface quality do not matter usually. By that these materials are more economical than the same glass type with optical grade quality. Below you will find an overview of our available materials that are suitable for sight glass applications:


Natural Fused Quartz Glass (Sight-Glass Quality)

Natural quartz glass (Fused Quartz) is used whenever the optical quality such as flatness, surface quality, or homogeneity plays a subordinate role. For example, we manufacture sight glasses, front glasses for hot UV light sources, etc., of natural quartz glass. For more demanding applications our optical quartz glass (fused-silica) is more suitable. More...


RD 30® Radiation Shielding Glass

The RD 30® monolithic X-ray protection glass offers protection against weak gamma and X-ray radiation. The sight glass is used in medical technology as well as in material testing for the shielding of X-rays. More...


RD 50® Radiation Shielding Glass

RD 50® has a significantly higher lead equivalent than RD 30® and therefore offers a stronger radiation shielding effect. The heavy flint glass is available in a wide range of thicknesses up to 21.5 mm. More...


If you need a glass with more sophisticated optical quality, please take a look at the product categories Sheet-Glass, Thin Glass and Optical Glass.


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