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Sight Glass Materials

Specialty Glass for Sight Glass Applications

Sight glasses are usually made from glass types that don't have to offer optical quality. They only must be clear to allow visual inspection and monitoring of processes behind the sight glass. Sight glasses generally do not need to provide optics quality. Flatness, parallelism, and surface quality do not matter. Hence, such materials are suitable for lighting applications, viewing ports, temperature-resistant sight glasses for high-power UV-light sources, and similar applications. These materials are more economical than the equivalent glass type with optical grade quality. Below please 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 the right choice 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, and similar natural quartz glass parts from this material. For more demanding applications, our optical quartz glass (Fused Silica) is a more suitable material option. More...


Soda-Lime-glass with Sight Glass Quality

Our soda-lime glass with sight glass quality is suitable for sight glass applications that do not require a high optical standard in terms of flatness, surface quality, or purity. The glass looks clear and high quality with the naked eye and under normal light conditions. 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 and material testing applications to shield X-rays. More...


RD 50® Radiation Shielding Glass

RD 50® has a significantly higher lead equivalent than RD 30® and offers a more substantial 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 look at the product categories Sheet-Glass, Thin Glass, and Optical Glass.


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