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Sight Glass Manufacturers and Companies

IQS Directory provides a detailed list of sight glass manufacturers and suppliers. Find sight glass companies that can design, engineer, and manufacture sight glasses to your specifications. Peruse our website to review and discover top sight glass manufacturers with roll over ads and complete product descriptions. Connect with the sight glass companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for manufacturers of industrial sight glass, plant sight glass, and sight glass frames of every type, IQS is the premier source for you.

  • New Haven, IN 260-749-9614

    Founded in 1950, S & S Optical Company is a leader in sight glass and other products. Their engineers are skilled in making various parts for optical, industrial, aerospace and military, marine and more applications. Supplying diverse manufacturers across the country and globe, S & S Optical is a company you can rely on for high quality products and exceptional customer service.

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  • Cambridge, ON 800-315-0387

    Glass cutting is a varied industry, and we have done it all for the past 50 years. We believe in manufacturing high quality glass products that will exceed customer expectations every time. Our goal and mission has always been to ensure our customers are satisfied and will come to us with all of their glass needs. Contact us to learn more today!

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  • Painesville Township, OH 440-639-6399

    Founded in 1990, Technical Glass Products is a fabricator of Fused Quartz Glassware. We maintain a broad inventory of labware, flat stock, rod and tubes in addition to providing custom fabrication using state of the art equipment to suit your needs. Our commitment to excellence has resulted in TGP becoming America’s fastest growing supplier of stock shapes and fabricated products in the industry.

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  • Port Jervis, NY 845-856-5375

    Gillinder Glass prides itself in engineering molded technical glass for tomorrow’s technology. Since 1861, we have been providing our customers superior glass products and glass fabrication services. Heat resistant glass is among our trusted products, which have served the marine, aircraft, industrial and landscaping industries in a variety of applications. Superior quality standards with ISO 9001:2015 certification. Contact Gillinder and let us meet all your glass needs today!

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  • Hartford City, IN 765-348-3100

    Sinclair Glass has been in the glass business since 1950. We specialize in making bent glass products in runs of 50 or more, but are also just as versatile in fabricating flat glass in any sort of shape or finish. Whatever your specifications, we have the equipment and expertise to bring your custom glass concepts to life, and the drive to exceed your expectations in doing so.

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businessIndustry Information

Sight Glass

Sight glass is used in industrial plants and machines in order to visually observe and monitor liquid and material levels, colors, flows or direction. It can be installed as the windows of a piping system, an external vacuum tube, or as a component with a frame screwed between two metal pipes. Tanks, boilers, reactors or vessels may contain components of sight glass in the form of liquid level gauges or inline sight points. Further uses include media vessels in chemical plants and in other industrial settings such as breweries, bio gas plants, pharmaceutical, food processing and beverage.

Also referred to as sight windows or sight ports, sight glass components are important for a number of reasons. For consumer and beverage industries it is necessary to ensure levels remain high. In some machines, without a specific amount of necessary liquids, the engines could seize and cause great damage; therefore it is imperative the levels are monitored to remain in a safe phase. Sight glass can come in different forms; however the most common type of sight glass is composed of a tempered glass disc between two metal frames which have been secured together allowing the operator of the equipment to determine the level of liquid contained within.

The glass used must be transparent in order for the level of liquid to be observed and therefore color additives or coatings are not typically used with sight glass. However, to ease the reading of the level, a backboard may be a component of the sight glass mechanism. Sight glass is typically manufactured as safety glass in order to prevent any pressure or tension resulting in breakage and potential physical damage to personnel working with the machinery. However, glass which has been tempered or mechanically stressed prior to installation is less likely to break and therefore it is used for sight glass to reduce the risk of explosions. The glass used for sight glass fabrication is made using soda lime or borosilicate glass. Soda lime glass tends to be more cost-effective and is a good quality material. However, when tensile strength and a lower coefficient of expansion are required in a piece of sight glass, more expensive borosilicate glass is used. It is unlikely that borosilicate glass will crack or break even when exposed to temperature changes and pressure. Sight glass can be further strengthened through the process of annealing and ion exchange chemical strengthening.

More Sight Glass Information
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Sight Glass - Pegasus Glass
Sight Glass - Pegasus Glass



Sight Glass Informational Video