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Made in the USA

Standard Sight Glasses

Our sight glasses allow direct visual observation of processes within industrial pipes, tanks, and vessels. Most competing units consist of a piece of glass sandwiched between two metal flanges. By contrast, our sight windows are designed to circumvent the significant limitations of such designs, and provide the users with an easily maintained installation that offer large margins of safety. Custom safety sight glasses can be designed to meet your exact specifications.

The majority of our units are Factory Mutual approved. The following standard models are available for immediate ordering at (800) 624-9043 (click on any listing for a product description, engineering details, materials of construction, and unit image).

Model L Flange

Model L Flange >

Simple, safe and economical are the hallmarks of the Model L Flange sight glass.
Model S Flange

Model S Flange >

The Model S combines the lowest cost on the market with the ease of installation associated with our premium models.
Model B Flange

Model B Flange >

The Model B offers safety and strength in a low-maintenance package.
Model I Flange

Model I Flange >

The Model I flange unit is a solution where corrosion resistance is only needed on wetted parts of the sight glass.
Model I Flange Slip-On

Model I Flange Slip-On >

The Model I slip-on unit is a solution for deeply recessed or unusually sized connections.
Model A Flange

Model A Flange >

A standard sight glass using snap and retainer rings for lens and packing retention.
Bull's Eye Sight Glasses

Bull's Eye Sight Glasses >

Bull's Eye units offer the highest pressure and temperature ratings of any sight glass.
Hinged Closure Sight Glass

Hinged Closure Sight Glass >

Provides convenient access to the process without the need to fully disassemble and re-assemble a unit.
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