Designed for use with circular cutouts, these panels have gaskets that form a tight seal to keep out dust and moisture.

Install on circular cutouts to access and inspect the interior of tanks and hoppers.

The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window.

View tank contents from multiple angles through the plastic domed window.

Continuously monitor oil quality through the clear plastic reservoir and use the attached drain valve to remove water accumulation.

With a thick glass window fused to a metal body, these sights resist cracking at high pressures.

Weld these sights to single-wall tanks.

An extended flange makes these sights easy to bolt onto tank walls.

Press these sights into a hole in your tank wall; no additional mounting nuts are needed. They mount from the outside.

Add a window to your high-vacuum system. With a pane of glass sealed inside a high-vacuum CF flange, these sights bolt onto vacuum chambers, tee fittings, and manifolds.

Also known as cleanouts, panels cover cutouts in duct to provide access for inspection and cleaning.