Easily view liquid movement and level changes from a distance—these sights have an indicator ball inside the glass window.

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

Often used in kilns and other heating equipment, these sights have a quartz window that can withstand temperatures up to 1600° F. They're also known as peep sights.

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

Weld these sights to single-wall tanks.

Mount these indicators on the outside of tanks in food, pharmaceutical, and other sanitary environments to monitor their liquid levels.

Shut-off valves stop flow so you can clean and replace gauge glass without removing these indicators from your equipment.

Measure water, hydraulic fluid, or diesel fuel level in your drum.

For visual confirmation of flow from a distance, these sights have a ball indicator that moves when flow is present.

Often used in cooling, lubrication, and process systems.

A ball indicator increases the visibility of flow for checking at a distance.

To maintain a clear view of your process media without disrupting flow, twist the tubular window to clear debris and buildup with the internal wipers.