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.

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

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.

Check the contents of your tank from multiple angles with the domed window. To mount these sights, fasten their extend flange to tank walls.

Weld these sights to single-wall tanks.

Designed with quick-clamp (KF) connections, these sights connect to a port on a high-vacuum chamber, so you can monitor what's happening inside.

The nylon body and window make these indicators shatter resistant.

Made with clear, shatter-resistant plastic, these indicators don't require a shield to protect them like other oil-level indicators, so you can check your hydraulic fluid or oil level from any angle.

Check the level of liquids containing chemicals such as alcohol-based solvents, boric acid, and sodium bicarbonate.

Use this gauge glass with heavy duty level indicators.

Combine a pair of valves with a gauge glass and four guard rods to build a complete level indicator.

Check both the temperature and the hydraulic fluid or oil level in a pressurized system.

Seal the glass on your level indicator.

Monitor liquid level in applications that have vibration, high pressures, and high temperatures. These indicators are also known as armored level gauges.

With a stainless steel float and float rod, these gauges resist corroding from chemicals.

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

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

Often used in cooling, lubrication, and process systems.

Rated for more than double the pressure of standard flow sights, these can withstand pressures up to 400 psi.

Barbed fittings slide into soft plastic and rubber tubing.

About half the height of other flow sights for chemicals, these fit in areas with limited clearance.

Made of FDA-listed materials, these sights can be used with food and beverage. They have sanitary quick-clamp connections for easy disassembly and cleaning.