Water Level Indicators | McMaster-Carr

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.

Flexible Easy-View Liquid-Level Indicators

Bend these flexible indicators around the contours of your hydraulic fluid, oil, or water tank. Because their plastic resists shattering, they don’t need a protective shield like other liquid-level indicators, so you can check your tank’s level from any angle.

Build-Your-Own Level Indicators with Shut-Off Valve

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

Level Indicators with Shut-Off Valve

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

Pop-Up Full-Tank Indicators

Avoid overfilling—these indicators pop up when your tank is almost full.

Liquid-Level Gauges

Vertical-Mount Liquid-Level Gauges for Tanks

For use with water, hydraulic fluid, and diesel, install these gauges through the top of your tank.

Chemical-Resistant Vertical-Mount
Liquid-Level Gauges for Tanks

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

Precision Liquid-Level Gauges for Tanks

Using inches or centimeters instead of common levels, such as full or empty, these gauges are more precise than standard gauges when measuring liquid levels. They work with water, hydraulic fluid, or diesel.

Liquid-Level Gauges for Drums

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

Sights

These sights have a glass window.

High-Visibility Sights

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

Easy-View Sights

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

Shatter-Resistant Sights

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

High-Pressure Sights

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

High-Temperature Sights

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.

Easy-View Flanged Sights

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

Through-Wall Sights

Mount these sights from the inside of your tank and secure with a lock nut.

Press-Fit Through-Wall Sights

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

Flanged Sights

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

Weld-On Sights

Weld these sights to single-wall tanks.

Sights for Quick-Clamp Sanitary Tube Fittings

Monitor food, brewery, chemical, pharmaceutical, and biotech processing lines with these sights that attach to quick-clamp fittings for fast installation and easy removal for cleaning.

Liquid-Level Indicators

Easy-View Oil-Level Indicators

Flexible Easy-View Liquid-Level Indicators

Build-Your-Own Level Indicators with Shut-Off Valve

Level Indicators with Shut-Off Valve

Pop-Up Full-Tank Indicators

Liquid-Level Gauges

Vertical-Mount Liquid-Level Gauges for Tanks

Chemical-Resistant Vertical-MountLiquid-Level Gauges for Tanks

Precision Liquid-Level Gauges for Tanks

Liquid-Level Gauges for Drums

Sights

Sights

High-Visibility Sights

Easy-View Sights

Shatter-Resistant Sights

High-Pressure Sights

High-Temperature Sights

Easy-View Flanged Sights

Through-Wall Sights

Press-Fit Through-Wall Sights

Flanged Sights

Weld-On Sights

Sights for Quick-Clamp Sanitary Tube Fittings

Chemical-Resistant Vertical-Mount
Liquid-Level Gauges for Tanks