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

Replace existing gauge glass or combine with valves and guard rods to build your own level indicator.

Seal the glass on your level indicator.

Monitor hydraulic fluid or oil level in pressurized applications, such as hydraulic systems where overflow is a concern.

Monitor hydraulic fluid or oil level in gear boxes, crank cases, and other reservoirs.

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.

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

Simultaneously monitor the hydraulic fluid or oil level and temperature in gear boxes, crank cases, and other reservoirs.

Detect sludge in your container; an alarm sounds when the indicator comes into contact with sludge.

These sights have a glass 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.

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

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

Fasten the extended flange to tank walls.

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.

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

For precise measurement of water, hydraulic fluid, or diesel fuel level, this gauge provides level readings down to 1/8".

Install these gauges through the top of your tank to monitor diesel, fuel oil, or gasoline level.

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

Measure liquid level with sound waves—these transmitters don’t come into contact with the liquid so you don't have to worry about fluid compatibility or contamination.

The low-profile body fits in areas with limited clearance.

The indicator moves when flow is present, so it’s easy to visually confirm flow from 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.

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

A large tubular window provides an unobstructed view of liquid color, clarity, and movement from multiple angles.

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.

Measure volume in gallons without calculations.

Permanently mount these vertical rulers to walls and tanks.

Fold these vertical rulers for convenient storage and transport.

Paste changes color when it’s submerged to indicate the gasoline level in a tank.

Use the pin, adjustable hook, or magnet to mount.