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.

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.

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.

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

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

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

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

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.

These sights have a glass window.

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.

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

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.

Fasten the extended flange to tank walls.

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

Built to resist corrosion and last in harsh environments, these vertical rulers are iron with a porcelain-enamel finish. Mount them to walls and tanks.

Permanently mount these vertical rulers to walls and tanks.

Fold these vertical rulers for convenient storage and transport.

Also known as oil-gauging tapes, use these tape measures to check the level of oil and other fluids in deep, large containers such as tanks and vats.

Reach deep into small holes and slots for precise depth measurements.

Measure depth in dusty or wet environments--these gauges are rated IP67 for protection from dust and temporary water submersion.

These gauges come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

These gauges come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Measure depths up to 8" using connectable extension rods.