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 solutions, boric acid, and sodium bicarbonate.

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.

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

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

Seal the glass on your level indicator.

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

Mount these gauges on the flat end of a horizontal, cylindrical tank to monitor diesel fuel, fuel oil, or gasoline level.

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

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.

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.

Add a window to your high-vacuum system. With a pane of glass sealed inside a high-vacuum CF flange, these sights bolt onto vacuum chambers, tee fittings, and manifolds.

Built to withstand harsh chemicals.

Often used in cooling, lubrication, and process systems.

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.

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

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

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

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.

Align guide rails or lay pipe at specific angles from a flat surface.

These angle indicators come with a calibration certificate that's traceable to NIST and includes the test measurements that confirm accuracy.

These angle indicators also show level on the display.

Measure 40° front-to-back tilt in addition to side-to-side tilt.

Temporarily mount these indicators to a metal surface. They have four quadrants that each read any angle from 0° to 90°.

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.

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.

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

Permanently mount these rulers on machines, tanks, and walls to measure heights and depths.

These extra-thick rulers have a polycarbonate coating that resists wear from traffic and chemicals.

A hook grabs the edge of an object for easy alignment.

Rulers are marked with picas for working with type.

Take precise depth measurements in small holes and slots.

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

All gauges have zero-position memory, also known as absolute (ABS) positioning, which retains the measuring position when the gauge is turned off.

Measure depths up to 8" using connectable extension rods.

Check measurements at a glance.

These levels have a sturdy aluminum housing.

These fiberglass rods are nonconductive.