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.

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

The nylon body and window make these indicators shatter resistant.

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

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.

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

Seal the glass on your level indicator.

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.

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.

Easy to set up and use, these transmitters measure liquid levels using a standard float gauge.

FM and C-FM approved, these transmitters safely measure liquid levels where explosive gas or dust may be present. Set them at the bottom of your tank in applications that make traditional mounting difficult.

These sights have a glass window.

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.

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

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

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

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

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.

Install these switches through a tank wall.

Empty and fill your tank with a single device—these dual-level switches include two float switches that actuate at different levels. Mount through a threaded connection at the top of your tank.

Mount these switches from outside the tank through a threaded connection.

Install these switches into a threaded connection in your tank wall from outside the tank.

For use in locations with flammable gases and combustible dust, this switch is UL listed and CSA certified for Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G.

This switch mounts to the outside of your tank and detects chemical level through plastic tank walls by measuring the capacitance between the switch and tank contents; it cannot be used with metal tanks.

Use high-frequency sound waves to detect chemical level.

Mount these switches from outside the tank through a threaded connection at the top or bottom of your tank.

Use the included bracket to mount these switches to the inside of your tank.

Mount these switches through an unthreaded hole in your tank wall and secure with a nut from outside the tank.

Hang these free-floating switches in your tank for liquid-level monitoring that doesn't require installation through a tank wall.

Mount these switches from outside the tank through a threaded connection at the top or bottom of your tank.

For use in locations with flammable gases and combustible dust, this switch is UL listed and CSA certified for Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G.

Measure the level of conductive liquids without drilling a hole in your tank—these switches mount to the outside of the tank and track the capacitance between them and the tank’s contents.

Detect when oil rises on water, foam forms on beer, and tanks empty, triggering pumps and valves in food and sanitary lines. These switches are 3-A and European Hygienic Engineering and Design Group (EHEDG) certified since they’re easy to keep clean.

Install one of these relays to actuate equipment that has a higher current rating than your switch.

Mount these switches through an unthreaded hole in your tank wall and secure with a nut from inside the tank.

Commonly used in ice-making machines, these valves have floats that rest inside a clear plastic reservoir.

With a durable bronze body, these float valves can be used with water and hydraulic fluid.

Smaller than other float valves, these are sized for containers with limited space.

Use these float valves with water.

Made of stainless steel, these float valves have excellent corrosion resistance even when exposed to chemicals.

Combine these float valve bodies with floats and rods (not included) to create float valves that meet exact specifications.

If the primary float fails, the backup float kicks in and an alarm sounds to indicate float malfunction.

Automatically or manually start and stop flow in your line with these valve bodies, which attach to your actuator.

Measure volume in gallons without calculations.

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.

Fold these vertical rulers for convenient storage and transport.

Attach a plumb bob (sold separately) to the rope’s hook and lower it into your tank to take a measurement.

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.

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

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

Mount these levels to a wall or other vertical surface and they will indicate when you're level on the horizontal plane.

Stick these levels onto carts, mobile equipment, and other horizontal surfaces to make sure they're level before use. The adhesive backing forms a permanent hold with no drilling or fasteners required.

Slip these levels into a drilled hole.

The sturdy box-style housing has precision-machined leveling surfaces to ensure accuracy.

One of the horizontal vials is a pitch gauge that reads slope in 1/8" increments.

These brightly-colored levels are easy to spot.

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

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

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

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

These levels have a sturdy aluminum housing.

A magnet keeps this 90° level in place while you position posts and corners.

Keep an eye on leaks, overflow, and temperature changes near your equipment, even when you’re offsite.