Monitor hydraulic fluid or oil level in pressurized applications.

These flexible indicators bend to follow the contours of a tank.

These indicators mount from the outside of your tank.

The nylon body and window make these indicators shatter resistant.

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

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

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.

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

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

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 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".

Also known as level loggers, level sensors, and pressure transducers, these transmitters sit at the bottom of your tank in applications that make traditional mounting difficult.