Armored Level Gauge

Sigma armored (flat glass) level gauges give a reliable, accurate and direct view of the liquid inside process tanks, pressure vessels and other containers. They are built to the ruggedness and material mix industry demands, so the same design serves everything from plain water to highly corrosive chemicals.

How it works

The gauge chamber is connected to the vessel through two Sigma gauge valves, one at each end. In normal operation the valves stay wide open, the pressure in the chamber equalises with the vessel, and the liquid shows its true level through the glass window over the full visible length.

Reflex gauges show the liquid dark against a bright vapour space, which makes clear liquids easy to read. Transparent gauges let you see the liquid itself, which helps with interfaces and coloured liquids.