Bi-color level gauges are a variant of transparent level gauges, manly
used to measure very high pressure water steam.
These gauges feature two flat transparent glasses which, together with
the gauge body, form the chamber containing the fluid. In this case, a
special red and green illuminator is mounted on the rear side of the
gauge body in order to obtain a double illumination system.
- Red light for the steam
- Green light for the liquid