In this type of level glass the qis contained between two smooth and transparent glasses.

The liquid level is shown by the different transparency of two phases.
This difference may be improved by adding a light source on the rear side of the level glass.
This type of transparency level glass can be employed in nearly ali installation, also when are required:
a) the interface observation
b) the liquid color observation
c) the glasses inner surface protection from corrosive liquid by Mica or Kel-F.

* Zoekterm: tubular, transparant, reflex level indicator