The use of glass, especially at high pressures, is generally prohibited on safety reasons, and dark liquids usually results in frequent dismantling of the flow indicator to allow it to be cleaned..
The Focus 3 programme overcomes these two problems and concentrates on flow indicators where the transparent material is not in contact with the media.

PROBLEM No.1
Flow indicators at high pressures

1) High risk of leakage
2) High risk of glass breakage

PROBLEM No.2
Flow indication of dark liquids

1) Impossible to see the flow of liquid
2) Dark liquids can stain the inside of the glass.

THE SOLUTION

A) A brass or stainless steel body
B) Indicating ring linked magnetically through the body
C) Scale tube keeps dry and pressure free
D) Scale tube can be rotated for best viewing position
E) Flow indicating ring can be seen through 360 deg.