consists of a metal body, machined to have an internal chamber and one or
more front windows (on each side of the gauge).
On each window a
special high resistance plate transparent glass is applied with sealing
joint and metal cover plate hold by bolts and nuts.
The chamber is
connected to vessel with cross fittings and flanged, threaded or welded
ends. Usually, between the instrument and its connecting ends, valves are
fitted to consent shut-off piping and to disassemble the level gauge
without emptying the vessel. Drain valves can also be fitted to cross
To avoid leakage in case of glass breakage, safety
ball-check device can be provided in cross-fittings or shut-off
To protect glass surfaces from corrosive action of the process
fluid, Transparent Level Gauges can be fitted with CAF, Mica shields or
This kind of indicator is suitable
for liquids colorless and very fluid.