Abstract:
I. Product And its uses
Apparatus for liquid level controllers falls
into the following main classes: (1) Mechanical,
(2) Pneumatic, (3) Electrical, (4) Electronics,
and (5) Nuclosonic. The simplest
example of the Mechanical Type is the ordinary
level gauge glass. This type of level gauge
consists of a vertical glass tube with a float
made up of rubber or plastic..
Float operated Dial Type: This type is
adopted for use on small tanks and engine
rooms. It is simple in principle consists of a
loat moving up and down with the liquid level
at the end of a privoted arm. An switch may
be fitted on a potentometer to give a control
action.
The choice of apparatus to test level, instruments
on site or to arrive at Data is governed
to a large extent by conditions and accordingly
selection is made.
(1) Dip and tape.
(2) Hook gauge.
(3) Displacing by liquid measure.
(4) Displacement by weight.
(5) Displacement by positive type flow meter.
(6) Test gauge.
