INFORMATION PI 010
GUARD 201 &
GUARD 202 LEVEL CONTROLLERS
Liquid Level Controllers of types GUARD 201
and GUARD 202 are designed to control the
pump motors or solenoid valves with respect
to the liquid levels in containers, sumps
and overhead tanks. A wide field of
submersible pumps used in tube wells.
Control for tanks and containers in dairies,
breweries, chemical industries etc.
pumping sets for domestic and industrial
operation over a wide range of temperature,
pressure and concentration of liquid.
parts in the detection probes guarantee
completely unaffected by the shape, form and
capacity of container.
electrolysis occurs in the liquid because of
low alternating detection,
longer probe life.
robust design facilitates easy mounting even
in already existing installation.
controllers work in conjunction with
suitable probes which detect the electrical
conductivity of the liquid.The detection of
the conductivity actuates a relay. The
relay contacts may be used to control pump
motor or to activate any alarm etc.
GUARD 201 is
useful in the installations where the
START/STOP signal is to be generated
corresponding to one level 0nly. It may be
used to protect submersible pumps, in which
case it is necessary that the water level
should not fall below the maximum draw down
limit. It can also be used to protect a
house hold or an industrial pumping set from
the problems of dry running.
GUARD 202 is
suitable for the installations where
separate START/STOP signals are to be
generated for maintaining the liquid level
within two extreme limits. It is very much
useful for slurry and sewage control
installations, besides applications in
various chemical and other industries.
instruments have construction Suitable for
rear panel mounting. The conductivity
detecting circuit is completely encapsulated
in epoxy resin and is therefore unaffected
by moisture or dust. For additional
protection of a single or a set of
instruments, damp, dust and vermin proof
sheet steel housing can be supplied.
of suitable probes the dimensions of the
container and the environmental conditions,
viz., temperature pressure and chemical
composition etc., must be considered. Please
refer to our Product Information PI 009 for
selecting suitable probes. Before ordering,
all the possible details about the physical
and chemical characteristics of the liquid
in use must be furnished carefully.
: 230V + 15%, 50 Hz.
: 2 VA Approx.
One pair of changeover NO/NC Contacts,
5A, 250V A.C.
IN THE PROBE CIRCUIT : 4
ACCORSS PROBE & EARTH
: 15 V A.C. Max.
RANGE : Up to Max of 30 k
Ohms in the Probe Circuit
: 500 gm Approx.
: 96mm x 96mm X 55mm
: Please refer our Product Information
No. PI 009