Description
The LLC5 provides dual probe conductive liquid level control
in a convenient octal plug-in package. Models are available
for fixed fill or drain operation. Isolated, pulsed DC voltage
on the probes prevents electrolytic plating. Less than 1 mA
of current is used to sense the presence of conductive liquid
between the probes and common. On adjustable units, the
sensitivity adjustment eliminates false tripping caused by
floating debris and foaming agents.
Operation
Drain (Pump-Down Mode): When the liquid level rises
and touches the high level probe, the output relay and LED
energize and remain energized until the liquid level falls below
the low level probe. The output relay and LED de-energize and
remain de-energized until the liquid rises and touches the high
level probe.
Fill (Pump-Up Mode): When the liquid level falls below
the low level probe, the output relay and LED energize and
remain energized until the liquid level rises and touches the
high level probe. The output relay and LED de-energize and
remain de-energized until the liquid level again falls below the
low level probe.

FEATURES BENEFITS
Unique Probe
Protection logic
Probes are protected from scale build up through
pulsed DC signal between the probes.
LED status indicatior Visual indication of relay engagement in pump-up or
pump-down activity
Isolated 5A
SPDT contacts Allows control of loads for AC voltage