Description
The LLC2 Series is a dual-probe conductive liquid level control
designed for OEM equipment and commercial appliance
applications. Models are available for fill or drain operation.
Transformer isolated 12VAC is provided at the probes to prevent
electrolysis. A trickle current of less than 1mA determines the
presence or absence of liquid between the probes and common.
On adjustable units, the sensitivity adjustment allows accurate
level sensing while ignoring foaming agents and floating debris.
The LLC2 Series printed circuit board is conformal coated to
resist moisture and corrosion.
Operation
Drain (Pump-Down Mode): When the liquid level rises and
touches the high probe, the output relay energizes and remains
energized until the liquid level falls below the low probe. The
output relay then de-energizes and remains de-energized until
the liquid again touches the high probe.
Fill (Pump-Up Mode): When the liquid level falls below the low
probe, the output relay energizes and remains energized until
the liquid level rises and touches the high probe. The output
relay then de-energizes and remains de-energized until the liquid
level again falls below the low probe.

FEATURES BENEFITS
Isolated 12VAC probes Prevents scale buildup on the probes
Open PCB design Cost effective design for OEM equipment and
commercial appliances
Conformally coated PCB Protects against moisture and corrosion
Sensitivity adjustment Provides accurate level sensing while ignoring foam
or floating debris