LLC5 Series Liquid Level Control

The LLC5 provides dual probe conductive liquid level control in a convenient octal plug-in package. Models are available for fill or drain operation. Transformer isolated AC 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 energizes and remains energized until the liquid level falls below the low level probe. The output relay then de-energizes and remains de-energized until the liquid again touches the high level probe.

Fill (Pump Up Mode): When the liquid level falls below the low level probe, the output relay energizes and remains energized until the liquid level rises and touches the high level probe. The output relay then de-energizes and remains de-energized until the liquid level again falls below the low level probe.

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