LLC2 Series - Open Board Liquid Level Control

Littelfuse Liquid Level Controllers
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.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Termination TypeMounting MethodDimensionsWeight (lbs/g)Compare
LLC24A2AN120VACIsolated SPDTTerminal blocks for up to #14 AWG (2.5mm2) wireSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4.00 x 3.00 x 2.00 in. (101.6 x 76.2 x 50.8mm)≅9.0oz (255g)
LLC24A2F50N120VACIsolated SPDTTerminal blocks for up to #14 AWG (2.5mm2) wireSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4.00 x 3.00 x 2.00 in. (101.6 x 76.2 x 50.8mm)≅9.0oz (255g)
LLC24B1AC120VACIsolated SPDT0.25 in. (6.35mm) male quick connect terminalsSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4.00 x 3.00 x 2.00 in. (101.6 x 76.2 x 50.8mm)≅9.0oz (255g)
LLC24B2F50N120VACIsolated SPDTTerminal blocks for up to #14 AWG (2.5mm2) wireSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4.00 x 3.00 x 2.00 in. (101.6 x 76.2 x 50.8mm)≅9.0oz (255g)
LLC26A1F25C230VACIsolated SPDT0.25 in. (6.35mm) male quick connect terminalsSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4.00 x 3.00 x 2.00 in. (101.6 x 76.2 x 50.8mm)≅9.0oz (255g)

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