Littelfuse LLC14B60AX Liquid Level Control 120VAC Fill Operation 60s Delay

The Littelfuse LLC14B60AX is a single-probe conductive liquid level control designed for OEM equipment and commercial appliance applications. This open board unit operates on 120VAC power and is configured for fill (pump-up) operation with a fixed 60-second time delay to prevent rapid cycling of the output relay.

Key Features:

• Single probe conductive sensing technology with 1 to 250 kOhm sensing range
• Fixed 60-second time delay prevents rapid relay cycling and extends equipment life
• Isolated AC voltage at the probe prevents electrolysis in conductive liquids
• Low trickle current of less than 1mA safely detects liquid presence or absence
• Conformal coated printed circuit board resists moisture and corrosion
• Electromechanical relay output for reliable switching
• Surface mount configuration for flexible installation

Operation: In fill mode, when the liquid level falls below the probe, the 60-second time delay begins. After the delay expires, the output relay energizes and remains energized until the liquid level rises and touches the probe again. The relay then de-energizes and remains off until the liquid level falls below the probe once more.

This control is ideal for automatic tank filling, water level management, and liquid level sensing in commercial equipment where reliable, low-maintenance operation is required.