Description
The Littelfuse LLC44B30A is a liquid level control part that operates on 120V to help in controlling and regulating the levels of liquid in HVAC systems. It uses a single-probe resistance sensor which works by switching on when the liquid comes into contact with the probe and this is followed by a preset 30 seconds time delay to avoid frequent cycling of the pumps. This control is especially useful for constant monitoring of condensate tanks and sump pumps to ensure that the system is reliable and efficient. Some of the features are an SPDT output with isolation, adjustable sensing resistance ranging from 1kΩ to 250kΩ, and protection against surge current.
