Description
The Littelfuse LLC843F26P Liquid Level Control is an electronic monitoring relay that tracks fluid levels within a reservoir, tank, or vessel and a switching action when the liquid rises above or drops below a set point. It connects to external probes or float switches that send a signal to the relay, which then opens or closes the output circuit to activate or shut down a connected pump, valve, or alarm. Inside HVAC hydronic and steam heating systems, this relay oversees water levels in boiler vessels and feedwater tanks, cutting power to the burner or activating a makeup water valve when fluid drops to a threshold that potentially damage optimal boiler operation.
