The Littelfuse LLC843F10P is a professional-grade conductive liquid level monitoring relay engineered for dependable fluid control in demanding industrial environments. Part of the proven LLC8 series, this 120VAC relay delivers precise low-level cutoff and pump control for tanks, reservoirs, and process systems — making it a trusted solution for HVAC, water treatment, and industrial liquid management applications.
Using probe-based conductive sensing, the LLC843F10P detects the presence or absence of conductive liquid and triggers an internal SPDT relay output when the programmed level condition is met. A built-in fixed time delay ensures stable, chatter-free switching, while the onboard LED status indicator provides instant visual feedback for fast diagnostics and system monitoring. Its compact chassis-mount form factor simplifies installation and saves valuable panel space.
Key Features
- 120VAC operating voltage — compatible with standard industrial control systems
- Conductive probe-based sensing for accurate, reliable liquid level detection
- Built-in fixed time delay for stable, chatter-free relay switching
- SPDT relay output for direct pump start, shutoff, or alarm control
- LED status indicator for at-a-glance system monitoring and diagnostics
- Compact chassis-mount design for easy installation in panels and enclosures
Applications
- HVAC condensate and fluid management systems
- Water treatment and pumping stations
- Industrial tank and reservoir level control
- Pump protection and low-level cutoff circuits
