RM22LG11MR Liquid Level Control Relay

Core Function: Uses conductive electrode probes to detect water levels in pools or tanks and automatically controls water pumps for filling or draining.

Terminal Definitions
Min, Max, C: Connect to three stainless steel liquid level electrodes;
A1/A2: Relay power supply (compatible with 24–240V AC/DC);
11/12/14: Changeover contact set for controlling the water pump.

Practical Applications
1. Automatic Water Supply Tank Refilling: Automatically starts the inlet pump when the water level drops to the "Min" (low) level; automatically stops the pump at the "Max" (high) level to prevent overflow.
2. Automatic Wastewater Tank Draining: Automatically starts the drainage pump when the water level rises to the "Max" (high) level; stops the pump when it drops to the "Min" (low) level to prevent dry running.
3. Alarm Output: Can output alarm signals during low-water or overflow conditions to protect the tank and pump.