Liquid Level Controller Sensor With Relay

A fully self-contained liquid level controller that automatically operates a relay output based on water level — filling tanks when low, stopping pumps when full. No microcontroller required. Simply set your high and low thresholds with the probes and the module does the rest, making it ideal for autonomous pump control in water tanks, aquariums, and industrial reservoirs.

🔹 Key Applications

• Automatic water tank fill and pump control
• Aquarium and fish pond water level automation
• Industrial sump and reservoir overflow protection
• Hydroponic system water level management
• Rainwater harvesting tank level control
• Underground tank pump automation

🔹 Why Choose This Module?

• Fully autonomous — no microcontroller or programming required
• Relay output — directly drives pumps, solenoids, and valves
• Adjustable high and low level thresholds
• Protects pumps from dry-running
• Visual LED indicators for water level status

🔹 Technical Specifications

• Operating Voltage: DC 12 V
• Relay Output: 10 A (NO/NC/COM)
• Sensing Method: Conductive probe
• LED Indicators: Level status LEDs

🔹 What's Included

1 × Liquid Level Controller Sensor Module with Relay

🔹 Pro Tip

💡 Use stainless steel or coated probes for long-term submerged use — bare copper corrodes in water. Place the common probe at the tank bottom, the low-level probe at your minimum fill point, and the high-level probe at your cutoff level. Test with a cup of water before final installation.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.