An Automatic Water Level Controller is a device used to monitor and control the water level in tanks, reservoirs, or other storage systems automatically. It typically uses sensors and a microcontroller or relay-based circuit to operate a water pump, ensuring the tank remains full without overflowing.

Main Components:

1. Water Level Sensors – Detect different levels of water (e.g., empty, half, full).
2. Control Unit – Microcontroller (like Arduino, PIC, or 555 timer circuit) or relay logic.
3. Relay Module – To control high-voltage devices like water pumps.
4. Water Pump – Motor controlled by the system to fill the tank.

How It Works:

• When the water drops below a certain level (e.g., low-level sensor), the controller switches on the pump.
• When the water reaches the desired level (e.g., high-level sensor), the controller turns off the pump.
• This avoids dry running of the pump and prevents overflow.

Advantages:

• Saves water and electricity.
• Prevents overflow and dry-run damage.
• Can be used in homes, industries, and agriculture.

Basic Circuit Diagram (Optional):

I can provide a simple schematic or Arduino code example if you’d like—just let me know your preferred approach (relay-based, Arduino-based, etc.).