Smart Irrigation

What Is an Irrigation Controller?

An irrigation controller is a device that directs when an irrigation system waters and how long it runs.

A controller panel takes schedule or sensor inputs and sends a control signal to a valve. The water supply pipe passes through the valve, not the controller. — Original conceptual diagram. Not to scale; actual equipment and site conditions vary.

How to Understand It

A basic controller follows programmed times. Weather-based and soil-moisture-based controls can adjust or interrupt watering using additional information. The controller sends commands; valves regulate water flow. An internet connection alone does not tell you how a controller decides whether watering is needed.

Related terms

Irrigation Zone
Soil Moisture Sensor
Weather-Based Irrigation

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What Makes an Irrigation Controller Smart

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