Which of the following is a sensor category used in irrigation systems?

• A. Wind
• B. Pressure
• C. Flow
• D. Rain

Answer: (A)

Sensors in irrigation systems gather information that helps decide when, how long, and how much to water. A wind sensor is used to measure wind speed because wind affects how far and how fast water droplets travel and how quickly water can evaporate from the soil surface. When wind is strong, controllers can shorten run times or skip cycles to reduce spray drift, water waste, and evaporation loss, making irrigation more efficient and safer for nearby areas. Other common sensor categories include rain sensors (which prevent irrigation after rain), flow sensors (which monitor the amount of water moving through the system and can detect leaks or blockages), and pressure sensors (which ensure the system operates at the correct pressure for uniform distribution). So wind is indeed a valid sensor category used to optimize irrigation.