Which feature on an irrigation controller helps prevent watering during rain or freeze conditions?

• A. Motion sensors.
• B. Soil moisture probes.
• C. Time-only scheduling.
• D. Rain/freeze sensors.

Answer: (D)

Rain/freeze sensors are weather-aware features that pause irrigation when rain or freezing temperatures are present. They connect to the irrigation controller and override normal schedules to skip cycles, preventing water waste during rainfall and protecting plants and the system from damage due to frost. Other options don’t automatically respond to weather: motion sensors are aimed at security or activity detection, soil moisture probes measure how wet the soil is but don’t necessarily stop irrigation for rain or frost, and time-only scheduling simply follows a timer without any weather input.