Hunter Mini Clik Rain Sensor

The sensor uses specialized moisture-absorbing disks that expand when they get wet. Once they reach a certain level of saturation, they trigger a switch to shut down your irrigation system.

This specific model is a 'normally open' sensor designed for battery-powered DC timers that feature a dedicated sensor port. Please verify that your controller is compatible with normally open configurations before purchasing.

Yes, the sensor features adjustable settings that allow you to set the trigger threshold at 1/8", 1/4", 1/2", or 3/4" of rainfall. This lets you calibrate the system based on your local climate and soil drainage needs.

The moisture-absorbing disks are durable, but they should be kept clear of debris like leaves or dirt to ensure accurate readings. Periodically checking that the sensor is unobstructed will keep it functioning reliably throughout the season.

As the disks dry out, they shrink back to their original size, which automatically resets the switch. Once the disks are dry, your irrigation controller will resume its normal watering schedule.