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The rain and freeze sensor for sprinkler controllers is engineered to automatically detect rainfall or low temperature conditions and turn off a sprinkler controller until normal watering conditions return. It has water-absorbing disks which expand when wet, causing the controller to suspend watering. When the disks dry out and contract the controller returns to the normal watering schedule. It is adjustable so you can change the threshold for triggering a delay. It uses a thermistor to detect low temperatures and similarly suspends and restarts watering. You will typically mount the sensor on an eave or other open-air area, and a wire runs up to 30 feet to the rain sensor port of the irrigation controller. Compatible with 24 VAC controllers from Orbit, Hydro-Rain, and other major irrigation brands.
From the Manufacturer
The Rain and Freeze Sensor prevents your automatic sprinkler system from watering during a storm. The rain sensor is adjustable to accommodate rainfall from 1/8 In. to 1 In. The freeze sensor reduces hazards and damage to your pipes from freezing water.
Brian Simpson
Reviewed in Australia on September 23, 2024
Plugged straight into my inkbird system. Love it.
D.H.
Reviewed in the United States on July 31, 2024
Does the job, easy to install and adjust, and simple to connect to Rachio 3. I love seeing notifications in the app that the rain sensor stopped irrigation, and I can see when it dries out and irrigation can resume.
C. L.
Reviewed in the United States on June 26, 2024
Super easy to install and set up. I mounted mine on the top Of my wooden privacy fence. Its adjustable for amount of rainfall.. I installed mine on a Hunter sprinkler timer.. no more overwatering my lawn when it rains or has rained in the past few days.. highly teccomend this product.
Richard L. Elpers
Reviewed in the United States on December 15, 2024
Temp/weather eventually destroyed original. Easy to install.
RBurgie
Reviewed in the United States on November 5, 2024
Limited instructions for adjusting.
maldasi
Reviewed in Spain on October 6, 2024
Funciona perfectamente.Instalación muy sencilla y una excelente relación precio/calidad.Recomendable.
solare
Reviewed in Canada on October 25, 2024
Rain detecter.
Seawinds
Reviewed in the United States on October 17, 2024
My old rain sensor died after 10 years. This rain sensor worked fine. Price was reasonable. Fast delivery.
federico
Reviewed in Italy on October 11, 2024
Facilità di installazione - prodotto completo di tutto
Customer
Reviewed in the United States on April 10, 2024
This is my 3 or 4th one I installed. My Hunter Control came with a wireless rain cut-off sensor that never worked. To replace it it would have caused my ~$150+ This baby was under $20 and it will be good close to life time. I like the hardwire options and avoid all the drama of wireless/WIFI sensors.
Lee Fleishman
Reviewed in the United States on January 23, 2023
I am a Home Automation dealer/installer/programmer. I added this sensor to my own home's pretty elaborate automation system as a means to prevent the system from adding water to the swimming pool when it rains. Works like a charm (but had to add a small relay to invert the sensor's "Normally Closed = Dry" operation...no big deal). As for the sensor itself, its construction is decent, and it's very simple to adjust how much rain it takes to trip the sensor. It also has an adjustment that affects how long it takes for the sensor to dry out (and reset) after the rain stops. All in all, I'm very happy with this sensor. I'm pretty certain it would work well for its intended use with a landscape irrigation controller.
Tano "Maverick" Malagan
Reviewed in Mexico on August 24, 2019
Cumple su Función, muy bueno para las épocas de lluvia.
R. Lawrence
Reviewed in the United States on July 28, 2011
The rain sensor is hard-wired. There is also a model which is wireless. The hard-wired unit is wired to interrupt the electrical current going to the irrigation zone solenoids. There is no way to override it, so if it rains enough to trip the switch you have to either go up and re-adjust it, or just do without watering until it dries out. This can be bypassed by the user just installing a simple switch between the wires that go to the rain sensor, essentially bypassing the switch.The switch does not contain a float mechanism. It works by rain causing expansion of some fibrous washers which in turn presses a micro-switch to interrupt the electrical current to the irrigation valves solenoids.There are two adjustments on the switch- one for how much rain it takes to trip it and the other for how quickly it will be allowed to dry after it gets wet. There is a calibration on the side for how much rain is needed to trip it.Overall the switch has worked quite well. I set it for 1/4 inch of rain when I installed it and that has been about right. I've only had one tim when it didn't come on and I wanted it to, and one time that it didn't turn off, probably because the switch didn't have time to react to the rain.The system obviously can't predict if it is going to rain later in the day which would eliminate the need for the irrigation system to run earlier in the day. That is up to the user and there is a system delay button on the irrigation controller to do that.Overall a 4 star rating. I'd give it 5 stars if it had a way to manually bypass the switch. I believe that the wireless sensor does have that feature. If I had known about the wireless sensor I would have gotten that, assuming it wasn't too costly. Not sure how reliable the wireless one is or how often one has to change the batteries. Probably worth a try!
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