On one of my stops today, I had a repair order that the rain sensor we installed when we put the sprinkler system earlier this summer wasn't working. One of the techs had gone out there Tuesday and replaced the Hunter wireless sensor with a brand new one. He could not get the sending unit to send the signal unless it was 12" from the receiver. After spending some time and getting no where, he told the customer that I would make a visit when I could. So today, I stopped by and put in a new Hunter Wireless sensor and the furthest I could go before it stopped working was 10 feet. We install Hunter Wireless Rain sensors, but I had some Irritrol Rain Sensors in my truck from when a new guy at our distributer brought us the wrong ones. I put in the Irritrol brand and it worked like a charm. I seem to like this better than Hunter as it is always communicating with each other so you can tell if it's getting a signal or not. Have any of you guys experienced problems with Hunter Wireless Rain sensors? Oh...the distance from the sending unit to the receiver was only 30 feet.