🌡️ Honeywell Ademco 5821 Wireless Temperature Sensor Review

The device seems a bit unstable. An error was reported even though the temperature was not out of range. I removed the battery, checked that the voltage is normal, reassembled it, it works fine. The problem with this device is RF related, they don't have diagnostics to tell you what's going on. It's just blind faith that it works right or not.

Bought for my brother who once had a drain pump failure and flooded his basement. I make a living installing alarm systems, so figuring it out wasn't difficult for me. Some people can have problems. FYI, on the Ademco 128FBP the time zone is also activated along with the water zone when the water zone is triggered. It's in the instructions, so don't be surprised.

I had two water incidents in three weeks and they were unrelated. I just installed a LYNX 7000 about two months ago and sadly didn't install any flood sensors. The flood cost more than $25,000. I bought two of these units - one for the basement and one behind the fridge. VERY easy to install and since they've updated these flood sensors, just connect two wires, program them twice into the main unit (once for flood and once for temperature - if you want both) then remove the sticker from the…