I've used a "Sensaphone 1104" for years for my winterized place. It's saved me more than once so far. If has extra inputs that you can wire to alarms or motion sensors. You can call it and it will tell you the current temp too.
It has a high temp alarm too. I never bothered to set it and sure enough during that warm spell in March, it started calling to say the temp was 94.
|