From research it seems a temperature sensor is the best way to go but all the ones i ve found for smartthings cap out at 122f.
Attic temperature sensor.
4 5 out of 5 stars 1 759.
Ideal attic temperatures and humidity settings aren t always easy to maintain.
After sunset the attic temperatures continue this trend.
Amazon s choice for attic thermometer.
The temp stick from ideal sciences is a trustworthy wifi temperature sensor that will get the job done without any hassle.
Thermopro tp65 indoor outdoor thermometer.
If you do run into any problems the usa based company offers free email and phone support 7 days a week and the device also comes with a 5 year warranty.
Govee wireless thermometer hygrometer mini bluetooth indoor temperature humidity sensor with free data export temp humidity monitor with app alert for home greenhouse pet cigar humidor.
I m guessing in the neighborhood of 200f.
This won t work as i also had attic fans installed as part of the rebuild and they don t even kick on until 140f to cool the attic so obviously way above 140f is needed.
Where my attic temperature sensor is located may be slightly affected by heat loss from the house whenever the attic temperature falls below indoor temperature so the effect of night sky radiant cooling on the metal roof and attic coupling is to me not sufficiently measured.
Some thermometer offers you serve as a professional.
It s accurate reliable and user friendly.
Wireless temperature controller electric outlet thermostat with remote control built in temp sensor 3 prong plug heating cooling mode ops100 ots100 4 0 out of 5 stars 156 21 99 21.
This allows the fan to only run when it is necessary to vent hot air from the attic space extending the life of the motor.
Temperature sensor monitors the attic temperature and will turn on the fan when the temperature reaches 80 degrees and will turn off the fan when the temperature dips below 77 degrees.