Looking for feedback on Thermal Safety Shutoff

Hi.

I am looking to learn from anyone who has had experience in the field where either they used a thermal safety shutoff used to shut off automatically and control hazardous conditions -- or was in a situation where this kind of shutoff would have been helpful. An example of the thermal shutoff I had in mind is described at http://assuredautomation.com/firesafe/index.php

I am also interested in knowing any other options you would use.

Thanks in advance for your help.
Jean