Perhaps slightly off-topic, but certainly has applications in the coffee world as well. Getting water to exactly 202°F while I get ready for work? Priceless.

https://www.kickstarter.com/projects/me ... every-time

It is interesting. I already have a sous vide setup and a variable temp Bonavita kettle would be much cheaper, but if the reviews turn out well on it I could see putting one on my stove. I wouldn't take a Kickstarter risk on this product but I might buy it after it's been in use a while.

Cool device to control gas gas powered boiler, even a gas fired roaster see how this will turn out

Interesting, while building my PID sous vide I thought about this possibility and it's nice to see it becoming reality. i'm interested in a couple for my gas stove