Sauna controller have CE.

Overheating protection is a temperature sensor up to 125 degrees.

There is no door sensor.

You can control from anywhere in the world as long as there is internet access, of course, you need a router at the location where the sauna driver is installed.

It can be built into the wall of the sauna, but it can be controlled via wi-fi, color-lit control panel - the color changes as the temperature rises.