oh, nice idea with temp sensor.

I have extinguishers all over the house, but hadn't considered a temperature sensor set to send alerts.

Do you have any recommendations?

What are you using for a homelab priced temperature sensor?

Homelab-priced sensor is the temp sensor in your server, it's free! Actual servers have a bunch, usually have one at intake, "random old PC" servers can use motherboard temp as rough proxy for environment temp.

Hell, even in DC you can look at temperatures and see in front of which server technican was standing just by those sensors.

Second cheapest would be USB-to-1wire module + some DS18B20 1-sire sensors. Easy hobby job to make. They also come with unique ID which means if you put it in TSDB by that ID it doesn't matter where you plug those sensors.

No more or less chance that really anything else connected to power to catch on fire. Just make sure RCD works.

Hell, some weeks ago my oven decided the lower heater's line is now connected to ground and blows fuses...

Our 8 racks in DC only had single event of something blowing (power supply) and aside of smell and fuse blowing nothing really happened

Servers are essentially metal boxes with a bit of glass-reinforced epoxy and some plastic inside so there is limited amount of stuff that can burn. UPS is probably bigger problem

For example the OVH datacenter fire was more of "stuff around servers was flammable" (they had wooden ceilings for some reason...) rather than "just" servers.

Cool how you use the acronym RCD and don’t expand it anywhere. Or any of the other homelab acronyms you used!

RCD is not a homelab acronym, its a type of circuit breaker.

"Residual current device". It detects current leaking to ground; essentially it prevents you from killing someone by throwing a toaster into the bathtub.