3D Printer Enclosure Heat/Fire Detection

Does anyone have any suggestions for a practical/useful smoke or heat detector I could buy for my Lack table enclosure? I would like it to have a dry contact that I could use to cut power to my printer in the event of a fire.

I would think you want a combination of things, nest protect, smart switch, and something like ifttt and or home assistant. It sounds like a whole lot, but its not too hard to set it all up. Basically if nest protect triggers, it can kill power to the smart plug or switch. The hardest part is the checkout line with the nest protect.

Thank you for the suggestion. I think its a great idea but my wallet/wife has a different opinion. Still looking for something at the component level that I can integrate into what I have already setup with my raspberry PI.

Should be easy enough with your Pi.
A few relays, some plugs and some sort of electrical box to put it all in.
Pretty sure you can get a reading from a regular smoke detector to your Pi. Maybe direct from the buzzer output.

I read about a system call BlazeCut. Is expensive but as seen on videos works

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Hey Paul

Welcome to the Forum

I’ve heard of this before, cannot remember for the life of me where, Going to track it down and post the link

Found the link for the small enclosure system

The Kora enclosures available in our store have an optional smoke detector and fire suppression system addon.

Here is the unboxing video of Jason S. showing off the Kora:

Fire suppression: Kora Fully Automatic Fire Extinguisher - 3D Printing Canada
Heat Detector: Kora Electronic Heat Detector Unit - 3D Printing Canada

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The simplest, and cheapest solution to your question is a basic thermal fuse https://www.amazon.ca/Hilitchi-Circuit-Temperature-Thermal-Assortment/dp/B0719DHV9P/ref=sr_1_9?dchild=1&keywords=thermal+fuse&qid=1612547245&sr=8-9
The link points to a variety of fuses with different cut-out temperatures. Obviously you wouldn’t need the entire kit, but at $30 for 85 assorted fuses, you get an idea of how cheap they are. No, they won’t detect smoke, but if temperatures have risen to the point where combustion is taking place, you’ve long since exceeded the trip point of these fuses. Position it at the top of your enclosure and I’m going to trust that you’re competent in wiring as a poor wiring job will be a greater threat than the risk of the printer overheating.

Just stumbled across this post. Do you know of any examples where someone has set up something like this? It’s an intriguing idea but it’s not obvious to me how this would be wired up.


There are a few variations. the detector is triggered and that starts the fire suppression system.

Combined with a thermal shut off or even a thermostat if there were a fire the thermostat will cut power and the suppression system would trigger.