Smoke detector that shuts power off

ChrisJ

Is there an off the shelf solution with a smoke detector that will shut off a circuit or even an outlet, like a piggy-black plug?

Curious what's out there as I'd like something for use with 3d printers (120V 15A) in case something elephant foots while I'm not there.

I'd rather something very smoke sensitive, like an Ionization smoke detector rather than heat triggered.

JUGHNE

The typical interconnected smoke det has a 3rd wire to activate the rest of the connected detectors.

I have never measured the voltage of that red wire when in alarm....never needed to.

It could energize a SPDT relay to open the NC contacts.

Just be cautious of the load of the 3-d for the contacts.

Maybe you want the PE smoke detector, thought to be better/quicker than the ion ?

ChrisJ

JUGHNE said:

The typical interconnected smoke det has a 3rd wire to activate the rest of the connected detectors.

I have never measured the voltage of that red wire when in alarm....never needed to.

It could energize a SPDT relay to open the NC contacts.

Just be cautious of the load of the 3-d for the contacts.

Maybe you want the PE smoke detector, thought to be better/quicker than the ion ?

In my experience PE is much less sensitive than ion.

JUGHNE

Ion were less money so were the common install.

Never looked into the PE.....but wait....no Radioactive parts!!

mattmia2

There are detectors for integration with alarm systems with dry contact outputs that could trigger a contactor or sequencer.

ChrisJ

https://support.firstalert.com/s/article/rm4

Looks like they make an RM4 relay that can do this.
Though I wish it was rated 20A.

mattmia2

You should probably trigger a sequencer or stack of sequencers if your load is anywhere near 15 a anyhow.

I'm not sure if cutting the power is going to make a huge difference by the time enough plastic is burning to trigger the smoke detector.

dko

Have you seen this one?

Made with 3D printer in mind

https://dockingdrawer.com/products/safety-interlock-outlet-with-smoke-and-heat-sensor?variant=40449767505963

Though the smoke sensor isn't UL listed

JUGHNE

Try an Ansul Hood system, it has electric dry contacts if activated.

ChrisJ

dko said:

Have you seen this one?

Made with 3D printer in mind

https://dockingdrawer.com/products/safety-interlock-outlet-with-smoke-and-heat-sensor?variant=40449767505963

Though the smoke sensor isn't UL listed

My other concern is the TR receptacle looks extremely cheesy.
No need to worry about the printer causing a fire if the outlet can do it for me.

ChrisJ

mattmia2 said:

You should probably trigger a sequencer or stack of sequencers if your load is anywhere near 15 a anyhow.

I'm not sure if cutting the power is going to make a huge difference by the time enough plastic is burning to trigger the smoke detector.

With how sensitive an ionizing smoke is directly over the printer, it would probably do a lot of good. I'd expect it to self extinguish if caught soon enough. Of course, I could be completely crazy too, but that's what I think right now.