Rare Smoke Detectors

Wait, really? Which probe model and what goofball found it?

Iv’e never seen this before

Sorry Sidney, didn’t know you already found this.

Quite an interesting combination of new & old!

Oh? Alright, huh…

What Probe unit is that?

I have: that’s a Detection Systems DS200HD mounted on either a 2-wire MB200-2W or 4-wire MB200-4W base, which is likely 80s-era & is very rare to find today.

Detection Systems DS200HD

It’s an Unknown probe model! It uses the Probe 107 shell but has probe 101 vents.

Found my 5th SS749AC/SS729AC today! Sadly not operating so I’m still on the hunt for another :face_with_diagonal_mouth:

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Photoelectric Elevators!

Oh? Huh…

Wow, really? Is that that model of AC-powered First Alert detector with that kind of design & a solidly-glowing green LED? (that I know I’ve seen before but otherwise do not know the identity of)

No! Are you talking about the Canadian 4919’s and 86RAC’s by chance?

I have no idea, I just know I’ve seen an AC-powered First Alert with the “SA76RC/SA67D” design & a solidly-glowing green power LED.

This one’s a 1970s BRK alarm that was recalled because it started fires. They started fires because of an underpowered resistor. Notice how this one doesn’t have any visible vents on the side that those legacy First Alerts do have. That’s how you know that it’s an SS749.


Oh btw @V.S.A.M I found a Probe-based Sears one night, thought it was quite cool. However, I found it BEFORE A FREAKING P4010 RRRAAAAAAAAAAAAARRGHH!

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Oh? Okay I guess (once again, no idea how you found that out, but okay I guess). Does the SS749 have a solid green LED as I’ve mentioned?

As I believe I’ve already had to ask before, why is that a big deal?

The P4010 is much more common than a Probe Sears. That’s why.


What in the poop loop-de-loop kind of alarm is this? I’ve never seen one of these alarms before.

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Well, yeah, but I’m not sure that’s worth getting worked up about.

That’s a Sunbeam Centurion-series smoke detector (not sure of the exact model, though I’m pretty sure it starts with “45-”), & yes, that is a rare one alright!

Ah, yeah. I just saw it on a livestream and it was previously found.

That’s was found by my friend Kingsnake.

Yes the SS749/729AC is currently one of my most wanted alarms!