Can anyone identify my smoke alarms?

[Andy12J]

My mains-powered smoke alarms are all going haywire, I presume because one of them needs replacing. They ll all go off for 10-15 minutes and I have to turn them all of manually to quiet them down.

There’s one in the loft (pictured) which got me thinking whether they might be heat alarms instead - the temperature up there has to be close to 50c I d have thought.

Annoyingly, there’s no serial number or make on them, so does anyone know what this is?

Incidentally, these are ten-year sealed jobbies that you have to replace once the battery runs out. Best before date on this one: August 2031. Who thought that was a better idea than swapping out a 9v battery every other year or so?

[Harpoon]

Google Lens says the first picture is:

FireAngel SM-SN-1 Mains Powered Multi-Sensor Smoke Alarm.

The second picture:

FireAngel HM-SN-1 Mains Powered Thermistek Heat Alarm

[Andy12J]

Thank you! If I wasn’t so clueless with tech I could have checked that myself. Noted for next time.

£50 each at Screwfix though? Each?

[Simpo Two]

Andy12J said:

Who thought that was a better idea than swapping out a 9v battery every other year or so?

The sales manager...

Plenty of other makes to be had if you don't like those.

[OutInTheShed]

I think the smoke sensors only have a 10 yr life anyway?
I had to replace ours a while back.
What's the difference between the expensive ones and the £20 ones?


The heat sensor in the kitchen has no shelf life but it does look old now!
You can test that one with a hairdryer.

[768]

OutInTheShed said:

I think the smoke sensors only have a 10 yr life anyway?

Oh, bks. That's another job then.