Question:
I was looking for a mains powered smoke detector with a loop facility for an alarm accept switch. The alarm accept switch is to be a non latching switch. Don't want to annoy the neighbours when the toast is burnt.

Answer: Q: I was looking for a mains powered smoke detector with a loop facility for an alarm accept switch.

A: I have a fairly standard wired intruder alarm with fire zoning capability. I have this wired to mains smoke detectors. I have 2 ionisation types, 1 optical and a heat detector for the kitchen. I have never had a false alarm. Not once.

The devices are Kidde Slick, which look modern and are round (no careful alignment like square ones!). They are available in Alkaline backup, rechargable backup and no backup (don't use those). There is a surface mounted base with relay, which I wired up to an intruder alarm zone configured for 24h fire. This will be configured to ring the external sounder with a distinctive tone when I get round to installing the bell box. I didn't actually use the surface mounted base that comes with the relay, as I didn't want the things protruding so much from the ceiling. I detached the electronics from the base and installed them in a standard surface mount plastic box next to the intruder alarm along with a switch to turn off the interconnect for testing. All mains supplies for alarm systems are from a dedicated way on the consumer unit. IIRC, there was some sort of jumper setting for latching operation on the relay board.

Q: Don't want to annoy the neighbours when the toast is burnt.

A: Indeed, this very morning the system went off with burnt toast. But then, it had been on fire and subsequently filled the house with dense smoke. The toaster had got jammed down. I still can't believe they design toasters so that in the event of a jam (extremely common occurance) they set themselves on fire (extremely serious consequences).

http://www.tlc-direct.co.uk/Products/KDSMK23R.html http://www.tlc-direct.co.uk/Products/KD1SF23slash9HI.html http://www.tlc-direct.co.uk/Products/KD2SF23slash9HI.html http://www.tlc-direct.co.uk/Products/KD3SF23slash9HI.html