On May 10, 4:27*pm, Mathew Newton wrote:
On May 10, 1:47*pm, "Dave Liquorice"
wrote:

Are there any mains powered (battery backed), linked smoke detectors
that have an "aux ouput" that could be used to release a magnetic
catch on a fire door?

Don't all interlinked detectors have such an output by definition?


Some of them interlink by radio I believe?

Robert