On Friday 01 November 2013 17:07 DerbyBorn wrote in uk.d-i-y:

Any ideas on how to do a real functional test? I want to show a neighbour
that both of hers are working and have similar sensitivities. I won't want
to buy anything.


Cigarettes produce a certain amount of CO - but I'm not sure the
particulates in the smoke do CO detectors much good...

There may be a can of tester you can buy:

Perhaps:

http://www.safelincs.co.uk/detectaga...tector-tester/


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