On 18/02/2020 17:33, Tim+ wrote:
Jim GM4DHJ ... wrote:
On 18/02/2020 13:08, Brian Reay wrote:
On 18/02/2020 12:39, Jim GM4DHJ ... wrote:
why does raw butane set off an ionising smoke detector ?

I'd be surprised (and worried) if it got near to one. Butane is denser
than air and tends to 'settle' near the floor. If there is enough in the
room that it reaches the smoke detector (which is normally mounted high
up), there is a LOT of Butane around.

I assume this is in your caravan? You should have 'vents' in the floor,
especially where there is Butane equipment (ie possible leaks). The idea
is, any Butane which has leaked 'sinks' out of the vents.Â* That is why
LPG and Boats can be a problem- you can't have vents! Boats should have
LPG detectors but I'm not sure how they work.


Yes it was last year at the van and the smoke alarms kept going off when
the cabinet heater was not on...never had any trouble before or
since.....I blamed a faulty outlet valve on the bottle.....didn't smell
any gas so I just assumed that a very small amount can set of an
ionising detector.


Are you absolutely sure its not a gas detector?

Tim



em yes I have an ionising smoke detector and an co2 detector and I
haven't even changed the ionising smoke one for an optical yet which are
great for burnt toast at home..... there was no other reason for the
smoke detector to go off...it had to be the raw butane ....did a number
of tests before I rejected the bottle.....must have been a very low
level leak as I didn't smell it and I felt OK ...strange
....I have no sense of thirst for some reason but a very good sense of
smell....