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smoke detectors
why does raw butane set off an ionising smoke detector ?
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smoke detectors
On Tuesday, February 18, 2020 at 12:39:51 PM UTC, Jim GM4DHJ ... wrote:
why does raw butane set off an ionising smoke detector ? How about cooked butane? Tim |
smoke detectors
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. 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. |
smoke detectors
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...was wondering if others had expeienced this...and as you say butane and propane sinks to the ground and that is why they are banned in high flats for obvious reasons......anyway a good few weeks ago I bought a small 15kg flogas bottle and left it out the back door when I went to use it the bottle felt very light and in the shack cabinet heater it has only lasted a quarter of the time I would have expected....so I am assuming another faulty valve on the bottle?..twenty quids worth of gas wasted....so....I am now manually triggering the valve on any bottles now and again that I buy and was thinking about sticking a baloon over the bottle outlet to act as a tell tale for leaks while in storage outside ...... |
smoke detectors
On 18/02/2020 17:18, 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. 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...was wondering if others had expeienced this...and as you say butane and propane sinks to the ground and that is why they are banned in high flats for obvious reasons......anyway a good few weeks ago I bought a small 15kg flogas bottle and left it out the back door when I went to use it the bottle felt very light and in the shack cabinet heater it has only lasted a quarter of the time I would have expected....so I am assuming another faulty valve on the bottle?..twenty quids worth of gas wasted....so....I am now manually triggering the valve on any bottles now and again that I buy and was thinking about sticking a baloon over the bottle outlet to act as a tell tale for leaks while in storage outside ...... what do you think?.... |
smoke detectors
Its a vapour probably at room pressures so I'd expect the current will
change in the ionised space. Brian -- ----- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! "Jim GM4DHJ ..." wrote in message ... why does raw butane set off an ionising smoke detector ? |
smoke detectors
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 -- Please don't feed the trolls |
smoke detectors
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.... |
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