A
Alan Wakes
Guest
Anyone got a circuit for a gas alarm.
Thanks Alan
Thanks Alan
R
Rich.Andrews
Guest
"Alan Wakes" <Alan@wakesa.freeserve.co.uk> wrote in news:cj3mr7$98h$1
@newsg3.svr.pol.co.uk:
What kind of gas? Nitrogen? R-22? Propane? Gasoline?
r
--
Nothing beats the bandwidth of a station wagon filled with DLT tapes.
@newsg3.svr.pol.co.uk:
What kind of gas? Nitrogen? R-22? Propane? Gasoline?
r
--
Nothing beats the bandwidth of a station wagon filled with DLT tapes.
J
John Woodgate
Guest
I read in sci.electronics.design that Rich.Andrews <spmaway@ylhoo.com>
wrote (in <Xns956F49A464ADDmc2500183316chgoill@10.232.1.1>
about
'Circuit for Gas alarm', on Sat, 25 Sep 2004:
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
wrote (in <Xns956F49A464ADDmc2500183316chgoill@10.232.1.1>
about'Circuit for Gas alarm', on Sat, 25 Sep 2004:
UF6?
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
K
Ken Smith
Guest
In article <cj3mr7$98h$1@newsg3.svr.pol.co.uk>,
Alan Wakes <Alan@wakesa.freeserve.co.uk> wrote:
--
--
kensmith@rahul.net forging knowledge
Alan Wakes <Alan@wakesa.freeserve.co.uk> wrote:
A spark gap?
--
--
kensmith@rahul.net forging knowledge
P
Paul Hovnanian P.E.
Guest
"Rich.Andrews" wrote:
Actually, this isn't much of a problem. Most releases are accompanied by
their own audible warning.
--
Paul Hovnanian mailtoaul@Hovnanian.com
note to spammers: a Washington State resident
------------------------------------------------------------------
If you're not part of the solution, you're part of the precipitate.
Biological?
Actually, this isn't much of a problem. Most releases are accompanied by
their own audible warning.
--
Paul Hovnanian mailto
aul@Hovnanian.comnote to spammers: a Washington State resident
------------------------------------------------------------------
If you're not part of the solution, you're part of the precipitate.
Guest
Look here and then google the part number of the sensor you desire to
use. This gass sensor company has a near monopoly on the market for
many years and you can get the sensors from many sources at reasonable
cost. There are many such circuits on the web.
http://www.figarosensor.com/
Stepan
On Sat, 25 Sep 2004 13:02:22 +0100, "Alan Wakes"
<Alan@wakesa.freeserve.co.uk> wrote:
use. This gass sensor company has a near monopoly on the market for
many years and you can get the sensors from many sources at reasonable
cost. There are many such circuits on the web.
http://www.figarosensor.com/
Stepan
On Sat, 25 Sep 2004 13:02:22 +0100, "Alan Wakes"
<Alan@wakesa.freeserve.co.uk> wrote:
R
Rob
Guest
"Alan Wakes" <Alan@wakesa.freeserve.co.uk> wrote in message
news:cj3mr7$98h$1@newsg3.svr.pol.co.uk...
Anyone got a circuit for a gas alarm.
Thanks Alan
Alan,
Assuming its an internally generated methane mix, a lighted match and a
photodetector (masked from the match flame of course) may work. Acoustic
methods may also work - perhaps some DSP filtering. Conductivity could be
used but this will only detect gas emissions with concurrent follow through
and depending on the probe design could be uncomfortable for the user.
Otherwise try having a look at;
http://www.epanorama.net/links/measuring.html
Check out some catalogues or find sensors that detect the gas you are
interested in at manufacturers web sites & look at their app notes. Depends
quite a bit on the gas / the concentration / the measurement conditions &
the environment & the ........... etc
news:cj3mr7$98h$1@newsg3.svr.pol.co.uk...
Anyone got a circuit for a gas alarm.
Thanks Alan
Alan,
Assuming its an internally generated methane mix, a lighted match and a
photodetector (masked from the match flame of course) may work. Acoustic
methods may also work - perhaps some DSP filtering. Conductivity could be
used but this will only detect gas emissions with concurrent follow through
and depending on the probe design could be uncomfortable for the user.
Otherwise try having a look at;
http://www.epanorama.net/links/measuring.html
Check out some catalogues or find sensors that detect the gas you are
interested in at manufacturers web sites & look at their app notes. Depends
quite a bit on the gas / the concentration / the measurement conditions &
the environment & the ........... etc
I
Ian Stirling
Guest
Alan Wakes <Alan@wakesa.freeserve.co.uk> wrote:
All you need is a compressed air source, a spark plug and some metalwork.
Google for "valveless pulsejet".
180db+
Don't need a circuit.
All you need is a compressed air source, a spark plug and some metalwork.
Google for "valveless pulsejet".
180db+
J
John Woodgate
Guest
I read in sci.electronics.design that Ian Stirling
<root@mauve.demon.co.uk> wrote (in <4156cb26$0$17956$ed2619ec@ptn-nntp-
reader02.plus.net> about 'Circuit for Gas alarm', on Sun, 26 Sep 2004:
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
<root@mauve.demon.co.uk> wrote (in <4156cb26$0$17956$ed2619ec@ptn-nntp-
reader02.plus.net>
about 'Circuit for Gas alarm', on Sun, 26 Sep 2004:Add wings and Amatol and you have a cruise missile.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
R
Rich Grise
Guest
On Sunday 26 September 2004 08:07 am, John Woodgate did deign to grace us
with the following:
Thanks,
Rich
with the following:
Here's another Sign - the US has stealthed the buzz bomb.I read in sci.electronics.design that Ian Stirling
root@mauve.demon.co.uk> wrote (in <4156cb26$0$17956$ed2619ec@ptn-nntp-
reader02.plus.net>
Alan Wakes <Alan@wakesa.freeserve.co.uk> wrote:
[-- text/plain, encoding quoted-printable, charset: iso-8859-1, 2 lines
[--]
Anyone got a circuit for a gas alarm.
Don't need a circuit.
All you need is a compressed air source, a spark plug and some metalwork.
Google for "valveless pulsejet".
180db+
Add wings and Amatol and you have a cruise missile.
Thanks,
Rich
J
John Woodgate
Guest
I read in sci.electronics.design that Rich Grise <null@example.net>
wrote (in <jdH5d.7878$Ym1.2296@trnddc03> about 'Circuit for Gas alarm',
on Sun, 26 Sep 2004:
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
wrote (in <jdH5d.7878$Ym1.2296@trnddc03>
about 'Circuit for Gas alarm',on Sun, 26 Sep 2004:
I thought it was only Brits from SE England who called V1s 'buzz bombs'.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
R
Rich Grise
Guest
On Monday 27 September 2004 12:36 am, John Woodgate did deign to grace us
with the following:
heard somebody say it in a movie once.
Cheers!
Rich
with the following:
I learned it in the "how it works" things about the pulse-jet. And II read in sci.electronics.design that Rich Grise <null@example.net
wrote (in <jdH5d.7878$Ym1.2296@trnddc03>
on Sun, 26 Sep 2004:
Here's another Sign - the US has stealthed the buzz bomb.
I thought it was only Brits from SE England who called V1s 'buzz bombs'.
--
heard somebody say it in a movie once.
Cheers!
Rich