Re: CO detection

[Harmon Seaver <hseaver@cybershamanix.com>]

   Well, the Autologic unit I posted about before that advertised "custom
programming" is out of the ballpark. $5100 for the 5gas, $4500 for the 4 gas
unit, over $500 just for the software. And they use your own PC.
   I guess I'm a bit apalled at the costs of these things. Seems a bit of a
ripoff if all the computing power is in the PC, as I know I've seen just CO
probes for quite cheap.


Harmon Seaver wrote:

>         Yes, I have a CO alarm, don't know whether or how it could be modified
> to give gas amounts. You still have to have some sort of device to read that
> data. If you do a google search on "gas analyzer", there's a lot of stuff out
> there.
>      For example, here's a place to download demo gas analyzer software for
> the PC:
> http://www.autologicco.com/allproducts/download.shtm
> This company sells sensor units to use with a PC, don't know the price, but I
> emailed them for info. It also says that they do "custom software development"
> in the gas analyzer field, so, depending upon cost, of course, this might be a
> better answer.
>     There could be many other -- perhaps cheaper -- solutions. I got 12,700
> hits on "gas analyzer" and 2680 hits on 'portable "gas analyzer"', and have
> only looked at a few so far.
>
> elk wrote:
>
> > Thanks AJH;
> >
> > >From what you write, the relatively cheap car CO analyzer seems to be very
> > specific to vehicle exhaust.
> >
> > Scratch that one.
> >
> > Now- haven't I seen household CO alarms- similar to those lithium-battery
> > powered disc-shaped smoke detectors? I might be mistaken...........
> >
> > elk
> >
> > --------------------------
> > Elsen L. Karstad
> > elk@wananchi.com
> > www.chardust.com
> > Nairobi Kenya
> >
> > ----- Original Message -----
> > From: "AJH" <andrew.heggie@dtn.ntl.com>
> > To: <stoves@crest.org>
> > Sent: Friday, November 23, 2001 2:22 AM
> > Subject: Re: charcoal briquettes- 'vertical holes'
> >
> > On Thu, 22 Nov 2001 09:33:48 +0300, "elk" <elk@wananchi.com> wrote:
> >
> > >
> > >We've talked and talked about CO metering on this list, but none of our
> > technically-inclined members have >come up with a workable and affordable
> > instrument design yet. What's up guys? With all the household CO >meters
> > that are on the market in NorAm and Europe, we should be able to cobble
> > something together that's >pretty cheap and robust... and battery powered.
> > Once it's designed and tested I bet we could get funding >from Shell or
> > similar to get a couple dozen meters out in the field through this list.
> > THEN we can start >solving a few mysteries and educating people in a proper
> > hands-on manner. We all agree that seeing is >believing!
> > >
> >
> > Here a flue gas combustion analyser seems to cost about GBP1500, a 12v
> > powered hot wire system for monitoring CO in car exhausts costs GBP50.
> > The problem is the manufacture will not divulge the algorithm which is
> > used to display the CO percentage. Typically it will display 2% CO in
> > ambient air, which suggests the calibration is to do with the thermal
> > conductivity AND/OR specific heat of oxygen and CO, presumably there
> > being a mutual inverse probability or both appearing together (unless
> > the car is not sparking on one cylinder). Gas sampling is propelled by
> > fluctuations in exhaust pressure.  It is one of those things I did not
> > have time to show Ronal in his brief visit, my colleagues have not let
> > me paly with their flue gas analyzer for comparison as its use is
> > restricted to lab personnel and not oily erks :-(.
> >
> > AJH
> >
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> --
> Harmon Seaver
> CyberShamanix
> http://www.cybershamanix.com
>
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--
Harmon Seaver
CyberShamanix
http://www.cybershamanix.com



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