[chbot] Oxygen / Argon sensor

Trevor Wignall zl3adz at gmail.com
Sun Jun 7 13:37:48 BST 2020


A slightly more refined technique used in previous centuries is a canary in
a cage. When it keels over, you know it isn't breathing oxygen.

Argon is heavier than air,, but not dramatically so (40 rather than 28 for
N2 and 32 for O2), so you could get significant mixing of the argon with
room oxygen. (Good for the canary, not so good for your device.) Of course
if the argon is also cold... Perhaps that is the trick - cool the argon and
use a thermometer or thermocouple.

Good luck.
Trevor

On Sun, Jun 7, 2020 at 11:41 PM Marshland Engineering <
marshland at marshland.co.nz> wrote:

> Car O2 sensors have to be hot to work. There are narrow and wideband units.
> Wideband needs a lot of electronics to get reasonable readings out.
>
> Simple method, place head in jar, if you can breathe - oxygen, if not
> argon.
>
> Cheers Wallace
>
>
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