[Stoves] Making testing equipment for CO and O2

[Crispin Pemberton-Pigott]

Dear Steve

>I use special 
>things called "Nernst Cells" in my professional work, 

Can these be calibrated accurately?

I am very interested in being able to make O2 and CO concentrations
available to a much wider audience of experimenters.

Thanks
Crispin

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