> This would be overkill but if you don't mind spending alot of
> money, try a
> LICOR.  Otherwise I would think any NDIR type would be fine.
> A sensor with
> some long term drift is not a big problem if you have some calibration
> gases, but then that would be overkill too.

The requirement is max 10% after a year. Calibration is probably
scheduled once a year. Thanxs for the suggestion (you and the others).

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products

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