I'm am refurbishing some old CO2 incubators. I would like to test the precision of the CO2 sensor. There is a sample port on this incubator.

What sorts of methods are commonly used to measure CO2 in these incubators?

Strangely, the manufacturer of the incubator makes no recommendations.

I need to be able to report the measurement as a percentage.

  • 2
    $\begingroup$ I would presume calibrating it with a known gas concentrations is what they do at the factory. In my lab, the calibration is done by the servicing company. $\endgroup$
    – March Ho
    Commented Aug 12, 2015 at 12:14
  • $\begingroup$ Chemistry SE might be able to come up with a simple way get some known concentrations. $\endgroup$
    – jzx
    Commented Aug 13, 2015 at 10:21

1 Answer 1


Found this:


Probably what I need


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