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A comment on Indoor CO2 may reach levels harmful to cognition by the end of this century. Parent comment

Re:Indoor CO2 may reach levels harmful to cognition by the e... by acidburnNSA on Saturday September 19, 2020 @12:26PM (#24528553)
I have two of them, one inside and one outside. They both go down to roughly 400 ppm and the indoor one goes very high when it's all cooped up inside. The outdoor one fluctuates since I'm in an urban area. I believe they are accurate to within about 10%.

During the smoke event, they combined with my indoor/outdoor pm2.5 sensors have been extremely useful.

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Re:Indoor CO2 may reach levels harmful to cognition by the e... by throwaway3neu94 on Saturday September 19, 2020 @12:37PM (#24528632)
They should go down to 400ppm because the periodic autocalibration which is on by default assumes the lowest level seen in 24 hours is 400ppm.
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