Post A1GfBCBUVVdWn2Bmjo by russss@mastodon.social
 (DIR) More posts by russss@mastodon.social
 (DIR) Post #A1GfBBnjvodbbN4oiW by russss@mastodon.social
       2020-09-30T20:10:46Z
       
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       Started measuring CO2 concentration in my office and it's somewhat higher than I expected.I am not sure about the calibration of this CO2 sensor which has been sitting in a box for several years though.
       
 (DIR) Post #A1GfBC1v55yqJLi8oq by fribbledom@mastodon.social
       2020-11-16T18:27:34Z
       
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       @russss Which sensor are you using?
       
 (DIR) Post #A1GfBCBUVVdWn2Bmjo by russss@mastodon.social
       2020-11-16T20:10:57Z
       
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       @fribbledom It's a SenseAir K30 which someone sent me ages ago. (It still seems to be way out of calibration despite having an auto-calibration function which should correct it over time)There are cheaper options now though, such as these ones https://www.aliexpress.com/item/32916782044.html
       
 (DIR) Post #A1GfBCM7ry8xK1AHJY by fribbledom@mastodon.social
       2020-11-16T21:09:31Z
       
       0 likes, 1 repeats
       
       @russss A member from the local hackspace did an extensive test with various sensors.He recommends the SCD30 for accuracy and the Z14A for value for money.