Thanks Radu. Neither of those s/b contributors.

– Humidity in a sauna is low, typically between 5-50% RH. Given that humidity in a sauna is produced by ladling water on the stove rocks I’m not sure it’d even be possible to get it higher. I think they are confusing Sauna with a Turkish Bath or Steam Room.

– The A3 was placed low in the sauna where the temps never get above 60°c and rarely (or never) even above 50°c.

You can also see this in the temp and humidity of the image I posted above. Both are within the parameters of the sensor and more so within the parameters of the A3 that states ‘-20°c to +65°c’ (and which should likely be changed if the sensors have tighter parameters).

As I pointed out in my original post there appear to be two problems of the A3 providing quite erroneous data:

1) ALL CO2 readings are high. Even outside where the USEPA and my own devices are all giving readings of 390-425, the A3 is indicating over 600.

2) It is not correcting for temperature as every CO2 measurement device must do. Compare the CO2 and temp lines in the two images I posted. Whether this is supposed to be done by the sensor or in the A3 code it is not being done and my guess is that this affects every A3 device with this same sensor and possibly every A3.

Thank you,