3 ms·
I have a TIM10 that was once reporting negative CO2 levels one spring with the windows open. I'm not sure what I think about it. It's not a scam product by any
by Buttons840 4y ago
I have a TIM10 that was once reporting negative CO2 levels one spring with the windows open. I'm not sure what I think about it. It's not a scam product by any means, it can definitely tell when someone is in the room or a window is opened or closed. I needed the space and unplugged it awhile ago and just don't worry about CO2 levels currently.
- unlikelymordant 4y agoMy understanding is that some co2 sensors assume the minimum value seen over the last 30 days is 400ppm as a calibration. This could possibly explain a negative value if the sensor has been in higher co2 environment for some time, and is suddenly exposed to the outside.
- Buttons840 4y agoYou're right. The instructions say to place the sensor outside for a time to calibrate it, which I never did.
- lovemenot 4y agoDoes it require callibration?
- schmichael 4y agoYes. All consumer CO2 detectors I’m aware of take periodic calibration.
- bookofjoe 4y agoNot Aranet4
- schmichael 4y agoYes you do. Once a year: https://aranet.com/faq/ https://aranet.com/faq/ Their data sheet also advises calibration if used at “high elevation.”