Displayed CO2 value between modules too high

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lukass2000
Posts: 2
Joined: 09 Aug 2022, 11:07

Displayed CO2 value between modules too high

Post by lukass2000 »

Hello,

I bought an additional indoor module a week ago for my Netatmo WeatherStation.
The difference between the CO2 displayes value of the base and the additional module is over 150ppm.
This can not be normal, or?

Thanks :)
lukass2000
Posts: 2
Joined: 09 Aug 2022, 11:07

Re: Displayed CO2 value between modules too high

Post by lukass2000 »

Extremely overpriced "hardware", but zero support :(
Great, keep it up netatmo :(
GEORGzer
Posts: 2663
Joined: 14 Jan 2014, 18:14

Re: Displayed CO2 value between modules too high

Post by GEORGzer »

Have you tried recalibrating said additional module?
https://helpcenter.netatmo.com/en-us/sm ... co2-sensor

It should be pointed out:
The accuracy of the CO2 sensor is ± 100ppm to 1000ppm and ± 10% for measurements greater than 1000ppm.
So two sensors could be apart up to 200ppm (one 100 up from the real value, one 100 down).


If the readings keep a steady 150 apart after the recalibration, you could request a manual offset done directly by the support through the helpcenter. Remember providing the serial numbers of your main station and the additional module as well as your account information.

Or request a replacement from your reseller and hope the new sensor reads closer to your main station.
Home: Weather Station (V3 + Rain & Wind Gauge, 3 additional Indoor Modules, Shield), Valves Starter Pack + 7 Valves, Video Doorbell
Office: Thermostat (V2), Healthy Home Coach, Smoke Alarm, 2 2in1 Sensors

Not a Netatmo employee
RetiredSteelWorker
Posts: 8
Joined: 04 Nov 2022, 13:03
Location: U.S. East Coast/Mid Altantic

Re: Displayed CO2 value between modules too high

Post by RetiredSteelWorker »

GEORGzer wrote: 26 Aug 2022, 09:25 It should be pointed out:
The accuracy of the CO2 sensor is ± 100ppm to 1000ppm and ± 10% for measurements greater than 1000ppm.
So two sensors could be apart up to 200ppm (one 100 up from the real value, one 100 down).


If the readings keep a steady 150 apart after the recalibration, you could request a manual offset done directly by the support through the helpcenter. Remember providing the serial numbers of your main station and the additional module as well as your account information.

Or request a replacement from your reseller and hope the new sensor reads closer to your main station.
There are two different specs listed for the CO2 sensor:
1:
https://www.netatmo.com/en-us/weather/w ... ifications
Accuracy: ± 50 ppm (from 0 to 1,000 ppm) or ± 5% (from 1,000 to 5,000 ppm)

2:
https://helpcenter.netatmo.com/en-us/sm ... ?query=CO2
Accuracy of the CO2 sensor: ± 100ppm to 1000ppm and ± 10% for measurements greater than 1000ppm.
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