Outdoor CO2 Reading Jumping - high heat above 92 deg outside

• 

  razbaz

  Posted: 30.07.2025 16:29

  Modified: 13.08.2025 12:12

  I'm using the Aranet4 to measure my outdoor air CO2 levels, just outside my house.

  I'm down in FL, most of the early and late day & night it reads in the low 400's ppm, as would be expected for background CO2 levels.

  However, right around noon, in the summer here, when it gets above 92 deg, it jumps to 570ppm.

  I'm wondering if the sensor is erroneously jumping to a higher reading or if there is something going on in this area at noon and increasing the background CO2 by 100+ppm all of a sudden?

   

  Thanks

   
• 

  aranet-techsupport

  Posted: 31.07.2025 11:15

  Hi!
  
  It might be that people are driving a lot for lunch and the Co2 rises.
  Is your Aranet4 placed in direct sunlight? 
• 

  razbaz

  Posted: 31.07.2025 15:38

  I hadn't updated my firmware in a very long time, I updated it last night, it's showing consistent readings now. Outside shows mid to low 400's like it should.

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