[PSUBS-MAILIST] DIY CO2 monitors

[Alan James via Personal_Submersibles]

 Jon, good idea testing out & familiarising with those important monitors. I intend to do the same. Alan
    On Friday, November 5, 2021, 06:36:23 AM GMT+13, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
  A couple of snapshots from my environment sensor operating inside my house.  The first is windows and doors closed, the second is with windows open.  Apparently I have a pretty tight house.
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