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Reblogged by kornel ("Kornel"):
kottke@botsin.space ("kottke.org") wrote:
This is the lowest price I’ve seen on SAF’s Aranet4 CO2 monitor (for measuring indoor air quality for Covid safety): $149 — that’s 40% off the regular price. https://www.amazon.com/exec/obidos/ASIN/B07YY7BH2W/ref=nosim/0sil8