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by jjeaff 1021 days ago
I have a CO sensor for an arduino that I haven't used yet that cost a few dollars. I haven't noticed in the manual any mention of expiration.
1 comments
p1mrx 1021 days ago
https://www.dfrobot.com/product-686.html > MQ7 datasheet > "Its service life can reach 5 years under using condition."
link