The Planted Tank Forum - View Single Post - Affordable CO2 sensor?
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post #28 of (permalink) Old 11-11-2012, 03:05 AM Thread Starter
Children Boogie
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Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
There's a manual on calibration. I read briefly that it needed to warm up a little. I left it alone for 10 minute and it went down to ~800 ppm. The sensor was around a fan. I wonder if air movement or water movement shoots up the readings.

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