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| Best Seller  | Extech Instruments Handheld Indoor Air Quality Carbon Dioxide Meter CO240 Extech Instruments Handheld Indoor Air Quality Carbon Dioxide Meter CO240. The user settable high alarm with audible beeper is perfect for conducting a quick check of CO2 level to help adjust the environmental conditions in an enclosed area such as a... ... more | FREE shipping go to store |
 | Autopilot APCEM2 Hydroponic Gardening CO2 RH Temperature Monitor and Data Logger - 1 Monitoring stats such as carbon dioxide, temperature, and relative humidity are imperative to growing healthy, strong plants in an indoor gardening system such as a grow room or greenhouse. ... more | FREE shipping go to store |
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