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Entry Date
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Nick Name
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Location
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Tuesday, June 09, 2020
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Matt D.
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Connecticut
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Entry 126 of 190 |
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CO2 Sensor placement
Sensors are only as good as their placement. There are two in the image each going to the previously mentioned independent controllers. There is one directly above the other so with CO2 being heavier than air knowing this placement there will be some differences expected in the readings. Typically, each sensor reads with-in 75ppm of the other which is in line with the expectations due to their placement.
A clear umbrella is used since each has a photo cell to ensure CO2 dosing only during daylight hours. The umbrella is needed because there is a sprinkler/mister used for cooling and the sensors should not get wet so this is the reason for this placement. Not only are they protected but they are placed at leaf height to ensure the readings generated represent what the plant is exposed to. The dome protection from the umbrella still allow for air circulation so an accurate and consistent reading can be achieved.
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