The KCD-HP-1001 CO2 sensor probe was found to respond linearly to carbon dioxide concentration according to Vout = 8.0371*C - 891.23 and linearly to temperature according to Vout = 0.057786*T + 1.9743, where C is the concentration of carbon dioxide in ppm and T is the temperature in °C. A linear response to pressure was not confirmed. The comparison between the KCD-HP-1001 and the Carbocap GMP343 failed because of trouble with the CIO’s weather station. It was concluded that the operation of the KCD-HP-1001 is promising because of it linear response to carbon dioxide concentration and temperature and its small mean deviation. It is recommended that its response to humidity is tested and that a field test be conducted to compare the device with the Carbocap GMP343 and the Li-cor before a final conclusion can be given on replacing the Carbocap GMP343 with the KCD-HP-1001.
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