Open path CO2analyser
- 1 December 1981
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 14 (12) , 1415-1419
- https://doi.org/10.1088/0022-3735/14/12/016
Abstract
An open path CO2 analyser is described for measuring CO2 fluxes over crop canopies by the eddy correlation technique. The analyser measures CO2 concentration within 0.3 ppm by volume with a time constant of 0.075 s. The CO2 concentration is determined from a comparison of the absorption of infrared radiation in the 3.7 mu m and 4.3 mu m bands over a 1.5 m path.Keywords
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