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. 2018 Sep 11;14:80. doi: 10.1186/s13007-018-0347-y

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 8 — Functional schematic of OCTOflux system. Open semicircles represent atmospheric vent points. CO₂ is injected into a stream of pressurized air, mixed in a buffering volume and distributed to eight chambers and a reference line. The return line of each chamber is either vented through its null line vent or directed through the IRGA sample cell using solenoid valves