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. 2018 Mar 1;18(3):738. doi: 10.3390/s18030738

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Figure A2 — Uncompensated (raw) data measurements collected by an ABCD operating outdoors: (a) Sample and reference voltage signals; (b) Sample flow rate; (c) Temperature and relative humidity (RH). All data is provided on a 60-min time base.