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. Author manuscript; available in PMC: 2021 Nov 30.
Published in final edited form as: Inhal Toxicol. 2020 Nov 30;32(13-14):477–486. doi: 10.1080/08958378.2020.1850935

Figure 9: Exposure chamber O2 and CO2 gas concentrations, temperature and relative humidity during a typical 20-exposure cycle protocol.

Figure 9:

The exposure setting used were: 5s Puff, 5s Mix, 180s exposure, 120s purge, and 5s rest. A, shows CO2 / O2 variations; CO2 level did not exceed 0.8 % on highest peak and O2 levels not lower than 19.4 %. B, Temperature was varying ~ 1.5 °C per cycle, and average temperature rose 2 °C over the full 20 cycles. Ambient temperature was 24 °C. C, Relative humidity varies approximately 10% per cycle. 8 cycles shown in each panel.