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. 2021 Apr 27;21(14):15935–15943. doi: 10.1109/JSEN.2021.3076102

Fig. 2.

Fig. 2.

(a) Temperature and flow control of baseline drift over the MQ-2 and MQ-135 MOS based sensors, (b) Output responses of the MQ-2 sensor at different flow rates of 300 ppm sample solution, (c) Output responses of the MQ-135 sensor at different flow rates of 300 ppm sample solution.