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. 2020 Nov 17;20(22):6568. doi: 10.3390/s20226568

Figure 9.

Figure 9

Figure 9

Healthy volunteer (Participant P9) example traces, (a) red channel PPG, sensor A; (b) IR channel “PPG,” sensor A; (c) red channel PPG, sensor B; (d) IR channel PPG, sensor B; (e) SpO2 fibre sensor B and Masimo reference device; (f) red channel PPG, sensor C; (g) IR channel “PPG,” sensor C; (h) red channel PPG, sensor D; (i) IR channel, sensor D; (j) SpO2 sensor D and Masimo reference device. Note: Those traces with “PPG” designation indicate that a PPG cannot be clearly seen and hence an SpO2 calculated trace is not presented.