Clipped onto a fingertip, a pulse oximeter shows blood oxygen saturation (SpO2) and pulse within a few seconds. The choice is small and clear: the Medisana PM 100, which sends data to an app, and the Rossmax SB100 and SB200. When measuring, the finger should be warm and free of nail polish — cold hands are the most common cause of an inaccurate reading.
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Clipped onto a fingertip, a pulse oximeter shows blood oxygen saturation (SpO2) and pulse within a few seconds. The choice is small and clear: the Medisana PM 100, which sends data to an app, and the Rossmax SB100 and SB200. When measuring, the finger should be warm and free of nail polish — cold hands are the most common cause of an inaccurate reading.