A meter that clips onto a fingertip shows blood oxygen and pulse rate in a few seconds — useful during a respiratory illness or in the mountains. The Rossmax SB100 and SB200 are devices with a simple display, while the Medisana PM 100 connect also sends readings to a phone. During measurement the hand should be still and the finger warm, otherwise the reading tends to jump about.
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A meter that clips onto a fingertip shows blood oxygen and pulse rate in a few seconds — useful during a respiratory illness or in the mountains. The Rossmax SB100 and SB200 are devices with a simple display, while the Medisana PM 100 connect also sends readings to a phone. During measurement the hand should be still and the finger warm, otherwise the reading tends to jump about.