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The Mass Spectrometer. In order to measure the characteristics of individual molecules, a mass spectrometer converts them to ions so that they can be moved about and manipulated by external electric and magnetic fields. The three essential functions of a mass spectrometer, and the associated components, are:
How does a Pulse Oximeter work? A Pulse Oximeter works by shooting light through the area of our body being used for the measurement (lets, assume from now onward that it is a finger) and detecting the amount of light that managed to to through that finger.