Pulse oximeter for determination of oxygen saturation and heart rate pulse The pulse oximeter PM 100 measures blood oxygen saturation levels and heart rate reliably and accurately. Both of these readings can be viewed on the well-readable OLED display in four different views as a bar graph or in wave form. The pulse oximeter PM 100 is a practical everyday companion not only at home, but also on trips, thanks to its convenient "one-touch" operation.