Data Sheet

biosignalsplux
User Manual
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3.2.7 SpO2
Figure 54: SpO sensor (versatile).
Figure 55: SpO2 sensor with finger clip.
The SpO2 (peripheral capillary oxygen saturation) sensor uses two emitting LED’s one in
the red region and the other in the infrared region of the spectrum. The reflected light of
each one of these LED’s is absorbed by a photodiode that converts this current into a
digital value that is sent via SPI. This sensor can be used to estimate the oxygen
saturation level on the blood with +/- 2% accuracy compared to a medical sensor.