In smartwatches and fitness trackers, pulse oximeters are often referred to as SpO2 sensors. Not all pulse oximeters work the same way, and it’s hard for most medical civilians to judge whether ...

Pulse oximetry is a ubiquitous non-invasive medical sensing method for measuring pulse rate and arterial blood oxygenation. Conventional pulse oximeters use expensive optoelectronic components ...

But in addition to the standard pulse oximeter hardware, they also include a TCS34725 color sensor to quantify the user’s skin tone. So what’s the issue?

Pulse oximetry works by oxygen binding to hemoglobin in red blood cells as it moves through your lungs. Arterial blood flow carries this all through your body. A pulse oximeter uses two frequencies of ...