A new sensor could soon allow hospital patients' blood oxygen levels to be checked via their breath. The technology is claimed to be more reliable and less painful than existing traditional methods.

Thanks to new OS updates rolling out now, you can once again use your Apple Watch to measure the oxygen level in your blood.

The Smart Sock 2 is great for parents who want to monitor their child's heart rate and blood oxygen level, but it looks like the product has changed.

Like most modern wrist wearables, that ECG sensor uses LED lights to monitor your heart rate and pulse transit time (PTT). The rear PPG passively determines blood oxygen levels as well.

To use the feature, just open the Blood Oxygen app on your Apple Watch while the watch is on your wrist.

Learn how to create a simple heart rate monitor using an Arduino Pro Mini, PulseSensor, and OLED display. This beginner-friendly project is perfect for learning basic electronics, sensors, and ...