Boththe first generation Apple Watch Ultra and the Ultra 2 have a skin temperature reader, SpO2 reader, ECG sensor, and heart rate monitor. So regardless of which one you go for, you'll get the AppleWatch Ultra 2 features a new rugged 49mm Titanium case. Trade in an eligible Apple Watch and explore financing options. up to 72 hours on low power settings, Footnote 18 and up to 17 hours of full workout use in Low Power Mode with full heart rate and GPS. Footnote 20. Tested with heart rate sensor on during workout sessions Accordingto Mark Gurman, the Apple Watch Series 9 and Ultra 2 will focus on “speed, efficiency, and accuracy” as Apple looks to bring a series of under-the-hood upgrades. He reports that YourApple Watch Ultra is designed to comply with EN13319. The Depth app works to a maximum depth of 130 feet (40 meters). If you go below this depth, the screen turns yellow, and some functions of your Apple Watch Ultra might stop working or might work intermittently. The depth sensor on Apple Watch Ultra is accurate to plus or minus Availablein three models: Apple Watch Ultra 2, Apple Watch Series 9, and Apple Watch SE. Apple; Store; Mac; iPad; iPhone; Apple Watch Series 9. Powerful sensors, advanced health features. Buy. Learn more. 45mm or 41mm aluminum or stainless Apple Watch can alert family members if it detects unusually high or low heart rates, as well as TheApple Watch Ultra 2 blends the world of watchOS with premium fitness trackers. electrical heart sensor, third-generation optical heart sensor, temperature sensor high-g accelerometer, high Nochanges have been made to the optical heart rate sensor or dual-frequency GPS chip on the Ultra 2. Both have performed excellently in the past and after TheECG app uses the electrical heart sensor built into the Digital Crown and the back crystal of Apple Watch Series 4 or later * to record a single‑lead ECG similar to a Lead I ECG. The ECG app then provides a result of sinus rhythm, atrial fibrillation, atrial fibrillation with high heart rate or poor recording, and prompts the user to TheApple Watch Ultra 2 has a slightly different design to the traditional Apple Watch models, offering a tougher and more rugged look. the optical heart rate sensor is present beneath the AppleWatch features an advanced sensor and app to measure your blood oxygen levels, an important indicator of your overall wellness. 3 Learn how to use the Blood Oxygen il0lB.