Wearable guides
Amazfit T-Rex Ultra: PPG Sensor
Amazfit’s T-Rex Ultra lists a BioTracker PPG sensor with blood-oxygen support, up to 20 days of typical battery and 10 ATM water resistance. The photograph is the original T-Rex Ultra, not T-Rex Ultra 2.
Amazfit’s T-Rex Ultra specifications list a BioTracker PPG sensor that supports blood oxygen, up to 20 days of typical battery (up to 25 days in battery saver, and up to 9 days in heavy use) and 10 ATM water resistance (Amazfit: T-Rex Ultra).
The photograph is that original T-Rex Ultra. It is not the T-Rex Ultra 2. This guide does not add accuracy figures. If the evidence table includes an Amazfit row, that row names the model that was tested.
Sourced figures
Every number in this guide comes from the source linked beside it. Each study result applies to that study's devices, participants and protocol only.
Amazfit T-Rex Ultra manufacturer specifications: BioTracker PPG with blood-oxygen support; up to 20 days typical battery, up to 25 days in battery saver, up to 9 days heavy use; 10 ATM.
What published studies show
Results quoted from 1 published validation study, each against a clinical reference. A result applies to the model and protocol tested, not to every model the brand sells. From the wearable accuracy database (v1.0.0).
Heart rate during exercise1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Amazfit Cor / Bip | Absolute percentage error within 10% at every stageStudy finding (no single number) | 12-lead ECG | n = 51, Incremental treadmill test | Ibrahim et al. (2024)Funding not reported |
- Amazfit Cor / BipAbsolute percentage error within 10% at every stage
Study finding (no single number) · vs 12-lead ECG · n = 51, Incremental treadmill test
Ibrahim et al. (2024) Funding not reported
Amazfit T-Rex Ultra: PPG Sensor Comparisons
Frequently Asked Questions
Is this the T-Rex Ultra 2?
No. The photograph and the specifications on this page are the original Amazfit T-Rex Ultra.
Are the evidence-table results for the T-Rex Ultra?
Only when the row names the T-Rex Ultra. A brand table can also include older Amazfit models.
Sources
- Amazfit. Amazfit T-Rex Ultra specifications