Technology
Engineering
Six sensors.
One 2.8mm band.
The finger provides the clearest biosignal on the human body. Superficial blood vessels, low tissue mass, minimal motion artifact. AURORA puts six clinical-grade sensors exactly there.
Photoplethysmography (PPG)
Infrared and green LED sensors detect blood volume changes in the microvascular tissue of the finger. Used to derive resting heart rate, heart rate variability, and blood oxygen saturation in real time.
SpO₂ Monitoring
Red and infrared wavelengths measure the ratio of oxygenated to deoxygenated hemoglobin. AURORA tracks blood oxygen continuously through the night, flagging drops that indicate disrupted breathing or poor recovery.
Heart Rate Variability (HRV)
HRV measures millisecond variation between heartbeats — one of the most sensitive proxies for autonomic nervous system state and recovery readiness. AURORA calculates nightly HRV and tracks trend lines week over week.
Skin Temperature
A dedicated NTC thermistor tracks nightly skin temperature deviation from baseline. Even small deviations (±0.2°C) can signal illness onset, hormonal shifts, or incomplete recovery before symptoms appear.
3-Axis Accelerometer
Motion data feeds into sleep staging algorithms, step counting, activity recognition, and caloric estimation. Cross-referenced with heart rate data to distinguish sleep stages: light, deep, and REM.
Galvanic Skin Response
Micro-electrical conductance measurement through the finger surface reflects changes in emotional arousal and stress state. Used to quantify stress load throughout the day and flag recovery debt patterns.