Health Sensor Data Specifications

Continuous Tracker Types

A Wear OS application can retrieve the following health sensor data continuously with a periodic event until the event is unset.

Tracker Type	Raw / Processed	Description
ACCELEROMETER_CONTINUOUS	Raw	It provides x, y, and z axis values measured at a frequency of 25 Hz. Measured data is retrieved with AccelerometerSet data points in TrackerEventListener.onDataReceived().
EDA_CONTINUOUS	Raw	Electrodemal activity data measured at a frequency of 1 Hz. [Watch display - on] Measured data is retrieved with 1 EdaSet data point in TrackerEventListener.onDataReceived(). [Watch display - off] Measured data is retrieved with EdaSet data points in TrackerEventListener.onDataReceived(). * EDA measurement is available with Galaxy Watch8 series or later models.
HEART_RATE_CONTINUOUS	Processed	Heart rate data including inter-beat interval (IBI) measured at a frequency of 1 Hz. [Watch display - on] Measured data is retrieved with 1 HeartRateSet data point in TrackerEventListener.onDataReceived(). [Watch display - off] Measured data is retrieved with HeartRateSet data points in TrackerEventListener.onDataReceived(). * IBI values for the complete tracking times are stored in the first data point. The other data points contain NULL.
PPG_CONTINUOUS	Raw	Includes Photoplethysmogram (PPG) green, Infrared (IR), and red data measured at a frequency of 25 Hz. Measured data is retrieved with PpgSet data points in TrackerEventListener.onDataReceived().
SKIN_TEMPERATURE_ CONTINUOUS	Processed	Skin temperature and ambient temperature around the Galaxy Watch. This is not the same as body temperature. [Watch display - on] Measured data is retrieved with 1 SkinTemperatureSet data point in TrackerEventListener.onDataReceived(). [Watch display - off] Measured data is retrieved with SkinTemperatureSet data points in TrackerEventListener.onDataReceived(). * Tracking skin temperature is available with Galaxy Watch5 series and later models. * For Galaxy Watch5, the skin temperature is measured after updating watch software to Android 13 (API level 33) or higher.

On-demand Tracker Types

See Using On-demand Tracker Type for more information on using an on-demand tracker type.

Tracker Type	Raw / Processed	Description
BIA_ON_DEMAND	Processed	Body composition data. Measured data is retrieved with 1 BiaSet data point in TrackerEventListener.onDataReceived().
ECG_ON_DEMAND	Raw	ECG data measured at a frequency of 500 Hz. Measured data is retrieved EcgSet data points in TrackerEventListener.onDataReceived().
MF_BIA_ON_DEMAND	Processed	Multi-frequency bioelectrical impedance (MF-BIA) data. It provides the phase of body impedance and body impedance at frequencies of 5 kHz, 10 kHz, 50 kHz, and 250 kHz. Measured data is retrieved 1 MfBiaSet data point in TrackerEventListener.onDataReceived(). * Tracking MF-BIA is available with Galaxy Watch8 series and later models.
PPG_ON_DEMAND	Raw	Includes PPG Green, IR, and Red data measured at a frequency of 100 Hz. Measured data is retrieved 1 PpgSet data point in TrackerEventListener.onDataReceived().
SKIN_TEMPERATURE_ON_DEMAND	Processed	Skin temperature and ambient temperature around the Galaxy Watch. This is not the same as body temperature. Measured data is retrieved 1 SkinTemperatureSet data point in TrackerEventListener.onDataReceived(). * Tracking skin temperature is available with Galaxy Watch 5 series and later model. * For Watch5, the skin temperature is measured after the watch software update for Android 13 (API level 33) or higher.
SPO2_ON_DEMAND	Processed	Blood oxygen data. Measured data is retrieved 1 Spo2Set data point in TrackerEventListener.onDataReceived(). Tracking SpO2 is available with watch Health Platform v1.3.0 or above.

Other

Measuring the user’s sweat loss amount after a running is available with the following tracker type.

Tracker Type	Raw / Processed	Description
SWEAT_LOSS	Processed	Sweat loss amount for a running exercise. 1 SweatLossSet data point is retrieved.

Using On-demand Tracker Type

Please follow these guidelines when using an on-demand tracker type:

• Use the tracker in a foreground application, not in the background.
  Do not use more than one on-demand tracker at the same time.
• An on-demand tracker type is not intended for continuous measurement.
  Track on-demand type sensors in 30 seconds.
• During on-demand tracker type data measurement, tracking a continuous tracker type can give invalid values.