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Polar OH1 Optical heart rate sensor

Optical heart rate sensor is a rechargeable device that measures user’s heart rate with LED technology. Store page

Polar OH1 features available by the SDK

  • Heart rate as beats per minute.
  • Heart rate broadcast.
  • Photoplethysmograpy (PPG) values.
  • PP interval (milliseconds) representing cardiac pulse-to-pulse interval extracted from PPG signal.
  • Accelerometer data with samplerate of 50Hz and range of 8G. Axis specific acceleration data in mG.

Important considerations

Warning

Polar OH1 PPI algorithm is a separate algorithm than the HR one used when PPI data is not being requested. When PPI recording is enabled, HR is only updated every 5 seconds. Also it takes around 25 seconds for the first sample batch to be sent over BLE for streaming.

Important

Skin contact detection is very unreliable in Polar OH1. Skin contact of PPI packets should not be trusted, and it might be possible for the device to output a heart rate that is not 0 even the device is not worn. That is a limitation of the older generation of optical heart rate solution.