Bioprobe : Optical Heart Rate Module + Actigraphy


The fastest way to ‘quick start’ optical heart rate.

This ‘system’ module integrates our unique optical architecture with a dedicated accelerometer and an arm mcu with a preloaded Bioprobe OP – delivering to wearable devices fully processed and validated heart rate information.

Bioprobe 1 contains Salutron’s unique optical architecture.  This proprietary design consists of four high resolution optical detectors surrounding the single probe beam, enabling high heart rate performance and low power.  This system maximizes both the amount of photons reaching the skin from the single probe beam and the quantity of reflected photons being detected.

In any optical heart rate monitoring system, not all the photons from the emitter(s) reach the skin, and of those that do, some are absorbed and the rest are reflected in all directions within the detector assembly.

Bioprobe 1’s optics maximize the amount of photons reaching the skin and the quantity of reflected photons detected, resulting in high resolution and signal to noise ratio of heart signals.

Wearable Device


Sensor processing unit

  • Standard continuous heart rate monitoring
  • Motion artifact compensation
  • Cardiac model adaptive filtering
  • Heart rate computation

Analog front end

  • Unique high resolution optical detection and ambient light rejection
  • proprietary low power, high signal to noise amplification and conditioning

PPG, optics and accelerometer

  • Patented optical architecture
  • Four detectors surrounding one led
  • High optical coupling efficiency


  • 18.5 mm diameter, 2.5mm thickness (effective 1.75mm thickness when integrated into device’s case back)
  • 6 total pins
  • Communication interface: i2c

Contact for more information, samples or development kits.