This sensor is a pulse sensor which is developed based on PPG techniques. This is a simple and low-cost optical technique that can be used to detect blood volume changing in the microvascular bed of tissues. It is relatively easy to detect the pulsatile component of the cardiac cycle according to this theory.

To ease the difficult of using this sensor,  a Gravity Interface is adapted to allow plug&play.  The IO sensor shield is the best match for this sound senor connecting to your Arduino or other microcontroller. As this sensor can work at 3.3V which make it compatible with Raspberry Pi, intel edison, joule and curie. 

Specifications:                   

• Output Voltage: 0 - Vin (Analog), 0/ Vin (Digital)
• Operating current: <10mA
• Dimension: 28 x 24(mm), 1.102" x 0.945"(in)
• Interface Type: PH2.0-3P

Documents:

Wiki Docs

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Shipping List

• Heart Rate Monitor Sensor For Arduino x1
• Wrist belt x1
• PH2.0-3P cable x1