ITEM NAME:MAX30100 Heart-Rate Oximeter Pulse Sensor Pulsesensor Module For Arduino 3C a.imagelink a:hover.imagelink {color:#2C449E;.It's an optical sensor that derives its readings. pressure can constrict capillary blood flow and therefore diminish the reliability of the data. A programmable INT pin is also available. processed by a low-noise analog signal processing unit and communicated to the target MCU through the mikroBUS I2C interface.