Answer:
The MAX30105 integrates three LEDs - Red, Infra Red (IR), and Green, a photo diode and a high performance analog front end (AFE). Combined with the algorithms, the MAX30105 uses these three LEDs to distinguish between sub-micron (below 1 micron) particles like smoke and super micron (above 1 micron) particles like dust and steam. The device works in high ambient light, complete darkness, or artificial light.