About: http://webisa.webdatacommons.org/24298433

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Such a sensor typically has light source, for example LEDs, emitting red and infra-red light beams which are directed onto human tissue and a detector which receives the light transmitted through or reflected from the tissue.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com