About: http://webisa.webdatacommons.org/432067561

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	In the present invention, the source and the detector are closely spaced, the source is an LED, and the detector is a phototransistor.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca