About: http://webisa.webdatacommons.org/273923223

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	Preferably, each source/detector element is an LED that can transmit and detect light using similar spectral response characteristics.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com