About: http://webisa.webdatacommons.org/80788298

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	Power is applied to each of the sensors and a current is output that will vary depending on how the sensors are turned in an external magnetic field, such as the Earth's magnetic field.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com