About: http://webisa.webdatacommons.org/279600277

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	Better not use floating point numbers for this as these are (much) slower than longs. if you count the pulses you can update the rpm on your display e.g. every second.
http://www.w3.org/ns/prov#wasQuotedFrom	arduino.cc