Select an option below to continue reading this premium story. Already a Honolulu Star-Advertiser subscriber? Log in now to continue reading. Until the late 1700s there were no standard units. After ...

A device that measures the movement of liquid in a pipe. "Invasive" flow meters are coupled into the pipe and derive the flow rate from the rotation of a turbine or paddle wheel that is moved by the ...

DEFINITION: A digital device which measures the total energy used in the same way as a traditional meter, but can also ack when energy is used and how much it costs, highlighting opportunities for ...