Due to the rapid development of the engineering technology and the improvement of the living environment, the application scope of the fluid machines are becoming more various. In this study a comparative study on some representative anemometers and flow meters, which are used at the local sites, is conducted. It is intended to suggest a new kind of portable flow meter that supplements the existing restriction. Also in this study, an experiment comparing a mass flow meter is conducted in order to confirm the accuracy of the performance of the multi-nozzle testing apparatus conforming to ANSI/ASHRAE 51-1999.
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