Abstract: A smartphone-operated wireless HVAC airflow anemometer device and system includes an anemometer device having an impeller assembly, an inductor and a controller. A magnet within the impeller assembly generates an oscillating current in the inductor which is proportional to the rotational rate of the impeller. A controller captures and transmits this information wirelessly to an airflow balancing application located on a smartphone device that includes a plurality of algorithms for calculating airflow information. An environmental sensor unit, and an electronic compass are also located within the wireless anemometer device.

Abstract: A smartphone-operated HVAC airflow anemometer device and system includes an anemometer device having an impeller and a photo interrupter circuit. The circuit generates an output signal that is proportional to the rotation speed of the impeller, and transmits the same via a headphone jack to a smartphone device running an airflow balancing application. The airflow balancing application receives airflow data from the anemometer and provides power to the same. The application can apply one or more algorithms to the received airflow data to generate airflow information which can be stored or transmitted by the smartphone device.