Degree Controls, Inc.

Clarke Bailey

Raouf A Ismail

Karl Y Hiramoto

A gas velocity and temperature sensor system comprising a first thermistor driven at a constant temperature and configured to output a flow signal representative of the power dissipated as a function of the gas velocity and a temperature signal representative of the temperature of the first thermistor, a second thermistor configured to output a gas temperature signal representative of the gas temperature proximate the second thermistor, and a processor responsive to the flow signal and the temperature signals, the processor configured to calculate gas velocity using an empirically derived equation in which gas flow velocity is function of a constant and the ratio of the power dissipated to the temperature difference between the temperature of the first thermistor and the gas temperature proximate the second thermistor, the processor deriving a signal representing the gas velocity.

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Jaffrey, NH, United States of America

Clarke Bailey