Smart flow sensor with combined frequency, duty-cycle, and amplitude output (original) (raw)

2010 IEEE Sensors, 2010

Abstract

A thermal flow sensor with smart electronic interface is presented. The sensor is based on four germanium thermistors embedded in a thin membrane and connected to form a Wheatstone bridge. Both the bridge unbalance voltage and the voltage at the bridge supply terminals under constant current excitation are functions of the flow offering high initial sensitivity and wide measurement range,

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