Abstract: A Kelvin sensed hot-wire anemometer includes four electrically conductive pins and a filament welded to all four pins, preferably using a single filament. A current source is coupled to the two innermost pins so as-to provide current flow in the segment of filament between the two innermost pins. The two outermost pins are coupled to a high impedance voltage sense amplifier that senses the voltage drop across the energized segment of filament between the two innermost pins. The resistance of the filament is determined based on the current provided to the filament and the measured voltage. The Kelvin sensed hot-wire anemometer can be used in a number of applications, including, but-not limited to medical devices that measure gas flow rates during inhalation and exhalation.