Development of Breath Flow Sensor with Thermistor

서미스터를 이용한 호흡유량 바이오센서

We have developed a breath flow sensor that is cheap, robust and has reasonable accuracy. It based on using two thermistors implanted in a breath nozzle, apart by a small but known distance. The sensors detect the small time interval when the breath tidal wave passes by. Therefore the speed of the breath gas can be determined in a given pipe of known diameter. The sensors are calibrated for a few parameters and their accuracy has been estimated.