Patent ID: 8667839
Filing Date: 2014-03-11
Classification: G01F,G01L

Abstract:
1. A heat conduction-type sensor comprising at least two thin films thermally separated from a substrate ( 1 ) by the same cavity ( 40 ), wherein one thin film ( 10 ) comprises at least a heater ( 25 ) and a temperature sensor ( 20 ), the other thin film ( 12 ) comprises a temperature sensor ( 20 ), the thin film ( 10 ) and the thin film ( 12 ) are formed to be arranged in proximity to and spatially separated from each other so that the thin film ( 12 ) is heated only through a measurement target fluid when the thin film ( 10 ) is heated by the heater ( 25 ), and the substrate ( 1 ) comprises calibration circuit means ( 200 ) configured to calculate an amount concerning heat transfer coefficients of a standard fluid and the unknown measurement target fluid based on information concerning a temperature of the heater ( 25 ) when heating the heater ( 25 ), information concerning temperatures of the standard fluid and the unknown measurement target fluid from the temperature sensor ( 20 ) formed on the thin film ( 12 ), and information of a temperature of the measurement target fluid at the time of measuring a physical state of the measurement target fluid and to calibrate effects of a temperature and a type of the measurement target fluid on the measurement of the physical state of the measurement target fluid based on the amount concerning the heat transfer coefficients, or the substrate ( 1 ) comprises a calibration circuit terminal configured to communicate with the calibration circuit means ( 200 ) provided outside.