Patent ID: 8408050
Filing Date: 2013-04-02
Classification: G01F,G01N

Abstract:
1. A method for determining a fluid composition parameter of an unknown fluid using a flow sensor, wherein said flow sensor comprises a heater arranged between a first and a second temperature sensor, said method comprising the steps of contacting said unknown fluid to said first temperature sensor, then contacting said unknown fluid to said heater, and then contacting said unknown fluid to said second temperature sensor, measuring a first temperature, TP measuring a second temperature, TP determining a temperature difference, DTP, between TP retrieving first calibration data, wherein said first calibration data was obtained from a calibration measurement carried out with a reference fluid of known composition, calculating, using said first calibration data, a reference temperature, Tref(DTP), equal to a single temperature of said reference fluid for said temperature difference DTP, and calculating a temperature offset, D, wherein D =T −Tref(DTP), and determining a value of the fluid composition parameter based upon the calculated value of D,