Patent ID: 6629455
Filing Date: 2003-10-07
Classification: B67D,G01F

Abstract:
Method of determining the throughflow of a gas mixture, the method comprising:flowing the gas mixture past a flow sensor which has a heating device and a first temperature probe reacting to the temperature of the heating device, measuring a temperature, which is characteristic of the temperature of a liquid above which the gas mixture stands as vapour, with a second temperature probe, producing a first signal characterizing the composition of the gas mixture and thus the heat dissipation capacity of the gas mixture using the temperature of the liquid measured by application of the second temperature probe and a vapour-pressure curve which is a characteristic of the liquid, the vapour-pressure curve defining a relationship of the liquid's vapour pressure as a function of the liquid's temperature to determine the liquid's vapour pressure based on the liquid's temperature measured by application of the second temperature probe, and producing a second signal characterizing the throughflow of the gas mixture using the heating power supplied to the heating device, the temperature measured by the first temperature probe and the first signal.