Patent ID: 8029731
Filing Date: 2011-10-04
Classification: G01F,Y10T

Abstract:
1. A device for determining a physical quantity of a process medium in a container which is chosen from the group consisting of pressure, flow rate, temperature, and chemical composition, comprising: a sensor part; an electronic part; at least one fuel cell, said sensor part, said electronic part and said at least one fuel cell being electrically connected, wherein: said electronic part and said at least one fuel cell are disposed in one housing; said housing is spatially separated from said sensor part in such a way that said sensor part is disposed in the process medium or in the vicinity of the process medium, while said electronic part is located outside the container that contains the process medium; and a closed control loop, assures that the energy furnished by the fuel cell is made available as a function of the particular power demand of said sensor part and of said electronic part.