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US 7,398,188 B2Granted
Apparatus for determining and/or monitoring a physical or chemical quantity
AssigneeEndress + Hauser (Deutschland) AG + Co. KG
InventorMichael Kirst
Life of this patent
Estimating the term…
Abstract
An apparatus for determining and/or monitoring a physical or chemical quantity during a process. The apparatus comprises at least one field device which exchanges data with a remote monitoring station by means of a data connection. The apparatus is provided with at least one fuel cell which is electrically connected to the field device, but arranged at a distance from the field device, and at least partially covers the energy demand of the field device.
Claims23
An apparatus for determining and/or monitoring a physical or chemical variable in a process, comprising:
- a remote control station;
- data connection;
- at least one field device with a sensor for determining at least one physical process variable, said at least one field device exchanges data with said remote control station via said data connection;
- and
- at least one fuel cell arranged at a remote location from said at least one field device and electrically connected with said at least one field device via said data connection,
- wherein:
- said at least one fuel cell at least partially covers the energy requirement of said at least one field device;
- and
- replenishment of said at least one fuel cell occurs at said remote location.
6 more elements
Dependencies are inferred from the claim text.