Sensing assembly for a gas sensor for detecting a reactive gas
AssigneeUnited Fiber Sensing Holding B.V.
InventorKorina Luise Frederike HARTMANN
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Abstract
A sensing assembly for detecting a reactive gas to be sensed such as hydrogen, a method of manufacturing thereof, and a gas sensor. The sensing assembly includes an optical fiber having a temperature sensitive detection zone, and a reaction layer associated with an external surface of the optical fiber positioned at least adjacent to the temperature sensitive detection zone. The reaction layer includes a polyimide-based polymer and a reactive composition adapted to generate a temperature change when brought into contact with the gas to be sensed. The temperature sensitive detection zone may be a fiber Bragg grating. The reaction layer may include the polymer. The reaction reactive composition may include tungsten oxide and a catalyst such as platina.
Claims21
A sensing assembly for detecting a reactive gas to be sensed such as hydrogen, the sensing assembly being for use in a gas sensor, the sensing assembly comprising:
- an optical fiber having a temperature sensitive detection zone;
- and
- a reaction layer associated with an external surface of the optical fiber positioned at least adjacent to the temperature sensitive detection zone, wherein the reaction layer comprises a polyimide-based polymer and a reactive composition adapted to generate a temperature change when brought into contact with the gas to be sensed.
A method of manufacturing a sensing assembly for detecting a reactive gas to be sensed such as hydrogen, the sensing assembly being for use in a gas sensor, the method comprising:
- providing an optical fiber having a temperature sensitive detection zone;
- and
- applying a reaction layer onto an external surface of the optical fiber, wherein the reaction layer is applied at least adjacent to the temperature sensitive detection zone, wherein the reaction layer comprises a polyimide-based polymer and a reactive composition adapted to generate a temperature change when brought into contact with the gas to be sensed.
(canceled)
Dependencies are inferred from the claim text.