PROTECTIVE DEVICE FOR A HUMIDITY SENSOR IN AN AGGRESSIVE ATMOSPHERE
First Claim
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1. A protective device for a humidity sensor, comprising:
- a protective cap which has apertures which are covered by a diaphragm in such a way that a substance exchange between a measuring medium prevailing in the surroundings and an interior of the protective cap takes place through the diaphragm, the diaphragm being made of a plastic having a high permeability to water vapor, a high temperature resistance and a high resistance against corrosive substances.
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Abstract
A protective device for a humidity sensor protects the sensor from aggressive substances in a fluid to be analyzed. The protective device for the humidity sensor comprises a protective cap having openings that are covered with a membrane in such a manner that mass transfer between a measuring medium present in the environment and the interior of the protective cap can only take place through the membrane, said membrane including a plastic material which is highly permeable to water vapor, has high thermal stability and high corrosive resistance.
23 Citations
20 Claims
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1. A protective device for a humidity sensor, comprising:
a protective cap which has apertures which are covered by a diaphragm in such a way that a substance exchange between a measuring medium prevailing in the surroundings and an interior of the protective cap takes place through the diaphragm, the diaphragm being made of a plastic having a high permeability to water vapor, a high temperature resistance and a high resistance against corrosive substances. - View Dependent Claims (2, 3, 4, 5, 6, 12)
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7. A measuring chamber, comprising:
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two connectors, and a sensor situated in an interior space of the measuring chamber, wherein a measuring medium flowing through the interior space of the measuring chamber via the two connectors, and wherein the sensor is separated from the measuring medium by a partition wall having a diaphragm made of plastic with high permeability to water vapor, a high temperature resistance and a high resistance against corrosive substances. - View Dependent Claims (8, 9, 10, 11)
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13. A measurement device, comprising:
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a sensor; a protective device that protects the sensor, wherein the protective device includes; a protective cap having at least one aperture; a diaphragm covering the at least one aperture, wherein the diaphragm is made of a plastic having a high permeability to water vapor, a high temperature resistance and a high resistance to corrosive substances. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification