Method and arrangement of measuring acidity or other chemical or physical property of a gas
First Claim
1. A method of measuring acidity or other chemical or physical property of a gas, the method comprising:
- contacting a membrane having optical indicator molecules bound to a microporous matrix with the gas to be measured, the optical indicator molecules changing their color in response to the acidity or other chemical or physical property of the gas, anddirecting light to the membrane, whereby a part of the light is absorbed into the optical indicator molecules, and measuring the light passed through the membrane,wherein the light directed to the membrane has more than one wave length,wherein a porous mirror is disposed on the membrane and includes at least one layer allowing ions to pass through and reflecting light backwards to a detector.
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Accused Products
Abstract
A method and an arrangement of measuring acidity or other chemical or physical property of a gas. The invention comprises a membrane having optical indicator molecules bound to a microporous matrix arranged to be placed into contact with the gas to be measured, the optical indicator molecules changing their colour in response to the acidity or other chemical or physical property of the gas, a light source, and a detector. The light source is arranged to emit and direct light to the membrane, the light being transmitted through the membrane, whereby a part of the light is absorbed into the optical indicator molecules, and the rest of the light emitted is guided to the detector, where it is measured.
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Citations
10 Claims
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1. A method of measuring acidity or other chemical or physical property of a gas, the method comprising:
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contacting a membrane having optical indicator molecules bound to a microporous matrix with the gas to be measured, the optical indicator molecules changing their color in response to the acidity or other chemical or physical property of the gas, and directing light to the membrane, whereby a part of the light is absorbed into the optical indicator molecules, and measuring the light passed through the membrane, wherein the light directed to the membrane has more than one wave length, wherein a porous mirror is disposed on the membrane and includes at least one layer allowing ions to pass through and reflecting light backwards to a detector. - View Dependent Claims (2, 3)
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4. A system for measurement of acidity or other chemical or physical property of a gas, comprising:
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a membrane having optical indicator molecules bound to a microporous matrix arranged to be placed into contact with the gas to be measured, the optical indicator molecules changing their color in response to the acidity or other chemical or physical property of the gas, a light source, and a detector, the light source being arranged to emit and direct light to the membrane, wherein the membrane, light source and detector are arranged such that a part of the light is absorbed into the optical indicator molecules, and the rest of the light emitted is passed through the membrane and guided to the detector, where it is measured, wherein the light source is arranged to emit more than one wavelength, wherein a porous mirror is disposed on the membrane and includes at least one layer allowing ions to pass through and reflecting light backwards to the detector. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification