MULTIPLE GAS SENSOR
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Abstract
A gas detector for determining the contributions of two or more target gases in an atmosphere to be sampled, the gas detector comprising: a gas sensor for sampling the gas, the gas sensor having a sensitivity to a target gas which is dependent on the temperature of the gas sensor; a temperature regulating device configured to change the temperature of the gas sensor; calculating means in communication with the gas sensor; wherein the gas detector is configured to: sample the atmosphere with the gas sensor at a plurality of temperatures, wherein the temperature regulating device changes the temperature of the sensor; and determine using the calculating means the contributions of the two or more target gases based on the measurements at the plurality of gas sensor temperatures and the sensitivity of the gas sensor at the plurality of gas sensor different temperatures.
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Citations
40 Claims
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1-22. -22. (canceled)
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23. A gas detector for determining the contributions of two or more target gases in an atmosphere to be sampled, the gas detector comprising:
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a gas sensor for sampling the gas, the gas sensor having a sensitivity to a target gas which is dependent on the temperature of the gas sensor; a temperature regulating device configured to change the temperature of the gas sensor; a processor; wherein the gas detector is configured to change the temperature of the sensor, thereby changing the sensitivity of the sensor to the target gas, and sample the atmosphere with the gas sensor at a plurality of temperatures, using the temperature regulating device to change the temperature of the sensor, and wherein the detector further comprises a processor in communication with the gas sensor; and wherein the detector is further configured to determine, using the processor, the contributions of the two or more target gases based on the measurements at the plurality of gas sensor temperatures and the sensitivity of the gas sensor at the plurality of gas sensor different temperatures, wherein the range of the plurality of gas sensor temperatures is between −
30°
C. to 50°
C. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of determining the contributions of two or more target gases in an atmosphere to be sampled, the method comprising the steps of:
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sampling the gas with a gas sensor, the gas sensor having a sensitivity to a target gas which is dependent on the temperature of the gas sensor, at a first temperature and; changing the temperature of the gas sensor with a heating device, thereby changing the sensitivity of the sensor to the target gas; sampling the gas with the gas sensor at a second different temperature; and determining, using a processor, the contributions of the two or more target gases based on the measurements at the plurality of gas sensor temperatures and the sensitivity of the gas sensor at the plurality of gas sensor different temperatures, wherein the range of the plurality of gas sensor temperatures is between −
30°
C. to 50°
C. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification