Gas sensor and control method therefor
First Claim
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1. A gas sensor comprising:
- a gas detection chamber into which a detection gas is introduced;
a detecting element and a compensating element each disposed in the gas detection chamber;
a first detection device which detects concentration of a detection target gas contained in the detection gas, in accordance with a difference in electrical resistance values between the detecting element and the compensating element; and
a dehumidifying element which is provided in the gas detection chamber, and reversibly absorbs water contained in the detection gas and drains off the water absorbed in the dehumidifying element.
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Abstract
A gas sensor includes a gas detection chamber into which a detection gas is introduced, a detecting element and a compensating element each disposed in the gas detection chamber, a detection device which detects the concentration of a detection target gas contained in the detection gas, in accordance with a difference in electrical resistance values between the detecting element and the compensating element, and a dehumidifying element which is provided in the gas detection chamber, and reversibly absorbs water contained in the detection gas and drains off the water absorbed in the dehumidifying element.
26 Citations
10 Claims
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1. A gas sensor comprising:
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a gas detection chamber into which a detection gas is introduced;
a detecting element and a compensating element each disposed in the gas detection chamber;
a first detection device which detects concentration of a detection target gas contained in the detection gas, in accordance with a difference in electrical resistance values between the detecting element and the compensating element; and
a dehumidifying element which is provided in the gas detection chamber, and reversibly absorbs water contained in the detection gas and drains off the water absorbed in the dehumidifying element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control method for a gas sensor including:
- a gas detection chamber into which a detection gas is introduced;
a detecting element and a compensating element each disposed in the gas detection chamber;
a first detection device which detects concentration of a detection target gas contained in the detection gas, in accordance with a difference in electrical resistance values between the detecting element and the compensating element; and
a dehumidifying element which is provided in the gas detection chamber, and reversibly absorbs water contained in the detection gas and drains off the water absorbed in the dehumidifying element, the control method comprising;
detecting temperature of the dehumidifying element; and
changing the temperature of the dehumidifying element to a predetermined temperature.
- a gas detection chamber into which a detection gas is introduced;
Specification