Gas sensor
AssigneeDenso Corporation
InventorHirokazu Yamada
Life of this patent
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Abstract
In a gas sensor internally including a sensing element for measuring a specific gas concentration of a measured gas, an outer surface thereof has a measured gas surface exposed to a measured gas and an atmosphere surface exposed to the atmosphere, and at least a portion of the atmosphere surface has an emissivity equal to or lower than 0.3. Preferably, this emissivity is a value with respect to an electromagnetic wave having a wavelength of 0.5 to 1 μm, and the a region of the atmosphere surface, contributing 60% or more of the atmosphere surface, has an emissivity equal to or lower than 0.3. This provides a gas sensor less susceptible to radiant heat and less temperature-increasable.
Claims8
A gas sensor internally including a sensing element for measuring a specific gas concentration in a measured gas to be measured, an outer surface of said gas sensor including a measured gas surface exposed to said measured gas and an atmosphere surface exposed to the atmosphere, and at least a portion of said atmosphere surface has an emissivity equal to or lower than 0.3;
- wherein a region of said atmosphere surface, which contributes 60% or more of said atmosphere surface, has an emissivity equal to or lower than 0.3.
A gas sensor internally including a sensing element for measuring a specific gas concentration in a measured gas to be measured, an outer surface of said gas sensor including a measured as surface exposed to said measured gas and an atmosphere surface exposed to the atmosphere and at least a portion of said atmosphere surface has an emissivity equal to or lower than 0.3;
- wherein, when a distance from a base end portion of said atmosphere surface to a top portion thereof in an axial direction of said gas sensor is taken as H, said emissivity is set to be equal to or lower than 0.3 in a region corresponding to a distance of 0.6H or more from said base end portion thereof toward said top portion in said axial direction.
Dependencies are inferred from the claim text.