| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a gas concentration measuring apparatus that can expand each light axis adjustment range of a light emitting section and a light receiving section and also secures a sealing property.SOLUTION: A gas concentration measuring apparatus includes: a light emitting section 110 that emits laser light; a light receiving section 120 that receives the laser light of the light emitting section through gas to be measured; an arithmetic processing section 14 that calculates concentration of the gas to be measured, on the basis of detected output of the light receiving section; and a joint that is connected to at least one of the light emitting section and the light receiving section and includes an inner joint component 11A, an outer joint component 10A and adjustment sections 5 and 7 for adjusting a gap between the inner joint component and the outer joint component. Contact sections 10a and 11a where the inner joint component and the outer joint component contact to each other are formed respectively at the inner joint component and the outer joint component, a spherical surface is formed on at least one contact section 10a, a groove portion 11b is formed at the other contact section 11a and the groove portion is provided with a sealing member 16.</p> |
