发明名称 |
OPTOACOUSTIC GAS SENSOR AND METHOD OF APPLICATION THEREOF |
摘要 |
PROBLEM TO BE SOLVED: To provide a photoacoustic gas sensor suitable for measuring the concentration of different gases containing an explosive gas. SOLUTION: A tubular sensor body 1 comprises a tubular measuring cell 13 having longitudinal axis extending vertically to the longitudinal axis of tubular sensor body 1. Consequently, the length of measuring cell 13 can be varied depending on a desired sensitivity and range of measurement without varying the outside dimensions of sensor body 1. A light source 5 is disposed such that the measuring cell 13 is irradiated with light but a film 2 is not irradiated and thereby no disturbance signal is generated. The gas sensor is made explosion-proof by enclosing the light source 5 and a photodiode for monitoring the light source 5 tightly from the environment. Function of a microphone, light source 5 and photodiode is monitored by analyzing a background signal. |
申请公布号 |
JPH09127066(A) |
申请公布日期 |
1997.05.16 |
申请号 |
JP19960232223 |
申请日期 |
1996.09.02 |
申请人 |
CERBERUS AG |
发明人 |
MARUCHIN FUORUSUTAA;RORUFU PURAISHIYU;MOURAATO BAARAKETSUTO |
分类号 |
G01N29/00;G01N21/00;G01N21/17 |
主分类号 |
G01N29/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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