发明名称 |
Vapor concentration monitor |
摘要 |
An apparatus for monitoring the concentration of a vapor, such as heavy water, having at least one narrow bandwidth in its absorption spectrum, in a sample gas such as air. The air is drawn into a chamber in which the vapor content is measured by means of its radiation absorption spectrum. High sensitivity is obtained by modulating the wavelength at a relatively high frequency without changing its optical path, while high stability against zero drift is obtained by the low frequency interchange of the sample gas to be monitored and of a reference sample. The variable HDO background due to natural humidity is automatically corrected.
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申请公布号 |
US4033699(A) |
申请公布日期 |
1977.07.05 |
申请号 |
US19750582183 |
申请日期 |
1975.05.30 |
申请人 |
ATOMIC ENERGY OF CANADA LIMITED |
发明人 |
BAYLY, JOHN G.;BOOTH, RONALD J. |
分类号 |
G01N21/35;G01J3/433;G21C17/028;(IPC1-7):G01N21/26 |
主分类号 |
G01N21/35 |
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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