发明名称 |
Air content determination |
摘要 |
<p>Analytical system for determining nitrogen monoxide, nitrogen dioxide and ozone concentrations in air samples. An ultraviolet light source 4 is used to alter the equilibrium between nitrogen dioxide and oxygen on the one hand and nitrogen monoxide and ozone on the other. Dynamic measurement of ozone concentration with time whilst ultraviolet irradiation is pulsed enables each gas concentration to be calculated without requiring input gases to be scrubbed. Apparatus 101 is further provided to provide a controlled flow of gas to a sensor 103 attached to a high altitude balloon whilst sheltering it from the elements and allowing for affects of temperature, said apparatus comprising a shield 104 and a gas conducting means which uses the venturi effect to control air flow or has a hole to allow water to drain without affecting air flow past the sensor. <IMAGE></p> |
申请公布号 |
EP1120649(A3) |
申请公布日期 |
2005.11.02 |
申请号 |
EP20010300776 |
申请日期 |
2001.01.29 |
申请人 |
CAMBRIDGE UNIVERSITY TECHNICAL SERVICES LIMITED |
发明人 |
COX, DR RICHARD ANTHONY;JONES, DR RODERIC LEWIS |
分类号 |
G01N33/00;(IPC1-7):G01N33/00;G01N31/00 |
主分类号 |
G01N33/00 |
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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