发明名称 |
NON-DISPERSIVE IR MEASUREMENT OF GASES USING AN OPTICAL FILTER |
摘要 |
A method and apparatus are described for determining the safety of a gas mixture containing flammable components such as methane together with ethane or other hydrocarbon, together with a diluent gas. The method comprises the filtered infrared spectroscopy of the gas mixture in a gas cell (10) using a filter (16). The peak transmission wavelength (.lambda.max) and bandwidth of the filter (16) are so chosen to provide an output, when an infrared light source (42) having a flat wavelength distribution is used, indicative of the %LEL of the gas mixture, within a predetermined tolerance. The filter may be a gas correlation filter containing a mixture of methane and ethane, together with a diluent gas.
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申请公布号 |
CA2411284(C) |
申请公布日期 |
2012.05.29 |
申请号 |
CA20012411284 |
申请日期 |
2001.05.30 |
申请人 |
LATTICE INTELLECTUAL PROPERTY LTD. |
发明人 |
HODGKINSON, ELIZABETH JANE |
分类号 |
G01N21/35;G01N33/00;G01J3/12;G01N21/61;G02B5/20;G02B5/28 |
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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