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公开(公告)号:US06781695B2
公开(公告)日:2004-08-24
申请号:US09964242
申请日:2001-09-26
Applicant: Richard Hovan , Stuart F. Metcalfe , Derek D. Stuart
Inventor: Richard Hovan , Stuart F. Metcalfe , Derek D. Stuart
IPC: G01N2100
CPC classification number: G01N21/59 , G01N21/538 , G01N21/85 , G01N2201/06146
Abstract: An improved light source for use in an opacity monitor (transmissometer) that reduces the variation in light intensity across a projected light beam to enable a more accurate and stable method for measuring the opacity of gases in a stack/duct, especially at low values (e.g.,
Abstract translation: 用于不透明度监测器(透射计)的改进的光源,其减少投影光束的光强度的变化,以便能够更准确和稳定地测量堆/管道中的气体的不透明度,尤其是在低值处 例如,<10%)的不透明度,而在特定的性能要求下运行。