Method of cleaning the reflector mirror in an optical dew point

Details Method of cleaning the reflector mirror in an optical dew point Method of cleaning the reflector mirror in an optical dew point

1994-09-01

1995-11-28

Gutierrez, Diego F. F.

Thermal measuring and testing

Temperature measurement

Combined with diverse art device

134 11, 134 31, 374 17, 374 20, G01N 2568, G01N 2147, G01N 2155, B08B 500

Patent

active

054701546

ABSTRACT:
A method of cleaning a reflector mirror in an optical dew point meter that measures the dew point or frost point of a sample gas by a process including the steps of bringing the sample gas into contact with the reflector mirror whose temperature is variable, projecting condensed rays of light or laser light onto said reflector mirror, and detecting the change in the intensity of scattered light and/or reflected light on account of the dew or frost formed on said reflector mirror, characterized by bringing a CO.sub.2 gas or a CO.sub.2 containing gas into contact with the reflector while the latter is in a cooled state, thereby condensing CO.sub.2 on the surface of the reflector mirror, and the subsequent step of heating the reflector mirror to vaporize the CO.sub.2 is dischosed.

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patent: 5052818 (1991-10-01), Nishizawa et al.
patent: 5068040 (1991-11-01), Jackson
patent: 5201960 (1993-04-01), Starov

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