MIRROR-SURFACE CONDENSING DEW-POINT INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide a mirror-surface condensing dew-point instrument that can accurately measure the dew point of a gas having a high dew point. SOLUTION: This mirror-surface condensing dew-point instrument has a reflecting mirror positioned in a housing forming the flow passage of a measuring gas. In this instrument, the influence of a gas to be measured upon a reference light measuring system and a reflected light measuring system is eliminated by arranging the systems on the outside of the housing. The reference light measuring system is composed of a first light source section and a first light receiving section which receives straight advancing light from the light source section. The reflected light measuring system is composed of a second light source section which sends light to the reflecting mirror, and a second light receiving section which receives the reflected light from the reflecting mirror. COPYRIGHT: (C)2003,JPO