JPS5754843A - Infrared ray absorption type humidity measuring device - Google Patents

Infrared ray absorption type humidity measuring device

Info

Publication number
JPS5754843A
JPS5754843A JP13117380A JP13117380A JPS5754843A JP S5754843 A JPS5754843 A JP S5754843A JP 13117380 A JP13117380 A JP 13117380A JP 13117380 A JP13117380 A JP 13117380A JP S5754843 A JPS5754843 A JP S5754843A
Authority
JP
Japan
Prior art keywords
infrared ray
sample cell
range
measuring device
absorbed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13117380A
Other languages
Japanese (ja)
Inventor
Tsunehiko Araki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP13117380A priority Critical patent/JPS5754843A/en
Publication of JPS5754843A publication Critical patent/JPS5754843A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/37—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using pneumatic detection

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To make an infrared ray absorption type humidity measuring device at a lower cost without use of a costly solid infrared ray detector and a narrow band filter by employing an optical sound cell for the infrared ray detector. CONSTITUTION:An infrared ray having a wide length distribution from an infrared ray source 2 enters a window 5 of a sample cell 4 through a chopper 3. When H2O is not present in the sample cell 4, it does not absorb any of infrared rays. After the infrared rays pass a low pass filter 13, the ones of 2.7mu range are absorbed with an optical sound cell 10 filled with CO2 at a high concentration and an electric output is indicated on a meter 9 corresponding to CO2 absorbed energy of 2.7mu range. On the other hand, when H2O is present in the sample cell 4, the infrared rays of 2.7mu range are absorbed in the sample cell 4 depending on the concentration of H2O by a Lanbert's and Bell's law to reduce the electric output. This enables the measurement of humidity with an inexpensive equipment.
JP13117380A 1980-09-19 1980-09-19 Infrared ray absorption type humidity measuring device Pending JPS5754843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13117380A JPS5754843A (en) 1980-09-19 1980-09-19 Infrared ray absorption type humidity measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13117380A JPS5754843A (en) 1980-09-19 1980-09-19 Infrared ray absorption type humidity measuring device

Publications (1)

Publication Number Publication Date
JPS5754843A true JPS5754843A (en) 1982-04-01

Family

ID=15051709

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13117380A Pending JPS5754843A (en) 1980-09-19 1980-09-19 Infrared ray absorption type humidity measuring device

Country Status (1)

Country Link
JP (1) JPS5754843A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0612949U (en) * 1991-12-30 1994-02-18 日新電機株式会社 Gas concentration measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0612949U (en) * 1991-12-30 1994-02-18 日新電機株式会社 Gas concentration measuring device

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