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
  • G01N21/59—Transmissivity
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/42—Auxiliary equipment or operation thereof
  • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
  • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
• • 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
  • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
  • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
• • 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
  • G01N21/47—Scattering, i.e. diffuse reflection
  • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
  • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
  • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
• • 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
  • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
  • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
  • G01N2021/151—Gas blown
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N2201/00—Features of devices classified in G01N21/00
  • G01N2201/12—Circuits of general importance; Signal processing
  • G01N2201/127—Calibration; base line adjustment; drift compensation
  • G01N2201/12723—Self check capacity; automatic, periodic step of checking

Landscapes

• Chemical & Material Sciences (AREA)
• Biochemistry (AREA)
• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Analytical Chemistry (AREA)
• General Health & Medical Sciences (AREA)
• General Physics & Mathematics (AREA)
• Immunology (AREA)
• Pathology (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Investigating Or Analysing Materials By Optical Means (AREA)
• Optical Measuring Cells (AREA)
• Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=24382218

Family Applications (1)

Country Status (12)

Families Citing this family (60)

Family Cites Families (12)

• 1984
  • 1984-03-30 US US06/595,205 patent/US4583859A/en not_active Expired - Fee Related
• 1985
  • 1985-01-25 KR KR1019850000463A patent/KR900003054B1/ko not_active Expired
  • 1985-02-16 IN IN114/CAL/85A patent/IN161968B/en unknown
  • 1985-03-06 CA CA000475866A patent/CA1261768A/en not_active Expired
  • 1985-03-06 BR BR8500995A patent/BR8500995A/pt not_active IP Right Cessation
  • 1985-03-15 ES ES541327A patent/ES541327A0/es active Granted
  • 1985-03-20 MX MX204693A patent/MX163119B/es unknown
  • 1985-03-29 DE DE8585302194T patent/DE3564344D1/de not_active Expired
  • 1985-03-29 JP JP60063993A patent/JPS60225048A/ja active Granted
  • 1985-03-29 EP EP85302194A patent/EP0159157B1/en not_active Expired
  • 1985-03-29 AU AU40543/85A patent/AU565315B2/en not_active Ceased
• 1989
  • 1989-01-26 HK HK84/89A patent/HK8489A/xx unknown

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