SE9801632L - Sensors for measuring molecular weight variations in air - Google Patents

Sensors for measuring molecular weight variations in air

Info

Publication number
SE9801632L
SE9801632L SE9801632A SE9801632A SE9801632L SE 9801632 L SE9801632 L SE 9801632L SE 9801632 A SE9801632 A SE 9801632A SE 9801632 A SE9801632 A SE 9801632A SE 9801632 L SE9801632 L SE 9801632L
Authority
SE
Sweden
Prior art keywords
sensor
measuring
air
casing
electroacoustic
Prior art date
Application number
SE9801632A
Other languages
Swedish (sv)
Other versions
SE9801632D0 (en
Inventor
Bertil Hoek
Original Assignee
Hoek Instr Ab
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 Hoek Instr Ab filed Critical Hoek Instr Ab
Priority to SE9801632A priority Critical patent/SE9801632L/en
Publication of SE9801632D0 publication Critical patent/SE9801632D0/en
Publication of SE9801632L publication Critical patent/SE9801632L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H5/00—Measuring propagation velocity of ultrasonic, sonic or infrasonic waves, e.g. of pressure waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The sensor comprises a measuring cell containing electroacoustic transmitter and receiver components enclosed within a mantle maintained at a constant temperature by heating elements (8a-8o). DETAILED DESCRIPTION - A sensor for measuring or monitoring mean molecular weight variations in air or other gas mixtures includes at least one electroacoustic component for transmitting and receiving acoustic waves in a measuring cell, and at least one connection is provided between the cell and the location(s) where measuring or monitoring is taking place, allowing gas to pass through but not solid or liquid particles present in the gas. The measuring cell forms an air-filled chamber enclosed by a casing with good thermal conductivity properties, surrounded by at least one thermally insulated mantle. At least one resistive heating element and at least one temperature sensor are in good thermal contact with the casing. At least one electronic unit is electrically connected to the electroacoustic components, heating elements and temperature sensor. The casing is maintained at an essentially constant temperature above the working temperature of the sensor, within a maximum deviation of 0.1 deg. C.
SE9801632A 1998-05-11 1998-05-11 Sensors for measuring molecular weight variations in air SE9801632L (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9801632A SE9801632L (en) 1998-05-11 1998-05-11 Sensors for measuring molecular weight variations in air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9801632A SE9801632L (en) 1998-05-11 1998-05-11 Sensors for measuring molecular weight variations in air

Publications (2)

Publication Number Publication Date
SE9801632D0 SE9801632D0 (en) 1998-05-11
SE9801632L true SE9801632L (en) 1999-11-12

Family

ID=20411251

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9801632A SE9801632L (en) 1998-05-11 1998-05-11 Sensors for measuring molecular weight variations in air

Country Status (1)

Country Link
SE (1) SE9801632L (en)

Also Published As

Publication number Publication date
SE9801632D0 (en) 1998-05-11

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