GB1111384A - Microwave apparatus for measuring moisture content - Google Patents

Microwave apparatus for measuring moisture content

Info

Publication number
GB1111384A
GB1111384A GB4813563A GB4813563A GB1111384A GB 1111384 A GB1111384 A GB 1111384A GB 4813563 A GB4813563 A GB 4813563A GB 4813563 A GB4813563 A GB 4813563A GB 1111384 A GB1111384 A GB 1111384A
Authority
GB
United Kingdom
Prior art keywords
sample
moisture content
cavity
dec
holes
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.)
Expired
Application number
GB4813563A
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.)
MICROWAVE INSTR Ltd
Original Assignee
MICROWAVE INSTR 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 MICROWAVE INSTR Ltd filed Critical MICROWAVE INSTR Ltd
Priority to GB4813563A priority Critical patent/GB1111384A/en
Publication of GB1111384A publication Critical patent/GB1111384A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
    • G01N22/04—Investigating moisture content

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (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 Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

1,111,384. Measuring moisture content. MICROWAVE INSTRUMENTS Ltd. and J. BILBROUGH. Dec.4, 1964 [Dec. 5, 1963], No.48135/63. Headings G1N and G1U. The moisture content of a sample is deduced from the change in Q of a microwave resonance cavity upon insertion of the sample into one of two holes 4, 5 located in regions of different electric field strength to provide two sensitivity ranges. The cavity has a tuning piston 13 and the power input waveguide 3 may be matched to the cavity by adjusting screws 14. An arrangement is described in which the source frequency is swept through resonance in a sawtooth waveform and the amplitude vs frequency curve of the detector 7 output is displayed on an oscilloscope. Quartz tubes may replace the sample holes to enable continuous monitoring of a flowing medium. Calibration measurements may be made with a water-free sample.
GB4813563A 1963-12-05 1963-12-05 Microwave apparatus for measuring moisture content Expired GB1111384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4813563A GB1111384A (en) 1963-12-05 1963-12-05 Microwave apparatus for measuring moisture content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4813563A GB1111384A (en) 1963-12-05 1963-12-05 Microwave apparatus for measuring moisture content

Publications (1)

Publication Number Publication Date
GB1111384A true GB1111384A (en) 1968-04-24

Family

ID=10447512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4813563A Expired GB1111384A (en) 1963-12-05 1963-12-05 Microwave apparatus for measuring moisture content

Country Status (1)

Country Link
GB (1) GB1111384A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011185A1 (en) * 1978-11-11 1980-05-28 Bayer Ag Microwave moisture measurement device with commutable measuring range
EP0040805A1 (en) * 1980-05-23 1981-12-02 Philip Morris Incorporated Method of measuring the moisture content of a material
GB2182149A (en) * 1985-10-25 1987-05-07 Coal Ind Improved moisture meter
DE3627966A1 (en) * 1986-02-07 1987-08-13 Freiberg Brennstoffinst Method and device for measuring the phase distribution of unconsolidated bulk goods or consolidated geological cores

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011185A1 (en) * 1978-11-11 1980-05-28 Bayer Ag Microwave moisture measurement device with commutable measuring range
EP0040805A1 (en) * 1980-05-23 1981-12-02 Philip Morris Incorporated Method of measuring the moisture content of a material
US4358731A (en) * 1980-05-23 1982-11-09 Philip Morris Incorporated Apparatus and method for moisture measurement
GB2182149A (en) * 1985-10-25 1987-05-07 Coal Ind Improved moisture meter
US4788853A (en) * 1985-10-25 1988-12-06 Coal Industry (Patents) Limited Moisture meter
GB2182149B (en) * 1985-10-25 1989-12-20 Coal Ind Improved moisture meter
DE3627966A1 (en) * 1986-02-07 1987-08-13 Freiberg Brennstoffinst Method and device for measuring the phase distribution of unconsolidated bulk goods or consolidated geological cores

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