GB1255091A - Improved moisture detector and analyzer - Google Patents

Improved moisture detector and analyzer

Info

Publication number
GB1255091A
GB1255091A GB74369A GB74369A GB1255091A GB 1255091 A GB1255091 A GB 1255091A GB 74369 A GB74369 A GB 74369A GB 74369 A GB74369 A GB 74369A GB 1255091 A GB1255091 A GB 1255091A
Authority
GB
United Kingdom
Prior art keywords
frequency
crystal
change due
oscillator
salt
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
GB74369A
Inventor
William Henry King Jr
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Esso Research and Engineering Co
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 Exxon Research and Engineering Co, Esso Research and Engineering Co filed Critical Exxon Research and Engineering Co
Priority to GB74369A priority Critical patent/GB1255091A/en
Publication of GB1255091A publication Critical patent/GB1255091A/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
    • 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
    • G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/025—Change of phase or condition
    • G01N2291/0256—Adsorption, desorption, surface mass change, e.g. on biosensors

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (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 Ultrasonic Waves (AREA)

Abstract

1,255,091. Piezoelectric elements. ESSO RESEARCH & ENG. CO. 6 Jan., 1969, No. 743/69. Heading H1E. [Also in Divisions C1 and G1] Apparatus for measuring moisture content comprises a piezo-electric crystal coated with a deliquescent salt. The crystal forms the frequency determining circuit of an oscillator, Fig. 1 (not shown), so that the frequency is determined in accordance with ambient relative humidity. In use a test oscillator is beat with a reference and the difference frequency component integrated and indicated. The salt is lithium or calcium chloride or lithium bromide and is of thickness 70-200 Angstroms. Fig. 2 gives results for three detectors, #F 0 is the frequency change due to the dry coating, #F is the further change due to moisture absorption, the natural resonant frequency of the crystal being about 9 MHz.
GB74369A 1969-01-06 1969-01-06 Improved moisture detector and analyzer Expired GB1255091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB74369A GB1255091A (en) 1969-01-06 1969-01-06 Improved moisture detector and analyzer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB74369A GB1255091A (en) 1969-01-06 1969-01-06 Improved moisture detector and analyzer

Publications (1)

Publication Number Publication Date
GB1255091A true GB1255091A (en) 1971-11-24

Family

ID=9709753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB74369A Expired GB1255091A (en) 1969-01-06 1969-01-06 Improved moisture detector and analyzer

Country Status (1)

Country Link
GB (1) GB1255091A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009153406A1 (en) * 2008-06-18 2009-12-23 Valtion Teknillinen Tutkimuskeskus Indicator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009153406A1 (en) * 2008-06-18 2009-12-23 Valtion Teknillinen Tutkimuskeskus Indicator

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