GB1103275A - Testing the stability of suspensions in liquid media - Google Patents
Testing the stability of suspensions in liquid mediaInfo
- Publication number
- GB1103275A GB1103275A GB488564A GB488564A GB1103275A GB 1103275 A GB1103275 A GB 1103275A GB 488564 A GB488564 A GB 488564A GB 488564 A GB488564 A GB 488564A GB 1103275 A GB1103275 A GB 1103275A
- Authority
- GB
- United Kingdom
- Prior art keywords
- emulsion
- stability
- output
- oscillator
- liquid
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth 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)
Abstract
1,103,275. Testing stability of suspensions in liquid media, electrically. NATIONAL RESEARCH DEVELOPMENT CORPORATION. May 3, 1965 [Feb. 5, 1964], No.4885/64. Heading G1N. The stability of a suspension of a substance in a liquid medium which is not highly conductive (e.g. an emulsion of oil in water) is determined by the change in the capacitance of a capacitor of which the emulsion forms the dielectric. The dielectric constant of the substance should differ appreciably from that of the liquid medium. As shown a capacitor cell comprises coaxially disposed tubular electrodes 6, 7, formed by silver deposition on two coaxial cylindrical glass walls which define an annular chamber 4 to which the test emulsion is admitted by an entry 5. The capacitor cell is connected in parallel with a variable capacitor C18 in the tuning circuit of an oscillator 16, the output of which together with the output of a stable crystal oscillator 17 is fed to a mixer. The mixer output is connected to a loudspeaker or visual indicator 20. With the space between electrodes completely filled with emulsion C18 is adjusted until the two oscillator frequencies are equal and the mixer output is zero. As the emulsion gradually separates with time into its constituents causing a change in the cell capacitance and consequent change in frequency of oscillator 16, an output signal is produced by the loudspeaker. The amount of adjustment of C18 over a measured period of time, necessary to silence the speaker, gives a measure of the stability of the emulsion. For a suspension of solid particles in a liquid the upper or lower part of the depth may be between the electrodes dependent on whether the dielectric constant of the solid particles is respectively higher or lower than that of the liquid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB488564A GB1103275A (en) | 1964-02-05 | 1964-02-05 | Testing the stability of suspensions in liquid media |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB488564A GB1103275A (en) | 1964-02-05 | 1964-02-05 | Testing the stability of suspensions in liquid media |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1103275A true GB1103275A (en) | 1968-02-14 |
Family
ID=9785680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB488564A Expired GB1103275A (en) | 1964-02-05 | 1964-02-05 | Testing the stability of suspensions in liquid media |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1103275A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2125553A (en) * | 1982-08-10 | 1984-03-07 | Standard Telephones Cables Ltd | Multi-purpose sensor/detector for fluid |
US4470300A (en) * | 1981-04-10 | 1984-09-11 | Nissan Motor Company, Limited | Apparatus for and method of determining a capacitance |
GB2211618A (en) * | 1987-12-19 | 1989-07-05 | Koerber Ag | High frequency oscillatory circuit for moisture measurement |
GB2306660A (en) * | 1995-07-28 | 1997-05-07 | Christopher John Collister | Fluid electrical measurement apparatus and method |
-
1964
- 1964-02-05 GB GB488564A patent/GB1103275A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4470300A (en) * | 1981-04-10 | 1984-09-11 | Nissan Motor Company, Limited | Apparatus for and method of determining a capacitance |
GB2125553A (en) * | 1982-08-10 | 1984-03-07 | Standard Telephones Cables Ltd | Multi-purpose sensor/detector for fluid |
GB2211618A (en) * | 1987-12-19 | 1989-07-05 | Koerber Ag | High frequency oscillatory circuit for moisture measurement |
GB2211618B (en) * | 1987-12-19 | 1992-07-15 | Koerber Ag | High frequency oscillatory circuit device |
GB2306660A (en) * | 1995-07-28 | 1997-05-07 | Christopher John Collister | Fluid electrical measurement apparatus and method |
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