FR2410819A1 - Biological substance cell percentage or volume measuring device - has two currents of different frequencies simultaneously applied to electrodes and difference in impedance compared with reference data - Google Patents
Biological substance cell percentage or volume measuring device - has two currents of different frequencies simultaneously applied to electrodes and difference in impedance compared with reference dataInfo
- Publication number
- FR2410819A1 FR2410819A1 FR7737424A FR7737424A FR2410819A1 FR 2410819 A1 FR2410819 A1 FR 2410819A1 FR 7737424 A FR7737424 A FR 7737424A FR 7737424 A FR7737424 A FR 7737424A FR 2410819 A1 FR2410819 A1 FR 2410819A1
- Authority
- FR
- France
- Prior art keywords
- electrodes
- difference
- different frequencies
- simultaneously applied
- currents
- 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.)
- Granted
Links
Classifications
-
- 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
- G01N33/02—Food
-
- 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
Abstract
The percentage or vol. of cells is biological medium is determined by measuring variation of electrical impedance. Different frequencies are simultaneously applied to electrodes and difference in impedance compared with reference values. A probe (1) has two electrodes (2, 3) one of which is grounded. The other electrode is coupled to two independent circuits (4a, 4b) each comprising an oscillator (5) and measuring circuit (6) with an amplifier (7) connected to a detector (8). The detector outputs are applied to differential input amplifier with comparators (11) at the output. Luminous indicators (12) provide warning of level.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7737424A FR2410819A1 (en) | 1977-12-05 | 1977-12-05 | Biological substance cell percentage or volume measuring device - has two currents of different frequencies simultaneously applied to electrodes and difference in impedance compared with reference data |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7737424A FR2410819A1 (en) | 1977-12-05 | 1977-12-05 | Biological substance cell percentage or volume measuring device - has two currents of different frequencies simultaneously applied to electrodes and difference in impedance compared with reference data |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2410819A1 true FR2410819A1 (en) | 1979-06-29 |
FR2410819B1 FR2410819B1 (en) | 1981-12-18 |
Family
ID=9198751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7737424A Granted FR2410819A1 (en) | 1977-12-05 | 1977-12-05 | Biological substance cell percentage or volume measuring device - has two currents of different frequencies simultaneously applied to electrodes and difference in impedance compared with reference data |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2410819A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1253423A2 (en) * | 2001-04-27 | 2002-10-30 | Nte, S.A. | Method and apparatus for obtaining physical and/or chemical characteristics of a biological medium |
WO2010044080A2 (en) | 2008-10-17 | 2010-04-22 | Consejo Nacional De Investigaciones Cientificas Y Tecnicas (Conicet) | Procedure to estimate organoleptic parameters of tissues of animal origin and device for carrying out same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1344459A (en) * | 1962-10-18 | 1963-11-29 | Method and apparatus for the electrical study of living organisms | |
US3255411A (en) * | 1962-02-21 | 1966-06-07 | Industrial Nucleonics Corp | System and method for measuring a property of a dielectric material by applying signals at two different frequencies to a capacitance probe and measuring the difference in output signals while maintaining one output signal constant |
US4058766A (en) * | 1976-06-21 | 1977-11-15 | Agridustrial Electronics, Inc. | Multiple-frequency permittivity tester |
-
1977
- 1977-12-05 FR FR7737424A patent/FR2410819A1/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3255411A (en) * | 1962-02-21 | 1966-06-07 | Industrial Nucleonics Corp | System and method for measuring a property of a dielectric material by applying signals at two different frequencies to a capacitance probe and measuring the difference in output signals while maintaining one output signal constant |
FR1344459A (en) * | 1962-10-18 | 1963-11-29 | Method and apparatus for the electrical study of living organisms | |
US4058766A (en) * | 1976-06-21 | 1977-11-15 | Agridustrial Electronics, Inc. | Multiple-frequency permittivity tester |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1253423A2 (en) * | 2001-04-27 | 2002-10-30 | Nte, S.A. | Method and apparatus for obtaining physical and/or chemical characteristics of a biological medium |
EP1253423A3 (en) * | 2001-04-27 | 2004-12-15 | Nte, S.A. | Method and apparatus for obtaining physical and/or chemical characteristics of a biological medium |
WO2010044080A2 (en) | 2008-10-17 | 2010-04-22 | Consejo Nacional De Investigaciones Cientificas Y Tecnicas (Conicet) | Procedure to estimate organoleptic parameters of tissues of animal origin and device for carrying out same |
Also Published As
Publication number | Publication date |
---|---|
FR2410819B1 (en) | 1981-12-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |