GB1517697A – Measuring cells for measuring electrical conductivity of liquids
– Google Patents
GB1517697A – Measuring cells for measuring electrical conductivity of liquids
– Google Patents
Measuring cells for measuring electrical conductivity of liquids
Info
Publication number
GB1517697A
GB1517697A
GB34210/74A
GB3421074A
GB1517697A
GB 1517697 A
GB1517697 A
GB 1517697A
GB 34210/74 A
GB34210/74 A
GB 34210/74A
GB 3421074 A
GB3421074 A
GB 3421074A
GB 1517697 A
GB1517697 A
GB 1517697A
Authority
GB
United Kingdom
Prior art keywords
electrode
electrodes
voltage
amplifier
liquid
Prior art date
1974-08-02
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
GB34210/74A
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.)
Elster Metering Holdings Ltd
Original Assignee
George Kent 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.)
1974-08-02
Filing date
1974-08-02
Publication date
1978-07-12
1974-08-02
Application filed by George Kent Ltd
filed
Critical
George Kent Ltd
1974-08-02
Priority to GB34210/74A
priority
Critical
patent/GB1517697A/en
1975-07-21
Priority to US05/597,915
priority
patent/US3993945A/en
1975-07-30
Priority to DE2533943A
priority
patent/DE2533943C2/en
1975-08-01
Priority to NLAANVRAGE7509233,A
priority
patent/NL188369C/en
1975-08-01
Priority to JP50093223A
priority
patent/JPS5846698B2/en
1978-07-12
Publication of GB1517697A
publication
Critical
patent/GB1517697A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
G01R27/22—Measuring resistance of fluids
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
G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
G01N27/07—Construction of measuring vessels; Electrodes therefor
Abstract
1517697 Conductivity measurement GEORGE KENT Ltd 22 July 1975 [2 Aug 1974] 34210/74 Heading G1N Liquid conductivity is measured in a cell comprising co-axial annular electrodes by determining the alternating current between two electrodes 1, 4 necessary to maintain constant the voltage between electrodes 2, 3, a fifth electrode 5 being located on the side of electrode 1 remote from the voltage electrodes 2, 3 and connected to electrode 1 by an amplifier which presents a low impedance to electrode 5 and a high impedance to electrode 1. Leakage from the fifth electrode thus connected does not affect the measurement. Preferably a sixth electrode 6, placed on the side of electrode 5 remote from the other electrodes and connected to electrode 4 and earth is also provided as an earth return path for leakage from electrode 5. As shown, the voltage between electrodes 2 and 3 is compared at 26 with a reference 28 and the difference drives voltage controlled generator 16 to alter the current supplied between cell electrodes 1, 4 by secondary 12. The current passes through resistors 18, 20 and the voltage across these, which is a measure of the liquid conductivity is amplified at 36, 38, supplied to phase sensitive rectifier 40 which uses the reference voltage from amplifier 24 as a reference and the output is smoothed at 42. Temperature compensation. Thermistor 34, in parallel with resistor 20, is arranged in the liquid. Alternatively a temperature sensor in the liquid may control the gain of amplifier 36. Range limitation. A portion of the reference voltage may be tapped off from potentiometer 48 and applied to amplifier 38 which then functions as a difference amplifier. This permits improved sensitivity over a small range. Bell construction. The electrode surface is preferably flush with the insulating material of the cell wall. The axial separation between first and fourth, first and fifth, and, fifth and sixth electrodes is preferably equal. The second and third electrodes are preferably symmetrically located between the first and fourth electrodes and mutually spaced by half the first and fourth electrode separation.
GB34210/74A
1974-08-02
1974-08-02
Measuring cells for measuring electrical conductivity of liquids
Expired
GB1517697A
(en)
Priority Applications (5)
Application Number
Priority Date
Filing Date
Title
GB34210/74A
GB1517697A
(en)
1974-08-02
1974-08-02
Measuring cells for measuring electrical conductivity of liquids
US05/597,915
US3993945A
(en)
1974-08-02
1975-07-21
Measuring cells for measuring electrical conductivity of liquids
DE2533943A
DE2533943C2
(en)
1974-08-02
1975-07-30
Measuring cell for determining the electrical conductivity of liquids
NLAANVRAGE7509233,A
NL188369C
(en)
1974-08-02
1975-08-01
MEASURING DEVICE FOR THE ELECTRICAL CONDUCTIVITY OF LIQUIDS.
JP50093223A
JPS5846698B2
(en)
1974-08-02
1975-08-01
Liquid conductivity measuring device
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB34210/74A
GB1517697A
(en)
1974-08-02
1974-08-02
Measuring cells for measuring electrical conductivity of liquids
Publications (1)
Publication Number
Publication Date
GB1517697A
true
GB1517697A
(en)
1978-07-12
Family
ID=10362775
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB34210/74A
Expired
GB1517697A
(en)
1974-08-02
1974-08-02
Measuring cells for measuring electrical conductivity of liquids
Country Status (5)
Country
Link
US
(1)
US3993945A
(en)
JP
(1)
JPS5846698B2
(en)
DE
(1)
DE2533943C2
(en)
GB
(1)
GB1517697A
(en)
NL
(1)
NL188369C
(en)
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Method and device for recognition of different modes of gas-liquid flow in the horizontal pipeline
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Title
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*
1962-10-22
1966-11-01
Honeywell Inc
Electrical conductivity cell and measuring apparatus
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Methods and apparatus for measuring the electrical resistivity of flowing drilling muds
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Conductivity sensor
1974
1974-08-02
GB
GB34210/74A
patent/GB1517697A/en
not_active
Expired
1975
1975-07-21
US
US05/597,915
patent/US3993945A/en
not_active
Expired – Lifetime
1975-07-30
DE
DE2533943A
patent/DE2533943C2/en
not_active
Expired
1975-08-01
JP
JP50093223A
patent/JPS5846698B2/en
not_active
Expired
1975-08-01
NL
NLAANVRAGE7509233,A
patent/NL188369C/en
not_active
IP Right Cessation
Cited By (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2000299B
(en)
*
1977-06-24
1982-03-03
Bactomatic Inc
Detecting metabolic activity
GB2437174A
(en)
*
2006-04-11
2007-10-17
Futuretec Technologies Ltd
Measuring the conductivity of fluid flowing through a conduit
WO2008068484A1
(en)
*
2006-12-06
2008-06-12
Abb Limited
Conductivity sensor
CN101636653B
(en)
*
2006-12-06
2014-07-16
Abb有限公司
Conductivity sensor
US9086357B2
(en)
2006-12-06
2015-07-21
Abb Limited
Conductivity sensor
US9651511B2
(en)
2006-12-06
2017-05-16
Abb Limited
Conductivity sensor
GB2530601A
(en)
*
2014-09-29
2016-03-30
Iphase Ltd
Method and apparatus for monitoring of the multiphase flow in a pipe
GB2534337A
(en)
*
2014-09-29
2016-07-27
Iphase Ltd
Method and apparatus for monitoring of the multiphase flow in a pipe
GB2530601B
(en)
*
2014-09-29
2017-10-18
Iphase Ltd
Method and apparatus for monitoring of the multiphase flow in a pipe
GB2534337B
(en)
*
2014-09-29
2017-10-18
Iphase Ltd
Method and apparatus for monitoring of the multiphase flow in a pipe
RU2648974C1
(en)
*
2016-10-21
2018-03-28
Федеральное государственное бюджетное образовательное учреждение высшего образования «Башкирский государственный университет»
Method and device for recognition of different modes of gas-liquid flow in the horizontal pipeline
Also Published As
Publication number
Publication date
JPS5139096A
(en)
1976-04-01
NL188369C
(en)
1992-06-01
DE2533943A1
(en)
1976-02-19
DE2533943C2
(en)
1985-03-21
US3993945A
(en)
1976-11-23
NL7509233A
(en)
1976-02-04
NL188369B
(en)
1992-01-02
JPS5846698B2
(en)
1983-10-18
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Legal Events
Date
Code
Title
Description
1978-11-15
PS
Patent sealed [section 19, patents act 1949]
1994-03-23
PCNP
Patent ceased through non-payment of renewal fee
Effective date:
19930722
