GB2226141B - Remote conductivity sensor - Google Patents

Remote conductivity sensor

Info

Publication number
GB2226141B
GB2226141B GB8928473A GB8928473A GB2226141B GB 2226141 B GB2226141 B GB 2226141B GB 8928473 A GB8928473 A GB 8928473A GB 8928473 A GB8928473 A GB 8928473A GB 2226141 B GB2226141 B GB 2226141B
Authority
GB
United Kingdom
Prior art keywords
conductivity sensor
remote
remote conductivity
sensor
conductivity
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 - Lifetime
Application number
GB8928473A
Other versions
GB8928473D0 (en
GB2226141A (en
Inventor
Francis Tsutomu Ogawa
Jr George Jurgen Eilers
Michael Randolph Manes
Donn Douglas Lobdell
Terry Dean Boucher
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.)
Terumo BCT Inc
Original Assignee
Cobe Laboratories Inc
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
Priority claimed from US06/869,132 external-priority patent/US4740755A/en
Priority claimed from US06/869,087 external-priority patent/US4825168A/en
Application filed by Cobe Laboratories Inc filed Critical Cobe Laboratories Inc
Publication of GB8928473D0 publication Critical patent/GB8928473D0/en
Publication of GB2226141A publication Critical patent/GB2226141A/en
Application granted granted Critical
Publication of GB2226141B publication Critical patent/GB2226141B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G01N27/023—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance where the material is placed in the field of a coil
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
    • A61M1/1601—Control or regulation
    • A61M1/1603—Regulation parameters
    • A61M1/1605—Physical characteristics of the dialysate fluid
    • A61M1/1607—Physical characteristics of the dialysate fluid before use, i.e. upstream of dialyser
    • 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
GB8928473A 1986-05-30 1989-12-18 Remote conductivity sensor Expired - Lifetime GB2226141B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/869,132 US4740755A (en) 1986-05-30 1986-05-30 Remote conductivity sensor having transformer coupling in fluid flow path
US06/869,087 US4825168A (en) 1986-05-30 1986-05-30 Remote conductivity sensor using square wave excitation

Publications (3)

Publication Number Publication Date
GB8928473D0 GB8928473D0 (en) 1990-02-21
GB2226141A GB2226141A (en) 1990-06-20
GB2226141B true GB2226141B (en) 1990-10-17

Family

ID=27128091

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8711173A Expired - Lifetime GB2191293B (en) 1986-05-30 1987-05-12 Remote conductivity sensor
GB8928473A Expired - Lifetime GB2226141B (en) 1986-05-30 1989-12-18 Remote conductivity sensor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8711173A Expired - Lifetime GB2191293B (en) 1986-05-30 1987-05-12 Remote conductivity sensor

Country Status (4)

Country Link
JP (1) JPH076947B2 (en)
DE (1) DE3718111A1 (en)
FR (1) FR2599515B1 (en)
GB (2) GB2191293B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5612622A (en) * 1994-12-28 1997-03-18 Optical Solutions, Inc. Apparatus for identifying particular entities in a liquid using electrical conductivity characteristics
DE19823836C2 (en) * 1998-05-28 2000-05-04 Fresenius Medical Care De Gmbh Device and method for non-contact measurement of the conductivity of a liquid in a flow channel
JP2001147218A (en) * 1999-11-22 2001-05-29 T & C Technical:Kk Electrodeless sensor
DE102005029047B4 (en) 2005-06-21 2007-06-21 Miele & Cie. Kg Sensor device and method for producing a sensor device
JP2007327901A (en) * 2006-06-09 2007-12-20 Invensys Systems Inc Nonmetal flowing-water type electroless conductive sensor, and leak detector
DE102011002766A1 (en) 2011-01-17 2012-07-19 Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG Measuring arrangement for determining an electrical conductivity of a measuring liquid
JP6423579B2 (en) * 2013-02-04 2018-11-14 株式会社 堀場アドバンスドテクノ Conductivity meter and method for correcting the measured value

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1001379A (en) * 1946-06-11 1965-08-18 Schlumberger Prospection Improvements in or relating to a method of and apparatus for measuring conductivities through induction
GB1395493A (en) * 1971-06-16 1975-05-29 Secr Defence Apparatus for controlling the conductivity of an electro lyte
GB1543011A (en) * 1976-02-23 1979-03-28 Ahi Operations Ltd Detectors of mastitis in cows and/or methods of using same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB695058A (en) * 1951-05-03 1953-08-05 Fielden Electronics Ltd Improvements relating to the measurement of conductivity of liquids
GB831692A (en) * 1956-11-15 1960-03-30 Wayne Kerr Lab Ltd Improvements in or relating to the measurement of the electrical conductance of liquids
DE1129232B (en) * 1960-02-12 1962-05-10 Siemens Ag Device for the electrodeless measurement of the electrical conductivity of fluids flowing in pipelines
US3404336A (en) * 1965-07-26 1968-10-01 Beckman Instruments Inc Apparatus for measuring electrical conductivity of a fluid
US3566841A (en) * 1969-07-11 1971-03-02 Research Corp Milk monitor and system
US3603873A (en) * 1970-01-14 1971-09-07 Nus Corp Conductivity sensor
DE2108771C3 (en) * 1970-02-27 1981-11-12 Smiths Industries Ltd., London Device for detecting particles as they pass along a continuous path
FR2266891B1 (en) * 1974-04-05 1978-11-17 Citroen Sa
JPS5236990U (en) * 1975-09-08 1977-03-16
US4138639A (en) * 1977-07-14 1979-02-06 Hutchins Thomas B Fluid conductivity measurement
DE2822943A1 (en) * 1978-05-26 1979-11-29 Tesch Gmbh & Co Kg Probe which measures electrical conductivity of liq. - uses coils to generate and detect induced voltage in liq.
JPS60190873A (en) * 1984-03-10 1985-09-28 Japan Organo Co Ltd Electromagnetic type conductivity meter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1001379A (en) * 1946-06-11 1965-08-18 Schlumberger Prospection Improvements in or relating to a method of and apparatus for measuring conductivities through induction
GB1395493A (en) * 1971-06-16 1975-05-29 Secr Defence Apparatus for controlling the conductivity of an electro lyte
GB1543011A (en) * 1976-02-23 1979-03-28 Ahi Operations Ltd Detectors of mastitis in cows and/or methods of using same

Also Published As

Publication number Publication date
GB2191293A (en) 1987-12-09
DE3718111C2 (en) 1989-06-15
GB8711173D0 (en) 1987-06-17
GB2191293B (en) 1990-10-17
FR2599515A1 (en) 1987-12-04
GB8928473D0 (en) 1990-02-21
FR2599515B1 (en) 1990-04-06
JPH076947B2 (en) 1995-01-30
JPS631961A (en) 1988-01-06
GB2226141A (en) 1990-06-20
DE3718111A1 (en) 1987-12-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050512