GB984418A - Improvements in or relating to electric liquid conductivity measuring arrangements - Google Patents

Improvements in or relating to electric liquid conductivity measuring arrangements

Info

Publication number
GB984418A
GB984418A GB993060A GB993060A GB984418A GB 984418 A GB984418 A GB 984418A GB 993060 A GB993060 A GB 993060A GB 993060 A GB993060 A GB 993060A GB 984418 A GB984418 A GB 984418A
Authority
GB
United Kingdom
Prior art keywords
bridge
liquid
temperature
relating
wiper
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
GB993060A
Inventor
Robert Andrew Sproule
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.)
ELECTRONIC SWITCHGEAR LONDON L
Original Assignee
ELECTRONIC SWITCHGEAR LONDON L
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 ELECTRONIC SWITCHGEAR LONDON L filed Critical ELECTRONIC SWITCHGEAR LONDON L
Priority to GB993060A priority Critical patent/GB984418A/en
Publication of GB984418A publication Critical patent/GB984418A/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
    • 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
    • G01N27/045—Circuits
    • G01N27/046—Circuits provided with temperature compensation

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)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

984,418. Determining physical qualities. ELECTRONIC SWITCHGEAR (LONDON) Ltd. March 21, 1961 [March 21, 1960], No. 9930/60. Heading G1N. In an arrangement for determining the temperature-compensated value of the electrical conductivity of a liquid a pair of electrodes in a measuring cell 10 are connected in one arm of a bridge a b c d and the bridge output is connected to a bridge rebalancing servomotor 36 through a temperature compensating bridge 21, thermistor 25 of which is inserted in the liquid, and an amplifier 20, the position of the wiper on the resistor 15 indicating the desired compensated value. Potentiometers 27 and 29 provide for setting the temperature compensation according to the coefficient of the liquid being tested, and for automatically adjusting for changes in bridge sensitivity as the wiper at point b is moved from balance for compensation purposes. A range change switch is provided. The measurement of other variables compensated for other second variables, such as pressure, is referred to in the Provisional Specification. Specification 984,419 is referred to.
GB993060A 1960-03-21 1960-03-21 Improvements in or relating to electric liquid conductivity measuring arrangements Expired GB984418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB993060A GB984418A (en) 1960-03-21 1960-03-21 Improvements in or relating to electric liquid conductivity measuring arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB993060A GB984418A (en) 1960-03-21 1960-03-21 Improvements in or relating to electric liquid conductivity measuring arrangements

Publications (1)

Publication Number Publication Date
GB984418A true GB984418A (en) 1965-02-24

Family

ID=9881408

Family Applications (1)

Application Number Title Priority Date Filing Date
GB993060A Expired GB984418A (en) 1960-03-21 1960-03-21 Improvements in or relating to electric liquid conductivity measuring arrangements

Country Status (1)

Country Link
GB (1) GB984418A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220381638A1 (en) * 2021-06-01 2022-12-01 Schneider Electric Systems Usa, Inc. Condition detection of pressure transmitter diaphragm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220381638A1 (en) * 2021-06-01 2022-12-01 Schneider Electric Systems Usa, Inc. Condition detection of pressure transmitter diaphragm
US11609141B2 (en) * 2021-06-01 2023-03-21 Schneider Electric Systems Usa, Inc. Condition detection of pressure transmitter diaphragm

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