GB612155A - Improvements in direct reading ph meters - Google Patents

Improvements in direct reading ph meters

Info

Publication number
GB612155A
GB612155A GB1438546A GB1438546A GB612155A GB 612155 A GB612155 A GB 612155A GB 1438546 A GB1438546 A GB 1438546A GB 1438546 A GB1438546 A GB 1438546A GB 612155 A GB612155 A GB 612155A
Authority
GB
United Kingdom
Prior art keywords
meter
valve
grid
reading
triode
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
GB1438546A
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.)
EDWARD JAMES TUNNICLIFFE
Original Assignee
EDWARD JAMES TUNNICLIFFE
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 EDWARD JAMES TUNNICLIFFE filed Critical EDWARD JAMES TUNNICLIFFE
Priority to GB1438546A priority Critical patent/GB612155A/en
Publication of GB612155A publication Critical patent/GB612155A/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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4166—Systems measuring a particular property of an electrolyte
    • G01N27/4167—Systems measuring a particular property of an electrolyte pH

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

612,155. Measuring physical qualities. WILKINS, S. R., and TUNNICLIFFE, E. J. May 13, 1946, No. 14385. [Class 37] A direct reading pH meter comprises a cathode coupled bridge type valve voltmeter to which a glass cell electrode is connected via Sc. Triode A functions as a millivolt measuring valve, while triode B provides the off-set voltage for reference, the out-of-balance current being read on a meter M direct in pH units. Two separate potential dividers are provided across the stabilised D.C. supply for the grids of the two valves A and B. The grid of A is normally returned to a point x via a switch SW2, x being closed to give a linear operation of the valve A without grid current flowing. The grid of valve B is returned to a point y of the second potential divider via a switch SW3, y being on a potentiometer Z2 so that the two anode currents may be balanced for a nil reading of the meter M. A further potentiometer T2 provides a backing-off voltage when the ganged switches are in position R2, such that the reading of meter M is reduced to zero when the voltage input corresponds to 7 pH, thus extending the range of the meter to read 7-15 pH on position R2. The position Z is provided for zero calibration when the cell is replaced in the grid circuit of valve A by a high resistance H.
GB1438546A 1946-05-13 1946-05-13 Improvements in direct reading ph meters Expired - Lifetime GB612155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1438546A GB612155A (en) 1946-05-13 1946-05-13 Improvements in direct reading ph meters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1438546A GB612155A (en) 1946-05-13 1946-05-13 Improvements in direct reading ph meters

Publications (1)

Publication Number Publication Date
GB612155A true GB612155A (en) 1948-11-09

Family

ID=10040229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1438546A Expired - Lifetime GB612155A (en) 1946-05-13 1946-05-13 Improvements in direct reading ph meters

Country Status (1)

Country Link
GB (1) GB612155A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972102A (en) * 1954-12-31 1961-02-14 Dubois Jacques Emile Method and device for the titration of various solutions and similar purposes
DE1107818B (en) * 1958-03-21 1961-05-31 Optica S A Voltmeter with bridge circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972102A (en) * 1954-12-31 1961-02-14 Dubois Jacques Emile Method and device for the titration of various solutions and similar purposes
DE1107818B (en) * 1958-03-21 1961-05-31 Optica S A Voltmeter with bridge circuit

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