GB825083A - Improvements in or relating to conductivity measuring systems - Google Patents
Improvements in or relating to conductivity measuring systemsInfo
- Publication number
- GB825083A GB825083A GB114057A GB114057A GB825083A GB 825083 A GB825083 A GB 825083A GB 114057 A GB114057 A GB 114057A GB 114057 A GB114057 A GB 114057A GB 825083 A GB825083 A GB 825083A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- temperature
- resistor
- cell
- liquid
- 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
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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R17/10—AC or DC measuring bridges
- G01R17/105—AC or DC measuring bridges for measuring impedance or resistance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
825,083. Measuring bridges. UNILEVER Ltd. Feb. 20, 1958 [Jan. 11, 1957], No. 1140/57. Class 37. Apparatus for measuring the conductivity of a liquid incorporating automatic compensation for variations in temperature comprises a first bridge consisting of the two parts 1, 2 of a centre-tapped transformer winding, a conductivity cell 4 and a balancing resistor 5, and a second bridge consisting of the same two half windings 1, 2, a thermistor 6 in contact with the liquid in cell 4, and a balancing resistor 7, the first bridge being fed from an A.C. source 3 and the second bridge being fed from the same source via a potentiometer 11 coupled to balancing resistor 5. With the second bridge disconnected, the first bridge is balanced with liquids of different known conductivities, at the same constant temperature, whereby resistor 5 is calibrated. The temperature is then altered and potentiometer 11 and resistor 12 adjusted so that the combined double bridge retains its balance over the desired temperature range. If the temperature-sensitive element 6 and the liquid in cell 4 have temperature coefficients of resistance of opposite sign, elements 6 and 7 are interchanged. In modifications either bridge may be connected between tappings on windings 1, 2.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL100089D NL100089C (en) | 1957-01-11 | ||
| GB114057A GB825083A (en) | 1957-01-11 | 1957-01-11 | Improvements in or relating to conductivity measuring systems |
| DEU5042A DE1058147B (en) | 1957-01-11 | 1958-01-08 | AC double bridge circuit for measuring the conductivity of an electrolyte liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB114057A GB825083A (en) | 1957-01-11 | 1957-01-11 | Improvements in or relating to conductivity measuring systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB825083A true GB825083A (en) | 1959-12-09 |
Family
ID=9716876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB114057A Expired GB825083A (en) | 1957-01-11 | 1957-01-11 | Improvements in or relating to conductivity measuring systems |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1058147B (en) |
| GB (1) | GB825083A (en) |
| NL (1) | NL100089C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3250987A (en) * | 1959-12-24 | 1966-05-10 | Robert H Okada | Hematocrit meter |
| US3259832A (en) * | 1962-10-03 | 1966-07-05 | Gen Motors Corp | Electrical control device |
| US11670447B2 (en) | 2020-04-09 | 2023-06-06 | Hamilton Sundstrand Corporation | Autotransformer rectifier unit system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2173233A (en) * | 1936-07-01 | 1939-09-19 | Siemens Ag | Apparatus for measuring the electric conductivity of liquids |
-
0
- NL NL100089D patent/NL100089C/xx active
-
1957
- 1957-01-11 GB GB114057A patent/GB825083A/en not_active Expired
-
1958
- 1958-01-08 DE DEU5042A patent/DE1058147B/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3250987A (en) * | 1959-12-24 | 1966-05-10 | Robert H Okada | Hematocrit meter |
| US3259832A (en) * | 1962-10-03 | 1966-07-05 | Gen Motors Corp | Electrical control device |
| US11670447B2 (en) | 2020-04-09 | 2023-06-06 | Hamilton Sundstrand Corporation | Autotransformer rectifier unit system |
Also Published As
| Publication number | Publication date |
|---|---|
| NL100089C (en) | |
| DE1058147B (en) | 1959-05-27 |
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