GB1064174A - Device for measuring the concentration of salt in a liquid - Google Patents
Device for measuring the concentration of salt in a liquidInfo
- Publication number
- GB1064174A GB1064174A GB3304364A GB3304364A GB1064174A GB 1064174 A GB1064174 A GB 1064174A GB 3304364 A GB3304364 A GB 3304364A GB 3304364 A GB3304364 A GB 3304364A GB 1064174 A GB1064174 A GB 1064174A
- Authority
- GB
- United Kingdom
- Prior art keywords
- balance
- resistor
- transistor
- potentiometer
- bridge
- 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
- 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
-
- 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
-
- 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
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)
Abstract
1,064,174. Electrical analysis of liquids; resistance measuring bridges. APPARATENFABRIEK PLAISER N. V. Aug. 13, 1964 [Aug. 14, 1963], No. 33043/64. Headings G1N and G1U. Apparatus for measuring the concentration of salt in a liquid comprises an A. C. bridge circuit 4 having first and second branches 4a, 4b each comprising a diode and a resistor in series, a third branch 4c comprising a resistor and a fourth branch 4d comprising a conductivity cell, wherein the equilibrium of the bridge is effected by adjusting one of the resistors and the out of balance voltage is taken from the connections between respectively 4a, 4b and 4c, 4d and is fed to a transistorized D. C. amplifier having an indicator light in its output circuit. As shown, the out of balance voltage is taken from a potentiometer 7 forming part of each of the first and second branches 4a, 4b and is amplified by a transistor 12 before passing to transistor 17 which conducts when the bridge is out of balance. At the balance point, transistor 17 becomes non-conducting and transistor 18 conducts thereby lighting the indicator light 20. The sensitivity of the apparatus is determined by the value of resistor 21. In operation, the potentiometer 7 is adjusted manually, starting from one end and the salt concentration is deduced from the setting of the potentiometer at balance. Resistor 15 has a negative temperature coefficient to compensate for changes in ambient temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL296634A NL296634A (en) | 1963-08-14 | 1963-08-14 | |
| LU46733 | 1964-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1064174A true GB1064174A (en) | 1967-04-05 |
Family
ID=26639934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3304364A Expired GB1064174A (en) | 1963-08-14 | 1964-08-13 | Device for measuring the concentration of salt in a liquid |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE651544A (en) |
| CH (1) | CH413435A (en) |
| FR (1) | FR1410448A (en) |
| GB (1) | GB1064174A (en) |
| LU (1) | LU46733A1 (en) |
| NL (1) | NL296634A (en) |
-
1963
- 1963-08-14 NL NL296634A patent/NL296634A/xx unknown
-
1964
- 1964-08-07 BE BE651544D patent/BE651544A/xx unknown
- 1964-08-10 LU LU46733D patent/LU46733A1/xx unknown
- 1964-08-12 CH CH1052664A patent/CH413435A/en unknown
- 1964-08-13 FR FR38004719A patent/FR1410448A/en not_active Expired
- 1964-08-13 GB GB3304364A patent/GB1064174A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE651544A (en) | 1964-12-01 |
| FR1410448A (en) | 1965-09-10 |
| LU46733A1 (en) | 1964-10-10 |
| CH413435A (en) | 1966-05-15 |
| NL296634A (en) | 1965-05-25 |
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