GB971507A - Improvements in or relating to electrical measuring apparatus - Google Patents
Improvements in or relating to electrical measuring apparatusInfo
- Publication number
- GB971507A GB971507A GB1881661D GB1881661D GB971507A GB 971507 A GB971507 A GB 971507A GB 1881661 D GB1881661 D GB 1881661D GB 1881661 D GB1881661 D GB 1881661D GB 971507 A GB971507 A GB 971507A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- filament
- parameter
- measured
- temperature
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
- G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
-
- 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
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
- G01N27/185—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested using a catharometer
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
971, 507. Measuring electrically; bridge measurements. CHARBONNAGES DE FRANCE. May 24, 1961 [June 20, 1960], No. 18816/61. Headings G1N and G1U. An electrical circuit for use with apparatus of the kind in which the temperature of an electrical detector filament is a function of a parameter to be measured of a medium in contact with the filament includes a Wheatstone bridge and a current supply source G which supplies constant current to the bridge. Two arms of the bridge are formed by the detector filament 1 and a comparator filament 2 in series between the output terminals A, B of the current supply source, and the other two arms of the bridge include resistances 3, 4 sufficiently high to ensure that the current through the detector filament remains substantially constant, so that the temperature of the detector filament remains a direct function of the parameter to be measured. The parameter being measured may be for example the temperature of a chemical reaction) or the apparatus may be used for determining the amount of a particular gas in a mixture of two or more gases. The supply circuitry G may take the form wherein a resistor 9 in the emitter circuit of a transistor 7 and the zener voltage of a zener diode 11 together define the constant current. A battery may be used instead of the Zener diode circuit to provide a defining voltage (Fig. 2 not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR830540A FR1268518A (en) | 1960-06-20 | 1960-06-20 | Improvement in methods and devices for measuring the temperature of a filament |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB971507A true GB971507A (en) | 1964-09-30 |
Family
ID=39273869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1881661D Expired GB971507A (en) | 1960-06-20 | 1961-05-24 | Improvements in or relating to electrical measuring apparatus |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE605128A (en) |
| FR (1) | FR1268518A (en) |
| GB (1) | GB971507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2263784A (en) * | 1990-01-09 | 1993-08-04 | Richard George Vivian Doble | High frequency voltage/current-measuring circuit |
-
1960
- 1960-06-20 FR FR830540A patent/FR1268518A/en not_active Expired
-
1961
- 1961-05-24 GB GB1881661D patent/GB971507A/en not_active Expired
- 1961-06-19 BE BE605128A patent/BE605128A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2263784A (en) * | 1990-01-09 | 1993-08-04 | Richard George Vivian Doble | High frequency voltage/current-measuring circuit |
| GB2263784B (en) * | 1990-01-09 | 1994-02-16 | Richard George Vivian Doble | High frequency measuring circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| BE605128A (en) | 1961-12-19 |
| FR1268518A (en) | 1961-08-04 |
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