GB1111695A - Arrangements for determining the moisture content of granular materials,more particularly moulding sand for foundries - Google Patents
Arrangements for determining the moisture content of granular materials,more particularly moulding sand for foundriesInfo
- Publication number
- GB1111695A GB1111695A GB1812465A GB1812465A GB1111695A GB 1111695 A GB1111695 A GB 1111695A GB 1812465 A GB1812465 A GB 1812465A GB 1812465 A GB1812465 A GB 1812465A GB 1111695 A GB1111695 A GB 1111695A
- Authority
- GB
- United Kingdom
- Prior art keywords
- moisture content
- cell
- sand
- capacitance
- loss resistance
- 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
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
-
- 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
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
- G01N27/225—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity by using hygroscopic materials
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)
Abstract
1,111,695. Measuring moisture content of materials electrically. MUSZERIPARI KUTATO INTEZET. April 29, 1965 [May 14, 1964], No.18124/65. Heading G1N. The moisture content of a moulding sand, for foundry work, is measured in a measuring cell (not shown) which has a mechanical means to compress the sand to a degree wherein the value of the filling factor corresponds to its required condition when moulding, and the sand in the cell forms the dielectric of a capacitor connected in a tuning circuit of an oscillator the magnitude of the direct current feed to which is taken as a measure of moisture content. In order to reduce the effect of the loss resistance due to moisture on the circuit Q and on the measurements, the cell is connected in the tuning circuit as shown in Fig. 1, where C m , R m represent the capacitance and loss resistance of the cell and C 1 , R 1 represent the capacitance and loss resistance of a low loss standard capacitor, in series with the cell across an inductor L. The variation in capacitance of the cell in proportion to the moisture content results in a corresponding variation in the direct current supplied to the oscillator, which current is measured in an ammeter calibrated directly in percentage moisture content.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HUMU000297 | 1964-05-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1111695A true GB1111695A (en) | 1968-05-01 |
Family
ID=10999642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1812465A Expired GB1111695A (en) | 1964-05-14 | 1965-04-29 | Arrangements for determining the moisture content of granular materials,more particularly moulding sand for foundries |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT264155B (en) |
| CH (1) | CH429239A (en) |
| GB (1) | GB1111695A (en) |
| SE (1) | SE307684B (en) |
-
1965
- 1965-03-23 CH CH411565A patent/CH429239A/en unknown
- 1965-03-23 AT AT262465A patent/AT264155B/en active
- 1965-04-29 GB GB1812465A patent/GB1111695A/en not_active Expired
- 1965-05-14 SE SE638065A patent/SE307684B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE307684B (en) | 1969-01-13 |
| CH429239A (en) | 1967-01-31 |
| AT264155B (en) | 1968-08-26 |
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