GB830077A - Improvements in or relating to moisture meters - Google Patents
Improvements in or relating to moisture metersInfo
- Publication number
- GB830077A GB830077A GB36682/55A GB3668255A GB830077A GB 830077 A GB830077 A GB 830077A GB 36682/55 A GB36682/55 A GB 36682/55A GB 3668255 A GB3668255 A GB 3668255A GB 830077 A GB830077 A GB 830077A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- hygroscopic
- disc
- humidity
- solution
- 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
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
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)
- Compositions Of Macromolecular Compounds (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
830,077. Electric indicating systems. ZURCHER PAPIER.FABRIK AN DER SIHL. Dec. 21, 1955 [Dec. 23, 1954; Jan. 7, 1955], No. 36682/55. Class 40 (1). [Also in Group XXXVI] A moisture meter comprises a hydroscopic element whose resistance is measured and which is made from a viscous mixture of a solution of a hydroscopic salt and at least one finely divided or granulated electrically non-conducting filler which is insoluble in the solution. A construction of meter is shown in Fig. 3 in which the hyposcopic layer (for construction of which see below) is applied by brushing to a disc-shaped insulating support 15a which may consist of glass quartz or porcelain and which carries electrodes 16, 17 of precious metal making contact with the hygroscopic layer. A similar layer 18a for comparison purposes is situated on the upper side of disc 15, which is supported by elastically yielding sealing rings 33, 34 in a metal block 13a so that a hollow compartment 14a is formed below the lower layer 18 and a hermetically sealed compartment 35 above layer 18a. The upper compartment contains a humidity buffer 37, e.g. of potassium carbonate contained in a vessel 36 and held in chamber 35 by leaf springs. Below the lower hygroscopic layer is a direct filter 50 of powdered quartz mixed with paraffin and toluol and sprayed on a wire mesh, and a perforated disc provided for mechanical protection. The substance 11 under test is allowed to stand on metal base 11 to take up the temperature of the base and the gauge is then positioned on the substance. Elements 18, 18a form opposite arms of an A.C. bridge and unbalance is indicated by meter 52 connected to a slider on resistor 51 forming two arms of the bridge. In the arrangement of Fig. 1 (not shown), a single hygroscopic element is used and cavities containing humidity buffers are provided in the base-plate. An arrangement is also described (Figs. 4 and 5, not shown) for measuring the humidity of air in which a disc-shaped member containing the sensitive elements is attached at the edge to a handle, one of the sensitive elements being sealed in a rear compartment with a humidity buffer for by soaking felt or blotting paper in a calcium chloride solution. Preparation of hygroscopic layer.-The layer consists of a solution of a hygroscopic salt or salts, e.g. zinc chloride, lithium chloride in admixture with a finely divided or granulated inert filler, e.g. barium sulphate titanium dioxide powdered quartz, a powdered synthetic resin insoluble in water or a mixture of two or more such substances. The mixture may also contain thickening means such as gelatine or a synthetic resin or resins soluble in water and or a wetting agent or agents.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH830077X | 1954-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB830077A true GB830077A (en) | 1960-03-09 |
Family
ID=4540237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36682/55A Expired GB830077A (en) | 1954-12-23 | 1955-12-21 | Improvements in or relating to moisture meters |
Country Status (4)
Country | Link |
---|---|
CH (2) | CH329431A (en) |
DE (2) | DE1096082B (en) |
FR (1) | FR1140929A (en) |
GB (1) | GB830077A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2172999A (en) * | 1985-03-25 | 1986-10-01 | Protimeter Plc | A humidity measurement or control instrument |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE453970C (en) * | 1925-05-29 | 1927-12-27 | C H Weisbach Komm Ges | Method and device for treating webs in drying machines |
DE949378C (en) * | 1953-10-27 | 1956-09-20 | Otto Volz | Device for displaying the moisture content, especially of moving webs of fabric |
-
0
- DE DENDAT1008501D patent/DE1008501B/de active Pending
-
1954
- 1954-12-23 CH CH329431D patent/CH329431A/en unknown
-
1955
- 1955-01-07 CH CH328122D patent/CH328122A/en unknown
- 1955-01-15 DE DEZ4677A patent/DE1096082B/en active Pending
- 1955-12-21 FR FR1140929D patent/FR1140929A/en not_active Expired
- 1955-12-21 GB GB36682/55A patent/GB830077A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2172999A (en) * | 1985-03-25 | 1986-10-01 | Protimeter Plc | A humidity measurement or control instrument |
Also Published As
Publication number | Publication date |
---|---|
DE1096082B (en) | 1960-12-29 |
DE1008501B (en) | |
CH328122A (en) | 1958-02-28 |
FR1140929A (en) | 1957-08-21 |
CH329431A (en) | 1958-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Kolthoff et al. | Electric potentials at crystal surfaces, and at silver halide surfaces in particular | |
DK139895B (en) | Electrochemical measuring electrode for transcutaneous measurement. | |
IT1084976B (en) | MEASURING APPARATUS WITH ERROR COMPENSATION | |
US2117596A (en) | Glass electrode | |
US3598713A (en) | Potassium ion sensitive electrode | |
GB1281116A (en) | Electrode, half cell and electrode component for the measurement of electromotive force | |
GB830077A (en) | Improvements in or relating to moisture meters | |
GB947857A (en) | Improvements relating to electrical hygrometers | |
US3105214A (en) | Moisture measuring apparatus | |
GB1425204A (en) | Moisture-measuring devices | |
US3929609A (en) | Method and apparatus using solid sensor electrode | |
GB679890A (en) | Improvements in reference electrodes for use in ph-measurement apparatus | |
US2876321A (en) | Humidity responsive resistor | |
US2962897A (en) | Apparatus for measuring the relative humidity of the air | |
US3077446A (en) | Reference electrode for ph meters | |
US3578579A (en) | Electrochemical apparatus | |
JPS5283279A (en) | Electrolyte measuring instrument | |
GB678648A (en) | Improved reference electrode for ph apparatus | |
Caton Jr | Reference electrodes | |
US3671413A (en) | Nitrate ion sensitive electrode | |
US4052286A (en) | Solid sensor electrode | |
US3522732A (en) | Sensing element for hygrometers | |
US3700576A (en) | Ion-activity measuring electrode | |
JPH05502510A (en) | glass electrode | |
JPH01100449A (en) | Electrode film |