GB1415465A - Humidity indicator - Google Patents
Humidity indicatorInfo
- Publication number
- GB1415465A GB1415465A GB1403073A GB1403073A GB1415465A GB 1415465 A GB1415465 A GB 1415465A GB 1403073 A GB1403073 A GB 1403073A GB 1403073 A GB1403073 A GB 1403073A GB 1415465 A GB1415465 A GB 1415465A
- Authority
- GB
- United Kingdom
- Prior art keywords
- humidity
- humidity indicator
- alarm device
- electrodes
- oscillator
- 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
- G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
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)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
1415465 Measuring humidity electrically DIXI SA 23 March 1973 [14 April 1972] 14030/73 Heading G1N A humidity indicator comprises a pair of electrodes 8, 9, a relaxation oscillator 16, Fig. 1, and an alarm device 7 arranged in a portable case 14, 15. When the humidity of material, e.g. earth, between the electrodes falls below a predetermined value, the oscillator provides pulses to energize the alarm device 7.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH558772A CH560389A5 (en) | 1972-04-14 | 1972-04-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1415465A true GB1415465A (en) | 1975-11-26 |
Family
ID=4296072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1403073A Expired GB1415465A (en) | 1972-04-14 | 1973-03-23 | Humidity indicator |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS4918080A (en) |
CH (1) | CH560389A5 (en) |
DE (1) | DE2314902A1 (en) |
FR (1) | FR2180306A5 (en) |
GB (1) | GB1415465A (en) |
NL (1) | NL7305325A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2221036A (en) * | 1988-03-22 | 1990-01-24 | David John Cross | Soil moisture alarm |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5211096A (en) * | 1975-07-14 | 1977-01-27 | Enu Deibou Bujiyon | Signal generator in audio frequency for sighting characteristics of materials |
US4069716A (en) * | 1976-02-05 | 1978-01-24 | Lmc Data, Inc. | Apparatus and method for use in determining conditions related to a plant |
FR2517061A1 (en) * | 1981-11-20 | 1983-05-27 | Mere Malleray Et Cie | Electronic hygrometer for soil measurements - uses buried electrodes and produces alarm signal when inter-electrode resistance reaches preset value |
DE3639695A1 (en) * | 1986-11-20 | 1988-06-01 | Guy Heusquin | DEVICE FOR DISPLAYING VALUES OF INTEREST IN A HYDRO CULTURE |
JPS6387555U (en) * | 1986-11-26 | 1988-06-07 | ||
JPS63118557U (en) * | 1987-01-27 | 1988-08-01 | ||
JPS63250555A (en) * | 1987-04-07 | 1988-10-18 | Seijiro Isoi | Water shortage detector for pot |
JPH0617574Y2 (en) * | 1987-11-30 | 1994-05-11 | ぺんてる株式会社 | Writing instrument cartridge |
-
1972
- 1972-04-14 CH CH558772A patent/CH560389A5/xx not_active IP Right Cessation
-
1973
- 1973-03-23 GB GB1403073A patent/GB1415465A/en not_active Expired
- 1973-03-26 DE DE19732314902 patent/DE2314902A1/en active Pending
- 1973-04-02 FR FR7311743A patent/FR2180306A5/fr not_active Expired
- 1973-04-13 JP JP4206973A patent/JPS4918080A/ja active Pending
- 1973-04-16 NL NL7305325A patent/NL7305325A/xx not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2221036A (en) * | 1988-03-22 | 1990-01-24 | David John Cross | Soil moisture alarm |
Also Published As
Publication number | Publication date |
---|---|
NL7305325A (en) | 1973-10-16 |
DE2314902A1 (en) | 1973-10-25 |
CH560389A5 (en) | 1975-03-27 |
JPS4918080A (en) | 1974-02-18 |
FR2180306A5 (en) | 1973-11-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |