GB1415465A - Humidity indicator - Google Patents

Humidity indicator

Info

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
Application number
GB1403073A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dixi SA
Original Assignee
Dixi SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dixi SA filed Critical Dixi SA
Publication of GB1415465A publication Critical patent/GB1415465A/en
Expired legal-status Critical Current

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.
GB1403073A 1972-04-14 1973-03-23 Humidity indicator Expired GB1415465A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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
FR2180306A5 (en) 1973-11-23
DE2314902A1 (en) 1973-10-25
CH560389A5 (en) 1975-03-27
JPS4918080A (en) 1974-02-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee