JPS50102397A - - Google Patents

Info

Publication number
JPS50102397A
JPS50102397A JP50001117A JP111775A JPS50102397A JP S50102397 A JPS50102397 A JP S50102397A JP 50001117 A JP50001117 A JP 50001117A JP 111775 A JP111775 A JP 111775A JP S50102397 A JPS50102397 A JP S50102397A
Authority
JP
Japan
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.)
Pending
Application number
JP50001117A
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 filed Critical
Publication of JPS50102397A publication Critical patent/JPS50102397A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials
    • G01N33/246—Earth materials for water content
    • 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
    • G01R17/10—AC or DC measuring bridges
    • G01R17/16—AC or DC measuring bridges with discharge tubes or semiconductor devices in one or more arms of the bridge, e.g. voltmeter using a difference amplifier
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • 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

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Biochemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Remote Sensing (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Power Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
JP50001117A 1974-01-02 1974-12-27 Pending JPS50102397A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15674 1974-01-02

Publications (1)

Publication Number Publication Date
JPS50102397A true JPS50102397A (ja) 1975-08-13

Family

ID=9699390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50001117A Pending JPS50102397A (ja) 1974-01-02 1974-12-27

Country Status (5)

Country Link
US (1) US3979667A (ja)
JP (1) JPS50102397A (ja)
DE (1) DE2461393A1 (ja)
FR (1) FR2256409B3 (ja)
NL (1) NL7500033A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5227287U (ja) * 1975-08-18 1977-02-25
JPS5380486U (ja) * 1976-12-06 1978-07-04

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070615A (en) * 1976-05-12 1978-01-24 Tektronix, Inc. Compensation indicator for attenuation probe
US4122389A (en) * 1977-05-23 1978-10-24 Tandy Corporation Moisture sensor
US4268824A (en) * 1977-12-09 1981-05-19 Phillips Reed E Plant soil moisture level-signaling device for household and commercial use
DE2855809C2 (de) * 1978-12-22 1980-06-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen Einrichtung zur automatischen Überwachung des Ladezustandes einer netzunabhängigen Stromversorgung und der Luftfeuchte im Antwortgerät einer Anlage zur Standortbestimmung von Verkehrseinrichtungen
AU5728380A (en) * 1979-04-10 1980-10-16 Johnston, Hal Pty. Ltd. Hood for rotary-arm dishwasher
DE3110671A1 (de) * 1981-03-19 1983-03-24 Johnson Service Co., Milwaukee, Wis. Analoge ausgangssignalnzeige
FR2517061A1 (fr) * 1981-11-20 1983-05-27 Mere Malleray Et Cie Indicateur electronique d'arrosage
ES1014088Y (es) * 1990-05-11 1991-07-16 Lopez Rayado Luis Indicador de riego domestico.
US5450012A (en) * 1993-09-15 1995-09-12 Hydro-Quebec Soil electrode assembly for protecting and supporting an electrode member for measuring the resistivity of a volume of the soil
US6700395B1 (en) 2002-04-26 2004-03-02 Betty J. Perry Soil moisture indicator device
DE102005058436A1 (de) * 2005-12-07 2007-06-14 Werner Krachtus Vorrichtung zur Messung und Anzeige der Feuchtigkeit in einem Erdreich
CN102426178A (zh) * 2011-10-08 2012-04-25 黄宇嵩 育秧棚用电桥式湿度指示器
US11243182B2 (en) * 2019-02-05 2022-02-08 AGI Suretrack LLC Moisture soil probe system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3452347A (en) * 1966-11-03 1969-06-24 Eastman Kodak Co Luminous diode battery condition indicator for camera
US3688309A (en) * 1970-09-09 1972-08-29 Herman W Volberg Device for detecting and displaying the response of a tissue to stimuli
US3882383A (en) * 1973-06-07 1975-05-06 Charles Matlin Soil moisture sensing system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5227287U (ja) * 1975-08-18 1977-02-25
JPS5380486U (ja) * 1976-12-06 1978-07-04

Also Published As

Publication number Publication date
US3979667A (en) 1976-09-07
FR2256409B3 (ja) 1977-09-23
FR2256409A1 (ja) 1975-07-25
NL7500033A (nl) 1975-07-04
DE2461393A1 (de) 1975-11-06

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