NO176374C - Optisk anordning for indikasjon av fuktighet - Google Patents

Optisk anordning for indikasjon av fuktighet

Info

Publication number
NO176374C
NO176374C NO882190A NO882190A NO176374C NO 176374 C NO176374 C NO 176374C NO 882190 A NO882190 A NO 882190A NO 882190 A NO882190 A NO 882190A NO 176374 C NO176374 C NO 176374C
Authority
NO
Norway
Prior art keywords
moisture
optical device
prism
indication
change
Prior art date
Application number
NO882190A
Other languages
English (en)
Other versions
NO882190L (no
NO176374B (no
NO882190D0 (no
Inventor
Esko Alasaarela
Original Assignee
Effem Gmbh
Moistic Oy
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 Effem Gmbh, Moistic Oy filed Critical Effem Gmbh
Publication of NO882190L publication Critical patent/NO882190L/no
Publication of NO882190D0 publication Critical patent/NO882190D0/no
Publication of NO176374B publication Critical patent/NO176374B/no
Publication of NO176374C publication Critical patent/NO176374C/no

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/02—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
    • G01F23/2922—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Thermal Sciences (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Cable Accessories (AREA)
  • Indole Compounds (AREA)
  • Thermistors And Varistors (AREA)
  • Luminescent Compositions (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
NO882190A 1986-09-30 1988-05-19 Optisk anordning for indikasjon av fuktighet NO176374C (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI863947A FI78564C (fi) 1986-09-30 1986-09-30 Fuktighetsindikator.
PCT/FI1987/000033 WO1988002485A1 (en) 1986-09-30 1987-03-13 A moisture indicator

Publications (4)

Publication Number Publication Date
NO882190L NO882190L (no) 1988-05-19
NO882190D0 NO882190D0 (no) 1988-05-19
NO176374B NO176374B (no) 1994-12-12
NO176374C true NO176374C (no) 1995-03-22

Family

ID=8523240

Family Applications (1)

Application Number Title Priority Date Filing Date
NO882190A NO176374C (no) 1986-09-30 1988-05-19 Optisk anordning for indikasjon av fuktighet

Country Status (10)

Country Link
US (1) US4846572A (no)
EP (1) EP0324733B1 (no)
JP (1) JPH0820362B2 (no)
AT (1) ATE68265T1 (no)
DE (1) DE3773681D1 (no)
DK (1) DK168462B1 (no)
FI (1) FI78564C (no)
NO (1) NO176374C (no)
SU (1) SU1718737A3 (no)
WO (1) WO1988002485A1 (no)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6766762B2 (en) * 2001-10-05 2004-07-27 Purdue Research Foundation Indicator device for soil
US20030080304A1 (en) * 2001-10-31 2003-05-01 Flow-Rite Controls, Inc. Apparatus and method for monitoring soil moisture conditions and for maintaining soil moisture conditions
FR2840068A1 (fr) * 2002-05-27 2003-11-28 Vincent Letocart Detecteur de presence d'eau et/ou d'humidite a action mecanique pour travail en milieu explosif
US20110107825A1 (en) * 2009-11-12 2011-05-12 Jenkinson Byron J Anaerobic soil indicator device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943530A (en) * 1956-10-26 1960-07-05 Elastic Stop Nut Corp Optical indicator for liquid level
US3026718A (en) * 1959-12-15 1962-03-27 Matson Randolph Soil moisture indicating gage
US3045477A (en) * 1961-03-02 1962-07-24 Matson Randolph Soil moisture indicating gage
US3345870A (en) * 1963-11-26 1967-10-10 Yoshinaga Prince Kabushiki Kai Fuel level indicator
US3364733A (en) * 1964-01-16 1968-01-23 Comstock & Wescott Liquid content indicating container
GB1158573A (en) * 1966-02-16 1969-07-16 Lambert S Lancaster Ltd Improvements in or relating to Moisture Determining Devices
US3824844A (en) * 1973-05-11 1974-07-23 Water Rite Inc Soil moisture monitor
FR2301013A1 (fr) * 1975-02-12 1976-09-10 Anquetin Jacques Dispositif avertisseur d'assechement
DE2726082A1 (de) * 1977-06-10 1978-12-21 Bosch Siemens Hausgeraete Optische fluessigkeitsstandanzeige, insbesondere fuer haushaltgeraete, wie geschirrspuel- und waschmaschinen, mit einem lichtleitenden stab
US4130012A (en) * 1977-11-25 1978-12-19 Design Loft Creations, Inc. Soil moisture indicator
GB2152669A (en) * 1984-01-10 1985-08-07 Thorn Emi Domestic Appliances A liquid level indicator

Also Published As

Publication number Publication date
JPS6390742A (ja) 1988-04-21
FI78564B (fi) 1989-04-28
WO1988002485A1 (en) 1988-04-07
US4846572A (en) 1989-07-11
DK290888A (da) 1988-05-27
NO882190L (no) 1988-05-19
NO176374B (no) 1994-12-12
FI863947A0 (fi) 1986-09-30
FI78564C (fi) 1989-08-10
DK290888D0 (da) 1988-05-27
SU1718737A3 (ru) 1992-03-07
DE3773681D1 (de) 1991-11-14
DK168462B1 (da) 1994-03-28
NO882190D0 (no) 1988-05-19
JPH0820362B2 (ja) 1996-03-04
FI863947A (fi) 1988-03-31
EP0324733A1 (en) 1989-07-26
EP0324733B1 (en) 1991-10-09
ATE68265T1 (de) 1991-10-15

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Legal Events

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