ES450862A1 - Liquid level sensor - Google Patents

Liquid level sensor

Info

Publication number
ES450862A1
ES450862A1 ES450862A ES450862A ES450862A1 ES 450862 A1 ES450862 A1 ES 450862A1 ES 450862 A ES450862 A ES 450862A ES 450862 A ES450862 A ES 450862A ES 450862 A1 ES450862 A1 ES 450862A1
Authority
ES
Spain
Prior art keywords
fiber
interface
level
fluids
bare
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
ES450862A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana 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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES450862A1 publication Critical patent/ES450862A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01F23/2925—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms using electrical detecting means

Abstract

A method of detecting the level of a liquid and, specifically, of an interface between two fluids of different refractive indices, the first of whose fluids is a liquid in which light propagates from a light source to a detector through a optical fiber a part of which, at least, is bare and the refractive index of this part is intermediate between those of the two fluids, and where the level of the interface is detected by the change in the level of the received light by the detector caused by relative motion between the fiber and the interface, to cause a transition between the state in which at least some of the bare region of the fiber is in contact with the refractive index fluid higher and the state in which no part of the bare region of the fiber is in contact with it. (Machine-translation by Google Translate, not legally binding)
ES450862A 1975-08-21 1976-08-20 Liquid level sensor Expired ES450862A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3477975A GB1463910A (en) 1975-08-21 1975-08-21 Liquid level sensor

Publications (1)

Publication Number Publication Date
ES450862A1 true ES450862A1 (en) 1977-08-16

Family

ID=10369848

Family Applications (1)

Application Number Title Priority Date Filing Date
ES450862A Expired ES450862A1 (en) 1975-08-21 1976-08-20 Liquid level sensor

Country Status (2)

Country Link
ES (1) ES450862A1 (en)
GB (1) GB1463910A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3246340A1 (en) * 1982-12-15 1984-06-20 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt DEVICE FOR MEASURING AND MONITORING THE LEVEL OF A LIQUID CONTAINER
JPS61198040A (en) * 1984-12-08 1986-09-02 テストターム・メステヒニーク・ゲー・エム・ベー・ハー・ウント・コンパニー Optical dew point sensor
US4711126A (en) * 1985-03-13 1987-12-08 501 Nederlandse Centrale Organisatie Voor Toegepast-Enschappelijk Onderzoek Sensor for the measurement of the refractive index of a fluid and/or phase boundary between two fluids by means of visible or invisible light
DE10163128A1 (en) * 2001-12-20 2003-07-10 Schneegans Gmbh dipstick
ITPD20100227A1 (en) * 2010-07-19 2012-01-20 Optoelettronica Italia S R L CONTAINER FOR LIQUIDS, AND IN PARTICULAR THE TYPE FOR EXTRA-REPAIR BLOOD CIRCULATION, REFINED
CN112325983B (en) * 2020-10-22 2022-07-19 安徽皖控自动化仪表有限公司 High-resolution optical fiber liquid level sensor for oil level measurement

Also Published As

Publication number Publication date
GB1463910A (en) 1977-02-09

Similar Documents

Publication Publication Date Title
DE3173261D1 (en) Device with a double optical probe for determining the refractive index led back to a reference temperature in a fluid
ATE67853T1 (en) BIOLOGICAL DETECTION DEVICE.
ES450848A1 (en) Method and apparatus for immiscible liquids measurement
KR840002529A (en) Micro Curved Fiber Tapped Delay Line
ES8202089A1 (en) Device and method for detecting leaks from pipelines.
EP0194732A3 (en) Sensor for the measurement of the refractive index of a fluid and/or phase boundary between two fluids by means of visible or invisible light
JPS57106838A (en) Optical fiber for sensor
ES450862A1 (en) Liquid level sensor
FR2351424A1 (en) GRADUATED REFRACTION INDEX OPTICAL EQUALIZER FOR SIGNAL TRANSMISSION ON MULTIMODE OPTICAL GUIDES
KR890008559A (en) Light Transmissive Liquid Detection Sensor
SE8301800L (en) DEVICE FOR DETERMINING A DENSITY, DENSITY NUMBER, CONCENTRATION, ETC
ATE13353T1 (en) REFRACTOMETERS.
SE9300231D0 (en) PREPARATION METHOD FOR RELEASE INDEX DETECTION IN SCIENCE
JPS55129730A (en) Measurement unit for fluid refractive index
JPS57108605A (en) Displacement meter
GB2001752A (en) Optical detector device
JPS55134322A (en) Liquid level detector
SU1624383A1 (en) Device for measuring mechanical quantities
SU769320A1 (en) Interference method of measuring linear dimensions of optically transparent object with curvilinear surfaces
JPS5595887A (en) Detector
JPS5690227A (en) Optical fiber temperature detector
JPS57196109A (en) Optical detector for physical amount
JPS554573A (en) Optical measuring method and optical measuring device
SU1696884A1 (en) Liquid level indicator
JPS568513A (en) Liquid amount detector

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612