ZA847645B - Thermal system for measuring liquid levels - Google Patents
Thermal system for measuring liquid levelsInfo
- Publication number
- ZA847645B ZA847645B ZA847645A ZA847645A ZA847645B ZA 847645 B ZA847645 B ZA 847645B ZA 847645 A ZA847645 A ZA 847645A ZA 847645 A ZA847645 A ZA 847645A ZA 847645 B ZA847645 B ZA 847645B
- Authority
- ZA
- South Africa
- Prior art keywords
- liquid levels
- thermal system
- measuring liquid
- measuring
- levels
- Prior art date
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
-
- 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
- G01F23/24—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 variations of resistance of resistors due to contact with conductor fluid
- G01F23/246—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 variations of resistance of resistors due to contact with conductor fluid thermal devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7306—Electrical characteristic sensing
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8315562A FR2552876B1 (fr) | 1983-09-29 | 1983-09-29 | Systeme thermique de mesure de niveau de liquide |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA847645B true ZA847645B (en) | 1985-05-29 |
Family
ID=9292677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA847645A ZA847645B (en) | 1983-09-29 | 1984-09-28 | Thermal system for measuring liquid levels |
Country Status (10)
Country | Link |
---|---|
US (1) | US4590797A (xx) |
EP (1) | EP0144253B1 (xx) |
JP (1) | JPS6093315A (xx) |
KR (1) | KR850002303A (xx) |
CA (1) | CA1233667A (xx) |
DE (1) | DE3472299D1 (xx) |
ES (1) | ES8900024A1 (xx) |
FR (1) | FR2552876B1 (xx) |
YU (1) | YU45969B (xx) |
ZA (1) | ZA847645B (xx) |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5117216A (en) * | 1986-04-23 | 1992-05-26 | Fluid Components, Inc. | Distributed RTD |
US5167153A (en) * | 1986-04-23 | 1992-12-01 | Fluid Components, Inc. | Method of measuring physical phenomena using a distributed RTD |
US4720997A (en) * | 1986-12-01 | 1988-01-26 | Doak Roni K | Material level monitor |
US4785665A (en) * | 1987-01-16 | 1988-11-22 | Mcculloch Reg W | Measuring instrument that senses heat transfer along a probe |
EP0340309A4 (en) * | 1987-10-02 | 1992-01-08 | Matsushita Electric Industrial Co., Ltd. | Heat-sensitive fuel quantity detector |
US5134772A (en) * | 1988-05-02 | 1992-08-04 | Fluid Components, Inc. | Method of making a U-shaped heated extended resistance temperature sensor |
US5201223A (en) * | 1988-05-02 | 1993-04-13 | Fluid Components, Inc. | Method of sensing fluid flow and level employing a heated extended resistance temperature sensor |
US4994780A (en) * | 1988-05-02 | 1991-02-19 | Fluid Components, Inc. | Heated extended resistance temperature sensor, apparatus for sensing and method of making same |
US5152049A (en) * | 1988-05-02 | 1992-10-06 | Fluid Components, Inc. | Method of making a heated extended resistance temperature sensor |
US5031126A (en) * | 1988-06-30 | 1991-07-09 | Delta M Corporation | Constant power thermal sensor |
US4929930A (en) * | 1988-10-24 | 1990-05-29 | Process Technology Inc. | Liquid level controller utilizing the rate of change of a thermocouple |
JPH02234032A (ja) * | 1989-03-08 | 1990-09-17 | Snow Brand Milk Prod Co Ltd | 流体の状態を知るための計測用センサー及びそのセンサーを用いる測定方法 |
US5056363A (en) * | 1990-03-08 | 1991-10-15 | Industrial Engineering And Equipment Company, Inc. | Integral temperature and liquid level sensor and control |
US5178009A (en) * | 1990-03-08 | 1993-01-12 | Industrial Engineering And Equipment Company | Integral temperature and liquid level sensor and control |
US5438866A (en) * | 1990-06-25 | 1995-08-08 | Fluid Components, Inc. | Method of making average mass flow velocity measurements employing a heated extended resistance temperature sensor |
US5137370A (en) * | 1991-03-25 | 1992-08-11 | Delta M Corporation | Thermoresistive sensor system |
US5099688A (en) * | 1991-03-25 | 1992-03-31 | W. R. Grace & Co.-Conn | Thermographic method for determining the volume of concrete in a mixing container |
FR2740537B1 (fr) * | 1995-10-31 | 1998-01-16 | Seb Sa | Generateur de vapeur a approvisionnement automatique et procede de mesure du niveau de liquide dans un tel generateur |
US5821864A (en) * | 1996-04-29 | 1998-10-13 | Enviro Products, Inc. | Wireless interface probe apparatus and method |
US6250153B1 (en) * | 1998-07-06 | 2001-06-26 | Sensor Measurement Technology | Continuous, non-metallic, media sensors for corrosive environments |
US6202486B1 (en) * | 1998-10-01 | 2001-03-20 | Imaging & Sensing Technology Corporation | Analog liquid level sensor |
US6948364B2 (en) | 1999-08-03 | 2005-09-27 | Charles Snelling | Apparatus for detecting the internal liquid level in a vessel |
US6615658B2 (en) | 1999-08-03 | 2003-09-09 | Charles Darwin Snelling | Method and apparatus for detecting the internal liquid level in a vessel |
US6568263B1 (en) | 1999-08-03 | 2003-05-27 | Charles Darwin Snelling | Liquid level detector and system |
US6487904B1 (en) * | 2000-11-09 | 2002-12-03 | Rosemont Aerospace Inc. | Method and sensor for mass flow measurement using probe heat conduction |
US6546796B2 (en) * | 2001-03-15 | 2003-04-15 | Therm-O-Disc, Incorporated | Liquid level sensor |
US6966222B2 (en) * | 2003-12-08 | 2005-11-22 | Hewlett-Packard Development Company, L.P. | Methods and apparatus for media level measurement |
JP2005201068A (ja) * | 2004-01-13 | 2005-07-28 | Denso Corp | 燃料判別装置 |
EP1975308A1 (en) * | 2007-03-30 | 2008-10-01 | Koninklijke Philips Electronics N.V. | Method for determining the liquid level in a boiler |
KR101055863B1 (ko) * | 2008-10-02 | 2011-08-09 | 포항공과대학교 산학협력단 | 액체 혼합물 시료의 레벨 및 성분비 측정 센서 |
US8562091B2 (en) * | 2010-03-09 | 2013-10-22 | Xerox Corporation | Apparatus and method for detecting ink in a reservoir using an overdriven thermistor and an electrical conductor extending from the thermistor |
US9121743B2 (en) * | 2012-05-31 | 2015-09-01 | Rosemount Inc. | Process variable transmitter system with analog communication |
US20140072086A1 (en) * | 2012-09-11 | 2014-03-13 | Ge-Hitachi Nuclear Energy Americas Llc | Method and system for measuring a spent fuel pool temperature and liquid level without external electrical power |
FR3020873B1 (fr) * | 2014-05-12 | 2017-10-27 | Cryopal | Capteur de niveau de liquide cryogenique et dispositif de stockage comportant un tel capteur |
CN109070594B (zh) * | 2016-04-29 | 2020-06-16 | 惠普发展公司,有限责任合伙企业 | 使用计数器检测流体水平的打印盒和感测管芯 |
US10837818B2 (en) * | 2016-04-29 | 2020-11-17 | Hewlett-Packard Development Company, L.P. | Detecting fluid levels using a voltage comparator |
JP6830265B2 (ja) * | 2016-12-27 | 2021-02-17 | 株式会社フジキン | 液面計、それを備えた気化器、及び液面検知方法 |
DE102018104512B3 (de) * | 2018-02-28 | 2019-06-19 | Joachim Fürst | Vorrichtung zum automatisierten Sammeln von Proben von Hochwasser-Ereignissen und Regenentlastungen |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3644885A (en) * | 1970-06-22 | 1972-02-22 | Ford Motor Co | Low liquid level indicator |
DE2308823C3 (de) * | 1973-02-22 | 1978-11-30 | Kraftwerk Union Ag, 4330 Muelheim | Niveaustandsmeßeinrichtung |
US3955416A (en) * | 1975-01-30 | 1976-05-11 | International Telephone And Telegraph Corporation | Thermal liquid level detector |
US3956760A (en) * | 1975-03-12 | 1976-05-11 | Liquidometer Corporation | Liquid level gauge |
US4125021A (en) * | 1976-06-01 | 1978-11-14 | Doryokuro Kakunenryo Kaihatsu Jigyodan | Apparatus for detecting conductive liquid level |
FR2367276A1 (fr) * | 1976-10-06 | 1978-05-05 | Jaeger | Dispositif permettant le controle du niveau de liquide contenu dans un reservoir |
US4165509A (en) * | 1977-08-24 | 1979-08-21 | Eaton Corporation | Dual liquid level monitor |
JPS5823570B2 (ja) * | 1978-11-30 | 1983-05-16 | 国産電機株式会社 | 液面検出装置 |
JPS5764115A (en) * | 1980-10-07 | 1982-04-19 | Japan Atom Energy Res Inst | Method and apparatus detecting liquid level |
JPS57158522A (en) * | 1981-03-27 | 1982-09-30 | Hitachi Ltd | Detecting apparatus of water level of pressure vessel of nuclear reactor |
-
1983
- 1983-09-29 FR FR8315562A patent/FR2552876B1/fr not_active Expired
-
1984
- 1984-09-24 US US06/653,454 patent/US4590797A/en not_active Expired - Fee Related
- 1984-09-25 DE DE8484401907T patent/DE3472299D1/de not_active Expired
- 1984-09-25 YU YU165484A patent/YU45969B/sh unknown
- 1984-09-25 EP EP84401907A patent/EP0144253B1/fr not_active Expired
- 1984-09-26 CA CA000464077A patent/CA1233667A/en not_active Expired
- 1984-09-27 JP JP59202863A patent/JPS6093315A/ja active Granted
- 1984-09-28 ES ES536383A patent/ES8900024A1/es not_active Expired
- 1984-09-28 ZA ZA847645A patent/ZA847645B/xx unknown
- 1984-09-29 KR KR1019840006065A patent/KR850002303A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
US4590797A (en) | 1986-05-27 |
JPH043813B2 (xx) | 1992-01-24 |
CA1233667A (en) | 1988-03-08 |
JPS6093315A (ja) | 1985-05-25 |
ES8900024A1 (es) | 1988-10-16 |
EP0144253B1 (fr) | 1988-06-22 |
YU45969B (sh) | 1992-12-21 |
FR2552876A1 (fr) | 1985-04-05 |
KR850002303A (ko) | 1985-05-10 |
EP0144253A1 (fr) | 1985-06-12 |
YU165484A (en) | 1987-10-31 |
DE3472299D1 (en) | 1988-07-28 |
ES536383A0 (es) | 1988-10-16 |
FR2552876B1 (fr) | 1985-10-25 |
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