GB2022844A - Liquid Level and Temperature Probe - Google Patents

Liquid Level and Temperature Probe

Info

Publication number
GB2022844A
GB2022844A GB7919827A GB7919827A GB2022844A GB 2022844 A GB2022844 A GB 2022844A GB 7919827 A GB7919827 A GB 7919827A GB 7919827 A GB7919827 A GB 7919827A GB 2022844 A GB2022844 A GB 2022844A
Authority
GB
United Kingdom
Prior art keywords
thermistor
leads
liquid level
section
temperature probe
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.)
Granted
Application number
GB7919827A
Other versions
GB2022844B (en
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of GB2022844A publication Critical patent/GB2022844A/en
Application granted granted Critical
Publication of GB2022844B publication Critical patent/GB2022844B/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
    • G01F23/24—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
    • G01F23/247—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 for discrete levels
    • G01F23/248—Constructional details; Mounting of probes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

A liquid level probe has a housing 1 with a lower section 2 containing a first thermistor 4. Section 2 has a cap 16 which holds a second thermistor 11 in place via a spring 15. The cap is held on section 2 by a spring-ring 18. Two leads 5 and 6 extend from thermistor 4 to the upper section 7 of housing 1 and are attached to two members 9 and 8, the member 8 being earthed. Thermistor 11 has two leads 12 and 19 which extend to a third member 10 and to member 8 respectively. With the probe in a liquid, and current passing through leads 5 and 6, thermistor 4 acts as a level sensor by detecting changes in resistance. A current is passed through leads 12 and 19 to thermistor 11, which monitors the temperature by a change in resistance. <IMAGE>
GB7919827A 1978-06-09 1979-06-07 Liquid level and temperature probe Expired GB2022844B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19787817351 DE7817351U1 (en) 1978-06-09 1978-06-09 PROBE FOR SIGNALING LIQUID LEVEL

Publications (2)

Publication Number Publication Date
GB2022844A true GB2022844A (en) 1979-12-19
GB2022844B GB2022844B (en) 1982-11-24

Family

ID=6692247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7919827A Expired GB2022844B (en) 1978-06-09 1979-06-07 Liquid level and temperature probe

Country Status (3)

Country Link
DE (1) DE7817351U1 (en)
FR (1) FR2432166A1 (en)
GB (1) GB2022844B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440717A (en) * 1981-09-01 1984-04-03 Combustion Engineering, Inc. Heated junction thermocouple level measurement apparatus
EP0149416A2 (en) * 1983-12-20 1985-07-24 Werner Dr.Med. Steinschulte Thermometer to measure the temperature in media of poor convection
FR2559797A1 (en) * 1984-02-17 1985-08-23 Esswein Sa Device for controlling the level and temperature of water in a washing machine
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
EP1037028A1 (en) * 1999-03-09 2000-09-20 Mannesmann VDO Aktiengesellschaft Sensor for combined measurement of temperature and level
EP1180667A2 (en) * 2000-08-17 2002-02-20 Siemens Aktiengesellschaft Sensor for the determination of fluid level and temperature
CN102878708A (en) * 2012-08-29 2013-01-16 冯先文 Water temperature and water level measuring device for solar water heater
CN106932112A (en) * 2017-02-08 2017-07-07 中国航发沈阳发动机研究所 One kind is without cooling down high-temperature thermocouple preparation method and without cooling down high-temperature thermocouple
US10408660B2 (en) 2016-08-11 2019-09-10 Orscheln Products L.L.C. Electronic fluid level indicator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2901877B1 (en) * 2006-06-02 2016-04-29 Sc2N Sa TEMPERATURE SENSOR AND THE LEVEL OF A LIQUID

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440717A (en) * 1981-09-01 1984-04-03 Combustion Engineering, Inc. Heated junction thermocouple level measurement apparatus
EP0149416A2 (en) * 1983-12-20 1985-07-24 Werner Dr.Med. Steinschulte Thermometer to measure the temperature in media of poor convection
EP0149416A3 (en) * 1983-12-20 1987-01-21 Werner Dr.Med. Steinschulte Thermometer to measure the temperature in media of poor convection
FR2559797A1 (en) * 1984-02-17 1985-08-23 Esswein Sa Device for controlling the level and temperature of water in a washing machine
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
EP1037028A1 (en) * 1999-03-09 2000-09-20 Mannesmann VDO Aktiengesellschaft Sensor for combined measurement of temperature and level
EP1180667A2 (en) * 2000-08-17 2002-02-20 Siemens Aktiengesellschaft Sensor for the determination of fluid level and temperature
EP1180667A3 (en) * 2000-08-17 2002-08-21 Siemens Aktiengesellschaft Sensor for the determination of fluid level and temperature
US6543283B2 (en) 2000-08-17 2003-04-08 Mannesmann Vdo Ag Sensor for determining the level and temperature of a liquid
CN102878708A (en) * 2012-08-29 2013-01-16 冯先文 Water temperature and water level measuring device for solar water heater
CN102878708B (en) * 2012-08-29 2014-10-15 冯先文 Water temperature and water level measuring device for solar water heater
US10408660B2 (en) 2016-08-11 2019-09-10 Orscheln Products L.L.C. Electronic fluid level indicator
CN106932112A (en) * 2017-02-08 2017-07-07 中国航发沈阳发动机研究所 One kind is without cooling down high-temperature thermocouple preparation method and without cooling down high-temperature thermocouple

Also Published As

Publication number Publication date
FR2432166A1 (en) 1980-02-22
FR2432166B3 (en) 1982-04-23
GB2022844B (en) 1982-11-24
DE7817351U1 (en) 1978-09-21

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Legal Events

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