FR2447877A1 - Monitoring the level of cryogenic liq. in tanks or pipes - via heated temp. sensor which exhibits pronounced drop in temp. when in contact with liq. - Google Patents

Monitoring the level of cryogenic liq. in tanks or pipes - via heated temp. sensor which exhibits pronounced drop in temp. when in contact with liq.

Info

Publication number
FR2447877A1
FR2447877A1 FR8002033A FR8002033A FR2447877A1 FR 2447877 A1 FR2447877 A1 FR 2447877A1 FR 8002033 A FR8002033 A FR 8002033A FR 8002033 A FR8002033 A FR 8002033A FR 2447877 A1 FR2447877 A1 FR 2447877A1
Authority
FR
France
Prior art keywords
liq
temp
sensor
level
cryogenic
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.)
Pending
Application number
FR8002033A
Other languages
French (fr)
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim GmbH
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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of FR2447877A1 publication Critical patent/FR2447877A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The appts. includes a temp. sensor which actuates a switch when the surface of the liq. reaches the sensor. The pref. appts. consists of a thermally insulated tube located in the upper part of a tank or pipe; and inside the tube is a heater cartridge and the sensor. The tube is pref. made of ceramic, and has radial holes via which the liq. can reach the sensor. The heater cartridge maintains the sensor at a prescribed temp. until the liq. rises and exerts a quenching action of the bottom end of the sensor. This sharp drop in temp. is used esp. to switch off a pump feeding the liq. into the tank. When the level of the liq. drops, the temp. of the heated sensor rises, and the temp. rise is used to switch on the pump.
FR8002033A 1979-02-01 1980-01-30 Monitoring the level of cryogenic liq. in tanks or pipes - via heated temp. sensor which exhibits pronounced drop in temp. when in contact with liq. Pending FR2447877A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792903731 DE2903731C2 (en) 1979-02-01 1979-02-01 Device for monitoring a cryogenic liquid medium

Publications (1)

Publication Number Publication Date
FR2447877A1 true FR2447877A1 (en) 1980-08-29

Family

ID=6061856

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8002033A Pending FR2447877A1 (en) 1979-02-01 1980-01-30 Monitoring the level of cryogenic liq. in tanks or pipes - via heated temp. sensor which exhibits pronounced drop in temp. when in contact with liq.

Country Status (3)

Country Link
DE (1) DE2903731C2 (en)
FI (1) FI70642C (en)
FR (1) FR2447877A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612983A1 (en) * 1993-02-25 1994-08-31 Hughes Aircraft Company Method and apparatus for detecting the position of fluid-fluid interfaces
CN114929014A (en) * 2019-08-29 2022-08-19 基伊埃Tds有限公司 Method and device for transporting high-quality fresh milk under transport and environmental-critical conditions

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485100A (en) * 1967-01-26 1969-12-23 Danfoss As Liquid-level measuring equipment
FR2214881A1 (en) * 1973-01-19 1974-08-19 Abtec Ltd

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485100A (en) * 1967-01-26 1969-12-23 Danfoss As Liquid-level measuring equipment
FR2214881A1 (en) * 1973-01-19 1974-08-19 Abtec Ltd

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612983A1 (en) * 1993-02-25 1994-08-31 Hughes Aircraft Company Method and apparatus for detecting the position of fluid-fluid interfaces
US5394749A (en) * 1993-02-25 1995-03-07 Hughes Aircraft Company Method and apparatus for detecting the position of fluid-fluid interfaces
CN114929014A (en) * 2019-08-29 2022-08-19 基伊埃Tds有限公司 Method and device for transporting high-quality fresh milk under transport and environmental-critical conditions
CN114929014B (en) * 2019-08-29 2023-12-12 基伊埃Tds有限公司 Transportation method, transportation device and system for high-quality fresh milk

Also Published As

Publication number Publication date
FI70642C (en) 1986-09-24
DE2903731A1 (en) 1980-08-14
DE2903731C2 (en) 1983-03-10
FI800305A (en) 1980-08-02
FI70642B (en) 1986-06-06

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