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GB2218214B - Admittance-responsive instrument system - Google Patents

Admittance-responsive instrument system

Info

Publication number
GB2218214B
GB2218214B GB8910905A GB8910905A GB2218214B GB 2218214 B GB2218214 B GB 2218214B GB 8910905 A GB8910905 A GB 8910905A GB 8910905 A GB8910905 A GB 8910905A GB 2218214 B GB2218214 B GB 2218214B
Authority
GB
United Kingdom
Prior art keywords
admittance
instrument system
responsive instrument
responsive
instrument
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 - Fee Related
Application number
GB8910905A
Other versions
GB8910905D0 (en
GB2218214A (en
Inventor
Frederick L Maltby
Richard G Hall
Jonathan L Kramer
Howard S Hoopes
Steven R Petersen
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.)
Drexelbrook Controls Inc
Original Assignee
Drexelbrook Controls Inc
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
Priority claimed from US06/791,319 external-priority patent/US4723122A/en
Application filed by Drexelbrook Controls Inc filed Critical Drexelbrook Controls Inc
Publication of GB8910905D0 publication Critical patent/GB8910905D0/en
Publication of GB2218214A publication Critical patent/GB2218214A/en
Application granted granted Critical
Publication of GB2218214B publication Critical patent/GB2218214B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01F23/26—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/261—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
GB8910905A 1985-10-25 1989-05-12 Admittance-responsive instrument system Expired - Fee Related GB2218214B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/791,319 US4723122A (en) 1985-10-25 1985-10-25 Remotely calibratable instrument system
GB8625404A GB2184241B (en) 1985-10-25 1986-10-23 Remotely calibratable instrument system

Publications (3)

Publication Number Publication Date
GB8910905D0 GB8910905D0 (en) 1989-06-28
GB2218214A GB2218214A (en) 1989-11-08
GB2218214B true GB2218214B (en) 1990-07-04

Family

ID=26291448

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8910905A Expired - Fee Related GB2218214B (en) 1985-10-25 1989-05-12 Admittance-responsive instrument system
GB8910904A Expired - Fee Related GB2218213B (en) 1985-10-25 1989-05-12 Remotely calabratable instrument system and method of operation thereof

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB8910904A Expired - Fee Related GB2218213B (en) 1985-10-25 1989-05-12 Remotely calabratable instrument system and method of operation thereof

Country Status (1)

Country Link
GB (2) GB2218214B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4024402C1 (en) * 1990-08-01 1991-10-31 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
US5710552A (en) * 1994-09-30 1998-01-20 Rosemount Inc. Barrier device
DE59605246D1 (en) * 1996-02-16 2000-06-21 Heidenhain Gmbh Dr Johannes Device and method for switching between different operating modes of a sensor
WO1999004226A1 (en) * 1997-07-14 1999-01-28 Matsushita Electric Industrial Co., Ltd. Sensor provided with adjusting function
DE19825159A1 (en) * 1998-06-05 1999-12-09 Bosch Gmbh Robert Electronic switch
EP1098174B1 (en) * 1999-11-05 2007-06-13 Micronas GmbH Programmable sensor
CN105606179A (en) * 2015-12-17 2016-05-25 上海科勒电子科技有限公司 Water tank water level detection method and system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1524853A (en) * 1974-08-31 1978-09-13 Hauni Werke Koerber & Co Kg Tobacco density testing method and apparatus
EP0101580A1 (en) * 1982-08-25 1984-02-29 Berwind Corporation Capacitance-type material level indicator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1524853A (en) * 1974-08-31 1978-09-13 Hauni Werke Koerber & Co Kg Tobacco density testing method and apparatus
EP0101580A1 (en) * 1982-08-25 1984-02-29 Berwind Corporation Capacitance-type material level indicator

Also Published As

Publication number Publication date
GB2218213B (en) 1990-07-04
GB2218213A (en) 1989-11-08
GB8910905D0 (en) 1989-06-28
GB8910904D0 (en) 1989-06-28
GB2218214A (en) 1989-11-08

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Legal Events

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

Effective date: 20001023