GB0220352D0 - Apparatus and methods for heat loss pressure measurement - Google Patents

Apparatus and methods for heat loss pressure measurement

Info

Publication number
GB0220352D0
GB0220352D0 GBGB0220352.9A GB0220352A GB0220352D0 GB 0220352 D0 GB0220352 D0 GB 0220352D0 GB 0220352 A GB0220352 A GB 0220352A GB 0220352 D0 GB0220352 D0 GB 0220352D0
Authority
GB
United Kingdom
Prior art keywords
methods
pressure measurement
heat loss
loss pressure
heat
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
GBGB0220352.9A
Other versions
GB2375825A (en
GB2375825B (en
GB2375825A8 (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.)
Azenta Inc
Original Assignee
Helix Technology Corp
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 US09/583,339 external-priority patent/US6658941B1/en
Application filed by Helix Technology Corp filed Critical Helix Technology Corp
Publication of GB0220352D0 publication Critical patent/GB0220352D0/en
Publication of GB2375825A publication Critical patent/GB2375825A/en
Publication of GB2375825A8 publication Critical patent/GB2375825A8/en
Application granted granted Critical
Publication of GB2375825B publication Critical patent/GB2375825B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L21/00—Vacuum gauges
    • G01L21/10—Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured
    • G01L21/12—Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
GB0220352A 2000-05-31 2001-05-09 Apparatus and methods for heat loss pressure measurement Expired - Fee Related GB2375825B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/583,339 US6658941B1 (en) 1997-07-21 2000-05-31 Apparatus and methods for heat loss pressure measurement
GB0111285A GB2368647B (en) 2000-05-31 2001-05-09 Apparatus and methods for heat loss pressure measurement

Publications (4)

Publication Number Publication Date
GB0220352D0 true GB0220352D0 (en) 2002-10-09
GB2375825A GB2375825A (en) 2002-11-27
GB2375825A8 GB2375825A8 (en) 2002-12-12
GB2375825B GB2375825B (en) 2003-05-14

Family

ID=26246049

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0220352A Expired - Fee Related GB2375825B (en) 2000-05-31 2001-05-09 Apparatus and methods for heat loss pressure measurement

Country Status (1)

Country Link
GB (1) GB2375825B (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2105047B (en) * 1981-08-28 1986-04-03 British Oxygen Co Ltd Pirani gauges

Also Published As

Publication number Publication date
GB2375825A (en) 2002-11-27
GB2375825B (en) 2003-05-14
GB2375825A8 (en) 2002-12-12

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Legal Events

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

Effective date: 20090509