GB1385595A - Method and apparatus for pressure and flow measurement - Google Patents

Method and apparatus for pressure and flow measurement

Info

Publication number
GB1385595A
GB1385595A GB2864072A GB2864072A GB1385595A GB 1385595 A GB1385595 A GB 1385595A GB 2864072 A GB2864072 A GB 2864072A GB 2864072 A GB2864072 A GB 2864072A GB 1385595 A GB1385595 A GB 1385595A
Authority
GB
United Kingdom
Prior art keywords
thermistors
difference
flow
fluid flow
branches
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
Application number
GB2864072A
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.)
F Hoffmann La Roche AG
Original Assignee
F Hoffmann La Roche 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 F Hoffmann La Roche AG filed Critical F Hoffmann La Roche AG
Publication of GB1385595A publication Critical patent/GB1385595A/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
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/6842—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow with means for influencing the fluid flow

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

1385595 Measuring pressure fluid flow electrically F HOFFMANN-LA ROCHE & CO AG 19 June 1972 [26 July 1971] 28640/72 Heading GIN Apparatus for measuring the differential pressure P 1 -P 2 between two locations in a fluid includes a conduit 11 supplying an auxiliary fluid flow to the locations by way of two branches 12, 13 carrying respective flows Z 1 , Z 2 and having respective thermistors 16, 17 and restrictors 14, 15 whereby the difference in flow rates between the branches may be determined, the flow rate difference being significant of the pressure difference between the two locations. The thermistors are connected to respective constant current sources 18, 19 and to a differential amplifier 21 whereby the difference in potential drops across them is determined. In an alternative embodiment, for measuring fluid flow 23 rate in pipeline 22, a tube 25 is arranged at right-angles to the pipe line 22 and supplying an auxiliary fluid flow thereto by way of two branches or ducts 27, 28 of equal cross section and having thermistors 32, 33 and restrictors 29, 31, the ends of the ducts being turned through 90 degrees to face respectively upstream and downstream of the flow 23. As before amplifier 21 determines potential difference between the thermistors which is representative of the flow rate in pipe 22. Thermocouples may be used instead of thermistors.
GB2864072A 1971-07-26 1972-06-19 Method and apparatus for pressure and flow measurement Expired GB1385595A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1096071A CH541136A (en) 1971-07-26 1971-07-26 Method and device for pressure and flow measurement

Publications (1)

Publication Number Publication Date
GB1385595A true GB1385595A (en) 1975-02-26

Family

ID=4368617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2864072A Expired GB1385595A (en) 1971-07-26 1972-06-19 Method and apparatus for pressure and flow measurement

Country Status (11)

Country Link
BE (1) BE786691A (en)
CA (1) CA985929A (en)
CH (1) CH541136A (en)
DD (1) DD99441A5 (en)
DE (1) DE2236691A1 (en)
ES (1) ES405108A1 (en)
FR (1) FR2147167B1 (en)
GB (1) GB1385595A (en)
IL (1) IL39678A0 (en)
IT (1) IT956008B (en)
NL (1) NL7208048A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194059A (en) * 1986-08-13 1988-02-24 Mitsubishi Heavy Ind Ltd Failure diagnosing method for pressure sensor in refrigeration unit
IT201800005288A1 (en) * 2018-05-11 2019-11-11 MACHINE FOR HEMODIALYSIS EQUIPPED WITH A SYSTEM FOR MEASURING THE FLOW RATE OF A LIQUID AND RELATIVE METHOD OF OPERATION

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163390A (en) * 1977-04-14 1979-08-07 Rodder Jerome A Bipolar fluid measuring apparatus
DE3307126A1 (en) * 1983-03-01 1983-10-06 Esdorn Horst Process and devices for the continuous and three-point measurement of very small differential pressures
DE4026998A1 (en) * 1990-08-27 1991-03-14 Erhard Luginsland Monitor for continuous pressure ratio between two regions - contains temp. sensors before and after heater in connecting line

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194059A (en) * 1986-08-13 1988-02-24 Mitsubishi Heavy Ind Ltd Failure diagnosing method for pressure sensor in refrigeration unit
AU597998B2 (en) * 1986-08-13 1990-06-14 Mitsubishi Jukogyo Kabushiki Kaisha Failure diagnosing method for pressure sensor in refrigeration unit
GB2194059B (en) * 1986-08-13 1990-07-11 Mitsubishi Heavy Ind Ltd Failure diagnosing method for pressure sensor in refrigeration unit
IT201800005288A1 (en) * 2018-05-11 2019-11-11 MACHINE FOR HEMODIALYSIS EQUIPPED WITH A SYSTEM FOR MEASURING THE FLOW RATE OF A LIQUID AND RELATIVE METHOD OF OPERATION
EP3566729A1 (en) * 2018-05-11 2019-11-13 Medica S.p.A. Hemodialysis machine provided with a liquid flow measurement system and related method

Also Published As

Publication number Publication date
BE786691A (en) 1973-01-25
IT956008B (en) 1973-10-10
DD99441A5 (en) 1973-08-05
CH541136A (en) 1973-08-31
IL39678A0 (en) 1972-08-30
NL7208048A (en) 1973-01-30
CA985929A (en) 1976-03-23
FR2147167B1 (en) 1976-03-12
DE2236691A1 (en) 1973-02-08
FR2147167A1 (en) 1973-03-09
ES405108A1 (en) 1975-07-16

Similar Documents

Publication Publication Date Title
GB1094833A (en) Improvements in or relating to gauges
GB1304430A (en)
GB1526136A (en) Method and apparatus for the measurement of volumetric flowrate in pipes and ducts
GB1241349A (en) Improvements in and relating to devices for measuring liquid flow rates
GB1103809A (en) Method of and device for dividing flowing media into individual sections
GB808462A (en) Systems responsive to changes in the viscosity of a flowing liquid
GB1385595A (en) Method and apparatus for pressure and flow measurement
ES8501875A1 (en) Differential pressure measuring apparatus.
FR2355278A1 (en) FLUID FLOW MEASUREMENT DEVICE CARRIED IN A DUCT
GB1409498A (en) Differential pressure fluid flow meter
GB1174654A (en) Apparatus for Mixing Fluids
GB1089203A (en) Improvements in or relating to fluid flow measuring devices
GB1126954A (en) Flow rate measuring device
FR2425057A1 (en) METHOD AND APPARATUS FOR MEASURING A GAS FLOW, ESPECIALLY OF AIR
GB1008508A (en) Rotary flowmeter
US3034352A (en) Means for the measurement of the flow of a gas
GB767337A (en) Improvements in and relating to the measurement of the wetness of steam
JPS5760215A (en) Method and device for measuring flow rate of solid particle
GB1274651A (en) Improvements in or relating to flow measuring devices
GB1307659A (en) Mass flowmeter
GB1117391A (en) Improvements in rotary flow meters
DE3572536D1 (en) Pressureloss flow meter and apparatus for flow control using such a flow meter
GB882478A (en) Process and apparatus for measuring flow of fluids
GB1251872A (en)
GB1489870A (en) Sensing arrangements for fluid flow meters

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees