GB1255054A - Measuring rates of flow of fluids - Google Patents

Measuring rates of flow of fluids

Info

Publication number
GB1255054A
GB1255054A GB856469A GB856469A GB1255054A GB 1255054 A GB1255054 A GB 1255054A GB 856469 A GB856469 A GB 856469A GB 856469 A GB856469 A GB 856469A GB 1255054 A GB1255054 A GB 1255054A
Authority
GB
United Kingdom
Prior art keywords
flow
fluid
feb
resistors
fluids
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
GB856469A
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of GB1255054A publication Critical patent/GB1255054A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/37—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using pneumatic detection
    • 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
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters

Abstract

1,255,054. Measuring fluid-flow electrically. SIEMENS-AG. Feb.17, 1969 [Feb. 15, 1968], No. 8564/69. Heading G1N. The rate of flow of a fluid, e.g. gas from an infrared gas analysis apparatus, is measured by a bridge circuit including in its arms a pair of thermally coupled temperature-dependent resistive elements G1 G2, in the form of planar grids, the elements G1, G2 being spaced along and lying transverse to the direction of flow of fluid so that the upstream resister is cooled and the downstream resistor is heated. The values of temperature independent resistors K1, K2 are chosen, after selection of the resistors G1 G2, so that the bridge has the same measuring sensitivity for different ambient temperatures, with a given constant-voltage supply UK.
GB856469A 1968-02-15 1969-02-17 Measuring rates of flow of fluids Expired GB1255054A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0114146 1968-02-15

Publications (1)

Publication Number Publication Date
GB1255054A true GB1255054A (en) 1971-11-24

Family

ID=7532980

Family Applications (1)

Application Number Title Priority Date Filing Date
GB856469A Expired GB1255054A (en) 1968-02-15 1969-02-17 Measuring rates of flow of fluids

Country Status (1)

Country Link
GB (1) GB1255054A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3196659A1 (en) * 2016-01-19 2017-07-26 Siemens Aktiengesellschaft Flow sensor and method for producing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3196659A1 (en) * 2016-01-19 2017-07-26 Siemens Aktiengesellschaft Flow sensor and method for producing the same
WO2017125481A1 (en) * 2016-01-19 2017-07-27 Siemens Aktiengesellschaft Flow sensor and method for the production thereof

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