DE69738371D1 - Heizer mit konischer heizdichtefunktion für massendurchflussmesser - Google Patents
Heizer mit konischer heizdichtefunktion für massendurchflussmesserInfo
- Publication number
- DE69738371D1 DE69738371D1 DE69738371T DE69738371T DE69738371D1 DE 69738371 D1 DE69738371 D1 DE 69738371D1 DE 69738371 T DE69738371 T DE 69738371T DE 69738371 T DE69738371 T DE 69738371T DE 69738371 D1 DE69738371 D1 DE 69738371D1
- Authority
- DE
- Germany
- Prior art keywords
- heater
- density function
- mass flowmeter
- heat density
- conical 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F5/00—Measuring a proportion of the volume flow
-
- 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
- G01F1/6847—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow where sensing or heating elements are not disturbing the fluid flow, e.g. elements mounted outside the flow duct
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US664141 | 1996-06-14 | ||
US08/664,141 US5693880A (en) | 1996-06-14 | 1996-06-14 | Heater with tapered heater density function for use with mass flowmeter |
PCT/US1997/008034 WO1997047951A1 (en) | 1996-06-14 | 1997-05-12 | Heater with tapered heater density function for use with mass flowmeter |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69738371D1 true DE69738371D1 (de) | 2008-01-24 |
DE69738371T2 DE69738371T2 (de) | 2008-11-27 |
Family
ID=24664720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69738371T Expired - Lifetime DE69738371T2 (de) | 1996-06-14 | 1997-05-12 | Heizer mit konischer heizdichtefunktion für massendurchflussmesser |
Country Status (6)
Country | Link |
---|---|
US (1) | US5693880A (de) |
EP (1) | EP0904525B1 (de) |
JP (1) | JP3540818B2 (de) |
AT (1) | ATE381000T1 (de) |
DE (1) | DE69738371T2 (de) |
WO (1) | WO1997047951A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1203213C (zh) * | 1997-11-06 | 2005-05-25 | 住友金属工业株式会社 | 酸浓度测定和自动控制的方法和装置 |
ATE222354T1 (de) * | 1997-12-30 | 2002-08-15 | Qualiflow S A | Verfahren zu herstellung von einem sensor für einen thermischen massendurchflussmesser |
US6595049B1 (en) * | 1999-06-18 | 2003-07-22 | Mks Instruments, Inc. | Thermal mass flow sensor with improved sensitivity and response time |
US6446504B1 (en) * | 2000-03-30 | 2002-09-10 | Mks Instruments, Inc. | Constant temperature gradient differential thermal mass flow sensor |
US6779394B2 (en) * | 2001-12-21 | 2004-08-24 | Mks Instruments, Inc. | Apparatus and method for thermal management of a mass flow controller |
US6668642B2 (en) * | 2001-12-21 | 2003-12-30 | Mks Instruments, Inc. | Apparatus and method for thermal isolation of thermal mass flow sensor |
WO2004010091A1 (en) * | 2002-07-19 | 2004-01-29 | Celerity Group Inc. | Variable resistance sensor with common reference leg |
US7296465B2 (en) | 2005-11-22 | 2007-11-20 | Mks Instruments, Inc. | Vertical mount mass flow sensor |
US8826731B2 (en) * | 2011-10-20 | 2014-09-09 | Honeywell International Inc. | Flow sensor with bypass taps in laminarizing channel and flow restrictor in a bypass channel |
DE202011109511U1 (de) * | 2011-12-23 | 2012-02-02 | Bürkert Werke GmbH | Massendurchflussmess- oder -regelgerät |
US9823106B2 (en) * | 2014-07-25 | 2017-11-21 | General Electric Company | Flow sensor with heated air collar |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3938384A (en) * | 1972-10-13 | 1976-02-17 | Tylan Corporation | Mass flow meter with reduced attitude sensitivity |
US4519246A (en) * | 1981-12-21 | 1985-05-28 | Advanced Semiconductor Materials International, N.V. | Improved flow meter |
US4464932A (en) * | 1982-07-12 | 1984-08-14 | Mks Instruments, Inc. | Thermal mass flowmetering |
US4686856A (en) * | 1983-02-28 | 1987-08-18 | Vavra Randall J | Mass flow meter |
US4548075A (en) * | 1984-02-02 | 1985-10-22 | Dresser Industries, Inc. | Fast responsive flowmeter transducer |
NL8900474A (nl) * | 1989-02-24 | 1990-09-17 | Bronkhorst High Tech Bv | Massa-debietmeter met temperatuursensoren. |
JP2592333B2 (ja) * | 1989-08-29 | 1997-03-19 | 株式会社日立製作所 | 空気流量センサ素子及びその製造方法 |
US5259243A (en) * | 1991-01-04 | 1993-11-09 | Dxl International, Inc. | Flow sensor |
US5142907A (en) * | 1991-04-17 | 1992-09-01 | Mks Instruments, Inc. | Constant temperature gradient fluid mass flow transducer |
JP2643665B2 (ja) * | 1991-06-13 | 1997-08-20 | 日本エム・ケー・エス 株式会社 | 流量センサ |
JPH06265390A (ja) * | 1993-03-16 | 1994-09-20 | Hitachi Ltd | 熱式空気流量計 |
US5511416A (en) * | 1993-09-15 | 1996-04-30 | Alicat Scientific, Inc. | Wide range laminar flow element |
US5461913A (en) * | 1994-06-23 | 1995-10-31 | Mks Instruments, Inc. | Differential current thermal mass flow transducer |
-
1996
- 1996-06-14 US US08/664,141 patent/US5693880A/en not_active Expired - Lifetime
-
1997
- 1997-05-12 WO PCT/US1997/008034 patent/WO1997047951A1/en active IP Right Grant
- 1997-05-12 JP JP50159298A patent/JP3540818B2/ja not_active Expired - Lifetime
- 1997-05-12 DE DE69738371T patent/DE69738371T2/de not_active Expired - Lifetime
- 1997-05-12 EP EP97922741A patent/EP0904525B1/de not_active Expired - Lifetime
- 1997-05-12 AT AT97922741T patent/ATE381000T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0904525A1 (de) | 1999-03-31 |
JP3540818B2 (ja) | 2004-07-07 |
US5693880A (en) | 1997-12-02 |
EP0904525B1 (de) | 2007-12-12 |
ATE381000T1 (de) | 2007-12-15 |
WO1997047951A1 (en) | 1997-12-18 |
DE69738371T2 (de) | 2008-11-27 |
EP0904525A4 (de) | 1999-04-07 |
WO1997047951A8 (en) | 2001-06-21 |
JP2000512756A (ja) | 2000-09-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |