FI900592A7 - MAETKOPPLING FOER SMAO KAPASITANSER. - Google Patents

MAETKOPPLING FOER SMAO KAPASITANSER.

Info

Publication number: FI900592A7
Authority: FI; Finland
Prior art keywords: maetkoppling; kapasitanser; smao; foer; smao kapasitanser
Prior art date: 1990-02-07

Application number

FI900592A

Other languages

Finnish (fi)

Other versions

FI900592A0 (en

FI84666B (en

FI84666C (en

Inventor

Jorma Ponkala

Original Assignee

Vaisala Oy

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.)

1990-02-07

Filing date

1990-02-07

Publication date

1991-08-08

1990-02-07 Application filed by Vaisala Oy filed Critical Vaisala Oy

1990-02-07 Publication of FI900592A0 publication Critical patent/FI900592A0/en

1990-02-07 Priority to FI900592A priority Critical patent/FI84666C/en

1991-01-21 Priority to AU69491/91A priority patent/AU6949191A/en

1991-01-23 Priority to ZA91506A priority patent/ZA91506B/en

1991-01-29 Priority to GB9101869A priority patent/GB2242279A/en

1991-02-05 Priority to DE4103433A priority patent/DE4103433A1/en

1991-02-06 Priority to ITMI910300A priority patent/IT1245137B/en

1991-02-06 Priority to BR919100486A priority patent/BR9100486A/en

1991-02-07 Priority to FR9101380A priority patent/FR2657963A1/en

1991-02-07 Priority to CA002035909A priority patent/CA2035909A1/en

1991-08-08 Publication of FI900592A7 publication Critical patent/FI900592A7/en

1991-09-13 Publication of FI84666B publication Critical patent/FI84666B/en

1991-12-27 Application granted granted Critical

1991-12-27 Publication of FI84666C publication Critical patent/FI84666C/en

Classifications

- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Measurement Of Resistance Or Impedance (AREA)

FI900592A 1990-02-07 1990-02-07 MAETKOPPLING FOER SMAO KAPASITANSER. FI84666C (en)

Priority Applications (9)

Application Number	Priority Date	Filing Date	Title
FI900592A FI84666C (en)	1990-02-07	1990-02-07	MAETKOPPLING FOER SMAO KAPASITANSER.
AU69491/91A AU6949191A (en)	1990-02-07	1991-01-21	Measurement coupling for low capacitances
ZA91506A ZA91506B (en)	1990-02-07	1991-01-23	Measurement coupling for low capacitances
GB9101869A GB2242279A (en)	1990-02-07	1991-01-29	Measuring low capacitances
DE4103433A DE4103433A1 (en)	1990-02-07	1991-02-05	MEASURING CIRCUIT FOR SMALL CAPACITIES
ITMI910300A IT1245137B (en)	1990-02-07	1991-02-06	COUPLING FOR LOW CAPACITY MEASUREMENT
BR919100486A BR9100486A (en)	1990-02-07	1991-02-06	COUPLING FOR LOW CAPACITY MEASUREMENT
FR9101380A FR2657963A1 (en)	1990-02-07	1991-02-07	MEASURING CIRCUIT FOR LOW CAPACITIES.
CA002035909A CA2035909A1 (en)	1990-02-07	1991-02-07	Measurement coupling for low capacitances

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FI900592		1990-02-07
FI900592A FI84666C (en)	1990-02-07	1990-02-07	MAETKOPPLING FOER SMAO KAPASITANSER.

Publications (4)

Publication Number	Publication Date
FI900592A0 FI900592A0 (en)	1990-02-07
FI900592A7 true FI900592A7 (en)	1991-08-08
FI84666B FI84666B (en)	1991-09-13
FI84666C FI84666C (en)	1991-12-27

Family

ID=8529843

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FI900592A FI84666C (en)	1990-02-07	1990-02-07	MAETKOPPLING FOER SMAO KAPASITANSER.

Country Status (9)

Country	Link
AU (1)	AU6949191A (en)
BR (1)	BR9100486A (en)
CA (1)	CA2035909A1 (en)
DE (1)	DE4103433A1 (en)
FI (1)	FI84666C (en)
FR (1)	FR2657963A1 (en)
GB (1)	GB2242279A (en)
IT (1)	IT1245137B (en)
ZA (1)	ZA91506B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19513022C1 (en) *	1995-04-06	1996-08-14	Siemens Ag	Differential capacitance measuring circuit for pressure sensor
DE19625666C1 (en) *	1996-06-26	1998-01-15	Siemens Ag	Readout shaft and capacitive measuring sensor
DE102004006020A1 (en)	2004-02-06	2005-08-25	E + E Elektronik Ges.M.B.H.	Circuit arrangement for capacitive humidity measurement and method for operating the same
US8030949B2 (en) *	2008-10-31	2011-10-04	Testo Ag	Measurement method for determining moisture content
CN101738422B (en) *	2009-12-23	2012-09-05	北京宝力马传感技术有限公司	Humidity measuring device and method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3886447A (en) *	1972-05-17	1975-05-27	Iwatsu Electric Co Ltd	Capacitance-voltage converter
GB2058364B (en) *	1979-09-01	1983-03-23	Ferranti Ltd	Capacitance measuring apparatus
US4794320A (en) *	1987-08-10	1988-12-27	Moore Products Co.	Multi-frequency capacitance sensor

1990
- 1990-02-07 FI FI900592A patent/FI84666C/en not_active IP Right Cessation
1991
- 1991-01-21 AU AU69491/91A patent/AU6949191A/en not_active Abandoned
- 1991-01-23 ZA ZA91506A patent/ZA91506B/en unknown
- 1991-01-29 GB GB9101869A patent/GB2242279A/en not_active Withdrawn
- 1991-02-05 DE DE4103433A patent/DE4103433A1/en not_active Ceased
- 1991-02-06 BR BR919100486A patent/BR9100486A/en not_active Application Discontinuation
- 1991-02-06 IT ITMI910300A patent/IT1245137B/en active IP Right Grant
- 1991-02-07 CA CA002035909A patent/CA2035909A1/en not_active Abandoned
- 1991-02-07 FR FR9101380A patent/FR2657963A1/en active Pending

Also Published As

Publication number	Publication date
FR2657963A1 (en)	1991-08-09
FI900592A0 (en)	1990-02-07
IT1245137B (en)	1994-09-13
BR9100486A (en)	1991-10-29
GB9101869D0 (en)	1991-03-13
FI84666B (en)	1991-09-13
ITMI910300A0 (en)	1991-02-06
FI84666C (en)	1991-12-27
ZA91506B (en)	1991-10-30
GB2242279A (en)	1991-09-25
DE4103433A1 (en)	1991-08-08
ITMI910300A1 (en)	1992-08-06
CA2035909A1 (en)	1991-08-08
AU6949191A (en)	1991-08-08

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Legal Events

Date	Code	Title	Description
2004-08-31	MM	Patent lapsed	Owner name: VAISALA OY