US4926156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring the partial pressure of gases or vapors
Assignee: Siemens AG
•
Filing: 1989-03-14
•
Granted: 1990-05-15
•
Expires: 2009-03-14
Abstract
Abstract An apparatus comprising a chemically sensitive sensor material, having an electrical resistance or dielectric constant which changes under the effect of the gases or vapors. According to the invention, this sensor material, which comprises either hydrophobic metal complexes, or a mixture of at least one phthalide and at least one acidic compound, serves as resistance or as dielectric material. These sensor materials change their ion mobility and/or their ionic concentration under the effect of gases or vapors, thereby changing their resistance or capacitance. The change in resistance or the change in capacitance can expediently be converted into a frequency change by a multivibrator. Thus, one obtains an especially simple and very effective sensor for gases and vapors.
Inventors
- 👤 Franz Dickert
- 👤 Heinz Kimmel
- 👤 Gert Mages
- 👤 Sabine Schreiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:00
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/125; G01N27/126; G01N27/22; G01N27/221
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
100 words
An apparatus for continuously measuring the partial pressure of gases or vapors with a chemically sensitive sensor material, having an electrical resistance or dielectric constant that changes in response to a change in the partial pressure of the gas or vapor, the sensor material comprising: a dielectric material, having an ion mobility or ion concentration which changes in response to a change in the partial pressure of the gas or vapor, selected from the group consisting of a metal complex having at least one hydrophobing ligand and a mixture of at least one phthalide with at least one acidic component.
Claim 2
Independent Claim
100 words
An apparatus for continuously measuring the partial pressure of gases or vapors with a chemically sensitive sensor material, having an electrical resistance or dielectric constant that changes in response to a change in the partial pressure of the gas or vapor, the sensor material comprising: a dielectric material, having an ion mobility or ion concentration which changes in response to a change in the partial pressure of the gas or vapor, selected from the group consisting of a metal complex having at least one hydrophobing ligand and a mixture of at least one phthalide with at least one acidic component.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1, further comprising an a stable multivibrator which converts a change in the electric resistance or the dielectric constant into a change in frequency.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1, wherein the metal complex further comprises macrocyclic metal complexes.
Claim 5
Dependent Claim
14 words
The apparatus of claim 3, wherein the macrocyclic metal complex further comprises crown ether.
Claim 6
Dependent Claim
13 words
The apparatus of claim 3, wherein the macrocyclic metal complex further comprises §-benzo[15]crown-5.
Claim 7
Dependent Claim
13 words
The apparatus of claim 3, wherein the macrocyclic metal complex further comprises cryptands.
Claim 8
Dependent Claim
11 words
The apparatus of claim 6, wherein the cryptands further comprises §-benzo-cryptands.
Claim 9
Dependent Claim
13 words
The apparatus of claim 7, wherein the §-benzo-cryptands further comprise §-222 B .
Claim 10
Dependent Claim
11 words
The apparatus of claim 1, further comprising variably charged metal ions.
Claim 11
Dependent Claim
36 words
The apparatus of claim 9, wherein the variably charged metal ions are selected from the group consisting of sodium ion, Na + ; a potassium ions, K + ; and a magnesium ions, Mg ++ .
Claim 12
Dependent Claim
15 words
The apparatus of claim 1, further comprising metal complexes with counter ions of variable nucleophiles.
Claim 13
Dependent Claim
33 words
The apparatus of claim 11, wherein the metal complexes with counter ions of variable nucleophiles are selected from the group consisting of chloride anions, Cl - and perchlorate anions, ClO 4 - .
Claim 14
Dependent Claim
12 words
The apparatus of claim 1, further comprising at least one protic co-substance.
Claim 15
Dependent Claim
12 words
The apparatus of claim 13, wherein the protic co-substance further comprises pyrogallol.
Claim 16
Dependent Claim
12 words
The apparatus of claim 1, further comprising at least one aprotic co-substance.
Claim 17
Dependent Claim
13 words
The apparatus of claim 1, wherein the phthalide further comprises etherfied polyethylene glycols.
Claim 18
Dependent Claim
13 words
The apparatus of claim 1, wherein the phthalide further comprises a substitute phthalide.
Claim 19
Dependent Claim
12 words
The apparatus of claim 17, wherein the substitute phthalide further comprises 3-(N-methyl-3-indolyl)-6-dimethylaminophthalide.
Claim 20
Dependent Claim
13 words
The apparatus of claim 17, wherein the substitute phthalide further comprises a 3,3-diphenylphthalide.
Claim 21
Dependent Claim
11 words
The apparatus of claim 19, wherein the 3,3-diphenylphthalide further comprises 3,3-bis(p-dimethylaminophenyl)-6-dimethylaminophthalide.
Claim 22
Dependent Claim
11 words
The apparatus of claim 19, wherein the 3,3-diphenylphthalide further comprises 3-(p-dimethylaminophenyl)-3-(p-methoxyphenyl)-6-dimethylaminophthalide.
Claim 23
Dependent Claim
13 words
The apparatus of claim 1, wherein the acidic component further comprises phenolic acids.
Claim 24
Dependent Claim
12 words
The apparatus of claim 22, wherein the phenolic acids further comprise 2,2-bis(4-hydroxyphenyl)-propane.
Claim 25
Dependent Claim
12 words
The apparatus of claim 22, wherein the phenolic acid further comprises hydroxy-(phenyl)-bis(p-hydroxyphenyl)-menthane.
Claim 26
Dependent Claim
15 words
The apparatus of claim 1, wherein the sensor material is embedded in a matrix substance.
Claim 27
Independent Claim
14 words
The apparatus of claims 1, wherein the sensor material is arranged on one carrier.
Claim 28
Dependent Claim
26 words
The apparatus of claim 1 further comprising: a chamber containing the sensor material and a gas permeable membrane forming at least one side of the chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |