CA1070409A - Inductive liquid level sensing - Google Patents
Inductive liquid level sensingInfo
- Publication number
- CA1070409A CA1070409A CA226,510A CA226510A CA1070409A CA 1070409 A CA1070409 A CA 1070409A CA 226510 A CA226510 A CA 226510A CA 1070409 A CA1070409 A CA 1070409A
- Authority
- CA
- Canada
- Prior art keywords
- coil
- wire
- liquid
- detector
- amplifier circuit
- 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
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 51
- 230000001939 inductive effect Effects 0.000 title claims abstract description 7
- 230000010355 oscillation Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000010791 quenching Methods 0.000 abstract description 2
- 230000000171 quenching effect Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US48005274A | 1974-06-17 | 1974-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1070409A true CA1070409A (en) | 1980-01-22 |
Family
ID=23906484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA226,510A Expired CA1070409A (en) | 1974-06-17 | 1975-05-08 | Inductive liquid level sensing |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5133665A (https=) |
| AU (1) | AU8192875A (https=) |
| BR (1) | BR7503696A (https=) |
| CA (1) | CA1070409A (https=) |
| DE (1) | DE2526860A1 (https=) |
| DK (1) | DK265975A (https=) |
| ES (1) | ES438653A1 (https=) |
| FR (1) | FR2274903A1 (https=) |
| IT (1) | IT1036307B (https=) |
| NO (1) | NO752160L (https=) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5560801A (en) * | 1978-10-31 | 1980-05-08 | Toshiba Corp | Displacement detector |
| DE102005010351B4 (de) * | 2005-02-17 | 2012-08-16 | Sie Sensorik Industrie-Elektronik Gmbh | Sensoren zur Abfrage von Füllständen sowie zur Leitwertanalyse von leitfähigen Flüssigkeiten und Verfahren hierzu |
| DE102018107450A1 (de) * | 2018-03-28 | 2019-10-02 | Endress+Hauser Flowtec Ag | Vorrichtung zur Bestimmung eines Füllstands einer Flüssigkeit in einem Messrohr, und Durchflussmessgerät mit einer solchen Vorrichtung |
-
1975
- 1975-05-08 CA CA226,510A patent/CA1070409A/en not_active Expired
- 1975-06-09 AU AU81928/75A patent/AU8192875A/en not_active Expired
- 1975-06-11 BR BR4745/75D patent/BR7503696A/pt unknown
- 1975-06-12 DK DK265975A patent/DK265975A/da not_active Application Discontinuation
- 1975-06-16 IT IT68545/75A patent/IT1036307B/it active
- 1975-06-16 DE DE19752526860 patent/DE2526860A1/de active Pending
- 1975-06-16 JP JP50072135A patent/JPS5133665A/ja active Pending
- 1975-06-16 FR FR7518752A patent/FR2274903A1/fr active Granted
- 1975-06-17 ES ES438653A patent/ES438653A1/es not_active Expired
- 1975-06-17 NO NO752160A patent/NO752160L/no unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO752160L (https=) | 1975-12-18 |
| DK265975A (da) | 1975-12-18 |
| AU8192875A (en) | 1976-12-16 |
| IT1036307B (it) | 1979-10-30 |
| BR7503696A (pt) | 1976-06-29 |
| ES438653A1 (es) | 1977-06-16 |
| JPS5133665A (https=) | 1976-03-22 |
| DE2526860A1 (de) | 1976-02-05 |
| FR2274903B1 (https=) | 1977-12-02 |
| FR2274903A1 (fr) | 1976-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4165641A (en) | Liquid level sensing means | |
| US3743853A (en) | Adjustable proximity sensor | |
| US3500373A (en) | Method and apparatus for article theft detection | |
| US3473110A (en) | Electronic conductor detector and indicator | |
| US4021729A (en) | Cross-field ground fault sensor | |
| US3764819A (en) | Electronic switch actuated by proximity of the human body | |
| US4110740A (en) | Liquid level detecting apparatus | |
| US2354964A (en) | Liquid level sensitive apparatus | |
| US4010650A (en) | Apparatus for generating an electrical signal indicative of liquid level | |
| US6259069B1 (en) | Apparatus for detecting the presence of a cooking vessel | |
| JPH04227115A (ja) | 誘導近接スイッチ | |
| CA1070409A (en) | Inductive liquid level sensing | |
| US6084406A (en) | Half-cycle saturable-core magnetometer circuit | |
| US3350660A (en) | Vicinity detector | |
| CN107636434A (zh) | 采用电磁应答器和独立的阻抗变化寄生天线的温度测量系统 | |
| US3922564A (en) | Liquid level control | |
| US3916926A (en) | Liquid level control system | |
| EP0751403A1 (en) | Combined sensor | |
| US4110588A (en) | Indirect induction apparatus for heating fluids | |
| US4071875A (en) | Detector apparatus | |
| US4123729A (en) | Displacement transducer | |
| US3602806A (en) | Selective activity meter for laboratory animals | |
| US4091833A (en) | Device for detecting predetermined foaming conditions in fluids | |
| US4703235A (en) | Brushless DC motor | |
| US4283714A (en) | Magnetic keyboard system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |