GB1196033A - Improvements in Devices for Sensing the Presence of Liquid in Electrically Non-Conducting Tubes. - Google Patents
Improvements in Devices for Sensing the Presence of Liquid in Electrically Non-Conducting Tubes.Info
- Publication number
- GB1196033A GB1196033A GB3410467A GB3410467A GB1196033A GB 1196033 A GB1196033 A GB 1196033A GB 3410467 A GB3410467 A GB 3410467A GB 3410467 A GB3410467 A GB 3410467A GB 1196033 A GB1196033 A GB 1196033A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- sensing
- capacitor
- electrode
- housing
- 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
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
- G01F23/263—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 by measuring variations in capacitance of capacitors
- G01F23/265—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 by measuring variations in capacitance of capacitors for discrete levels
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
1196033 Detecting presence electrically D F C CRAWLEY 12 Sept 1968 [25 July 1967] 34104/67 Index G4N 4D N6DX N1C1 N3C A device for sensing the presence of a liquid in a non-conductive tube comprises a sensing capacitor C2, in which one electrode is in the form of a spring clip for gripping the tube, connected into the circuit shown in Fig.1. An adjustable capacitance C2 is adjusted to balance the circuit so that in the absence of liquid at capacitor C2 no current flows in the load RL. When liquid is present at capacitor C2, the circuit becomes unbalanced and current flows in the load RL. The device may be enclosed in a metallic housing (not shown) in which two coaxial holes are provided for the tube. The housing may serve as the other electrode of the sensing capacitor. The clip electrode and the housing may be coated with inculator material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3410467A GB1196033A (en) | 1967-07-25 | 1967-07-25 | Improvements in Devices for Sensing the Presence of Liquid in Electrically Non-Conducting Tubes. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3410467A GB1196033A (en) | 1967-07-25 | 1967-07-25 | Improvements in Devices for Sensing the Presence of Liquid in Electrically Non-Conducting Tubes. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1196033A true GB1196033A (en) | 1970-06-24 |
Family
ID=10361428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3410467A Expired GB1196033A (en) | 1967-07-25 | 1967-07-25 | Improvements in Devices for Sensing the Presence of Liquid in Electrically Non-Conducting Tubes. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1196033A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995488A (en) * | 1971-11-16 | 1976-12-07 | Fisons Limited | Dielectric change sensing device |
| WO1982003694A1 (en) * | 1981-04-24 | 1982-10-28 | Systems Inc Setra | Linear capacitive sensor system |
-
1967
- 1967-07-25 GB GB3410467A patent/GB1196033A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995488A (en) * | 1971-11-16 | 1976-12-07 | Fisons Limited | Dielectric change sensing device |
| WO1982003694A1 (en) * | 1981-04-24 | 1982-10-28 | Systems Inc Setra | Linear capacitive sensor system |
| US4386312A (en) * | 1981-04-24 | 1983-05-31 | Setra Systems, Inc. | Linear capacitive sensor system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
| PCNP | Patent ceased through non-payment of renewal fee |