GB1213128A - Improvements in or relating to fluid level detecting devices - Google Patents
Improvements in or relating to fluid level detecting devicesInfo
- Publication number
- GB1213128A GB1213128A GB351467A GB351467A GB1213128A GB 1213128 A GB1213128 A GB 1213128A GB 351467 A GB351467 A GB 351467A GB 351467 A GB351467 A GB 351467A GB 1213128 A GB1213128 A GB 1213128A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- capacitors
- fluid
- amplifier
- feedback
- 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
- G01F23/266—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 measuring circuits therefor
-
- 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
-
- 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
- G01F23/268—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 mounting arrangements of probes
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
1,213,128. Monitoring fluid level electrically. C.I.A. ELLIS. Jan. 10, 1968 [Jan. 24, 1967], No.3514/67. Heading G1H. The capacitance values of first and second pairs of electrodes 10, 12 and 10, 14, Fig.3, are equal when a fluid level 18 (or the interface level between a pair of fluids) is located either below or above the position of the electrodes, but become unequal when the level registers with either one of the pairs or the space between. The capacitors C1, C2, Fig. 2, formed by the electrodes are connected in a bridge circuit to determine the feedback between the input and output of an amplifier A by way of a transformer L, Lc, the arrangement being such feedback occures to produce oscillation in the amplifier loop only when the bridge circuit is unbalanced. Thus, the production of oscillation indicates that the liquid or interface level occurs within the predetermined region of container 16, Fig. 3, occupied by the electrodes. A detecting and amplifying circuit may respond to the oscillations to actuate a visual or aural alarm. The electrodes may be mounted inside tube 16, and at least one may be coated with an insulating material which has no chemical reaction with the fluid in the tube. Where the tube is made of conductive material it may form electrode 10. Balancing capacitors may be connected across each of capacitors C1 and C2. In an alternative circuit arrangement, Fig. 1 (not shown), the two capacitors form the feedback connection from a phase-splitter at the output of the amplifier to the input. The term "fluid" is intended to embrace dry powders, sherries and suspensions as well as liquids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB351467A GB1213128A (en) | 1967-01-24 | 1967-01-24 | Improvements in or relating to fluid level detecting devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB351467A GB1213128A (en) | 1967-01-24 | 1967-01-24 | Improvements in or relating to fluid level detecting devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1213128A true GB1213128A (en) | 1970-11-18 |
Family
ID=9759770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB351467A Expired GB1213128A (en) | 1967-01-24 | 1967-01-24 | Improvements in or relating to fluid level detecting devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1213128A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3517781A1 (en) * | 1985-05-17 | 1986-10-16 | Heinrich Wüst KG, 7536 Ispringen | RC Oscillator with X-measuring capacitors |
| GB2329021A (en) * | 1997-09-05 | 1999-03-10 | Assembled Supplies | Fluid level monitor |
| FR2833699A1 (en) * | 2001-12-19 | 2003-06-20 | Bio Merieux | System to control the charging of receptacles with a sample liquid, in e.g. a container or analysis card, in which the presence or absence is registered together with the amount of air in each receptacle |
| GB2399643A (en) * | 2003-02-13 | 2004-09-22 | Jackson Mcs Inc | Non-contact liquid sensing apparatus, system, and method |
| DE102004019351A1 (en) * | 2003-12-22 | 2005-07-14 | BSH Bosch und Siemens Hausgeräte GmbH | Dishwasher with a system for level detection |
| US7748394B2 (en) | 2003-12-22 | 2010-07-06 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Dishwasher with a system for recognition of filling level |
| CN118090841A (en) * | 2024-04-26 | 2024-05-28 | 常熟理工学院 | Fluid stratification interface detection device, paraffin and PTFE separation device and method |
-
1967
- 1967-01-24 GB GB351467A patent/GB1213128A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3517781A1 (en) * | 1985-05-17 | 1986-10-16 | Heinrich Wüst KG, 7536 Ispringen | RC Oscillator with X-measuring capacitors |
| GB2329021A (en) * | 1997-09-05 | 1999-03-10 | Assembled Supplies | Fluid level monitor |
| FR2833699A1 (en) * | 2001-12-19 | 2003-06-20 | Bio Merieux | System to control the charging of receptacles with a sample liquid, in e.g. a container or analysis card, in which the presence or absence is registered together with the amount of air in each receptacle |
| WO2003052359A1 (en) * | 2001-12-19 | 2003-06-26 | Biomerieux | Device for the capacitive measuring of a fill level |
| GB2399643A (en) * | 2003-02-13 | 2004-09-22 | Jackson Mcs Inc | Non-contact liquid sensing apparatus, system, and method |
| DE102004019351A1 (en) * | 2003-12-22 | 2005-07-14 | BSH Bosch und Siemens Hausgeräte GmbH | Dishwasher with a system for level detection |
| US7748394B2 (en) | 2003-12-22 | 2010-07-06 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Dishwasher with a system for recognition of filling level |
| CN118090841A (en) * | 2024-04-26 | 2024-05-28 | 常熟理工学院 | Fluid stratification interface detection device, paraffin and PTFE separation device and method |
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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 |