GB796188A - Improvements in or relating to liquid level indicator - Google Patents
Improvements in or relating to liquid level indicatorInfo
- Publication number
- GB796188A GB796188A GB32287/55A GB3228755A GB796188A GB 796188 A GB796188 A GB 796188A GB 32287/55 A GB32287/55 A GB 32287/55A GB 3228755 A GB3228755 A GB 3228755A GB 796188 A GB796188 A GB 796188A
- Authority
- GB
- United Kingdom
- Prior art keywords
- meter
- oscillator
- liquid
- tank
- output
- 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
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)
- Level Indicators Using A Float (AREA)
Abstract
796,188. Electric tests. ARO EQUIPMENT CORPORATION. Nov. 11, 1955 [Aug. 15, 1955], No. 32287/55. Class 37. In a liquid level indicator using the dielectric properties of the liquid to change the capacity of a condenser as the height of the liquid varies, the condenser forms part of an L-C resonant circuit which is connected in parallel with an indicating instrument supplied with the output from a fixed frequency oscillator. As shown, the amplified output from a crystal oscillator is fed through a blocking condenser 33 and rectifier 35 to a voltmeter 36. In parallel with meter 36 is a resonant circuit consisting of an inductance 46, a capacitance 47 and a variable capacitance provided by plates 12, 13 which dip into the liquid 11 in a tank 10. The resonant frequency of this L-C circuit is arranged to be higher than the oscillator frequency when tank 10 is empty so that minimum voltage is then applied to meter 36 whereas the impedance offered by the L-C circuit to the oscillator output rises with increase in the liquid level and the meter reading increases. A potential divider 38, 41 connected to a D.C. source 23 applies a D.C. voltage across the meter in opposition to the amplified oscillator output an adjustable wiper 39 being provided to adjust the zero setting of the meter when tank 10 is empty. The measuring range of the meter is variable by a wiper 43 as in resistor 42.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US796188XA | 1955-08-15 | 1955-08-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB796188A true GB796188A (en) | 1958-06-04 |
Family
ID=22151690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32287/55A Expired GB796188A (en) | 1955-08-15 | 1955-11-11 | Improvements in or relating to liquid level indicator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB796188A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3199350A (en) * | 1961-11-27 | 1965-08-10 | Gen Motors Corp | Capacitance type fuel gage |
| US3246180A (en) * | 1962-02-14 | 1966-04-12 | Socony Mobil Oil Co Inc | Control system for controlling the flow of fluids |
-
1955
- 1955-11-11 GB GB32287/55A patent/GB796188A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3199350A (en) * | 1961-11-27 | 1965-08-10 | Gen Motors Corp | Capacitance type fuel gage |
| US3246180A (en) * | 1962-02-14 | 1966-04-12 | Socony Mobil Oil Co Inc | Control system for controlling the flow of fluids |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2422742A (en) | Meter for measuring moisture content | |
| US2772393A (en) | Water-in-oil detector | |
| GB1073465A (en) | Non-contact thermometer | |
| US2570218A (en) | Remote-indicating fuel gauge | |
| US2866336A (en) | Liquid level gage | |
| US2562575A (en) | Electronic device for measuring physical constants | |
| US4045728A (en) | Direct reading inductance meter | |
| US2657579A (en) | Liquid level indicating device | |
| US2932970A (en) | Capacitance bridge oscillator | |
| US2518045A (en) | Electronic measuring and detecting apparatus | |
| GB796188A (en) | Improvements in or relating to liquid level indicator | |
| US2602838A (en) | Electrical measuring instrument | |
| US2710541A (en) | Apparatus for volume measurement | |
| US2769957A (en) | Comparator | |
| US2784375A (en) | Circuit resonance indicator | |
| GB1217611A (en) | Circuit arrangement for damping measurement | |
| US3611124A (en) | Measuring circuit including switching means for charging a capacitance with alternate polarities in each switching cycle | |
| GB903108A (en) | Electrical measuring apparatus | |
| US3417328A (en) | In-circuit inductance measuring circuit | |
| USRE23493E (en) | Liquid level uaige | |
| Guarnaschelli et al. | Direct-reading frequency meter | |
| US2481617A (en) | Reactance measuring device | |
| SU391458A1 (en) | ||
| US2534802A (en) | Liquid level gauge | |
| SU68559A1 (en) | Method for measuring equivalent electrical parameters of quartz |