ES8102353A1 - Flowable medium detector with heater - has two temp.-dependent semiconductor devices of different thermal ranges, from whose differences medium presence is determined - Google Patents
Flowable medium detector with heater - has two temp.-dependent semiconductor devices of different thermal ranges, from whose differences medium presence is determinedInfo
- Publication number
- ES8102353A1 ES8102353A1 ES487103A ES487103A ES8102353A1 ES 8102353 A1 ES8102353 A1 ES 8102353A1 ES 487103 A ES487103 A ES 487103A ES 487103 A ES487103 A ES 487103A ES 8102353 A1 ES8102353 A1 ES 8102353A1
- Authority
- ES
- Spain
- Prior art keywords
- temp
- semiconductor devices
- detector
- medium
- heater
- 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
- 239000004065 semiconductor Substances 0.000 title abstract 6
- 230000001419 dependent effect Effects 0.000 title abstract 2
- 230000009969 flowable effect Effects 0.000 title abstract 2
- 238000007598 dipping method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 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
- G01F23/24—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 resistance of resistors due to contact with conductor fluid
- G01F23/246—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 resistance of resistors due to contact with conductor fluid thermal devices
- G01F23/247—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 resistance of resistors due to contact with conductor fluid thermal devices for discrete levels
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
The first temp.-dependent semiconductor device for the detector is supplied with current sufficient to heat the detector above ambient temp. The device is dipped into the measured medium, which provides a greater temp. gradient. A second semiconductor device for dipping into the measured medium is supplied with a lower current than the first one. Thus its heating effect is lower. The flowable medium is detected by differences between the two semiconductor devices. Pref. the two semiconductor devices are mounted at the same height, relative to the surface of the measured medium so that they are dipped into it, or retracted from it simultaneously. The temp. differences may be used for cutting off the voltage at both semiconductor devices so that the voltage difference may be also used for the detecting process. Typically Zener diodes are used and their anodes are interconnected. The detector finds application in liquid level measurement, or in aircraft height determination.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7849472 | 1978-12-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES487103A0 ES487103A0 (en) | 1980-12-16 |
| ES8102353A1 true ES8102353A1 (en) | 1980-12-16 |
Family
ID=10501861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES487103A Expired ES8102353A1 (en) | 1978-12-21 | 1979-12-20 | Flowable medium detector with heater - has two temp.-dependent semiconductor devices of different thermal ranges, from whose differences medium presence is determined |
Country Status (6)
| Country | Link |
|---|---|
| DE (1) | DE2950762A1 (en) |
| ES (1) | ES8102353A1 (en) |
| FR (1) | FR2450446B1 (en) |
| IN (1) | IN153363B (en) |
| IT (1) | IT1164787B (en) |
| SE (1) | SE444860B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3639435A1 (en) * | 1986-11-18 | 1988-05-26 | Hoelter Heinz | Volume flow monitoring system for filtering devices |
| EP0463192A1 (en) * | 1990-06-23 | 1992-01-02 | Dieter Bohn | Method and device to measure fluid level in liquid containers |
| DE102017210152A1 (en) * | 2017-06-19 | 2018-12-20 | Ab Elektronik Sachsen Gmbh | Device for detecting media |
| DE102017210153A1 (en) | 2017-06-19 | 2018-12-20 | Ab Elektronik Sachsen Gmbh | Device for level detection of media in containers |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3302458A (en) * | 1963-10-09 | 1967-02-07 | American Radiator & Standard | Liquid level sensing device |
| DE2132452C3 (en) * | 1971-06-30 | 1979-02-01 | Robert Bosch Gmbh, 7000 Stuttgart | Device for measuring and checking liquid levels in containers |
-
1979
- 1979-11-20 IN IN831/DEL/79A patent/IN153363B/en unknown
- 1979-12-17 DE DE19792950762 patent/DE2950762A1/en active Granted
- 1979-12-18 IT IT51124/79A patent/IT1164787B/en active
- 1979-12-20 SE SE7910503A patent/SE444860B/en not_active IP Right Cessation
- 1979-12-20 ES ES487103A patent/ES8102353A1/en not_active Expired
- 1979-12-20 FR FR7931304A patent/FR2450446B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2450446B1 (en) | 1985-08-30 |
| IN153363B (en) | 1984-07-07 |
| ES487103A0 (en) | 1980-12-16 |
| IT7951124A0 (en) | 1979-12-18 |
| IT1164787B (en) | 1987-04-15 |
| DE2950762C2 (en) | 1988-05-26 |
| SE444860B (en) | 1986-05-12 |
| SE7910503L (en) | 1980-06-22 |
| DE2950762A1 (en) | 1980-07-03 |
| FR2450446A1 (en) | 1980-09-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 20001218 |