| Patents for G01F 23 - Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm (31,056) |
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| 09/05/1990 | CN2061684U Level indicating alarm with digital display |
| 09/04/1990 | US4954997 Sensor device using lamb elastic waves for detecting the presence of a liquid at a predetermined level |
| 09/04/1990 | US4954724 Optical fuel gauge for vehicles |
| 09/04/1990 | US4953751 Overflow prevention for soft drink dispensers |
| 09/03/1990 | CA2011509A1 Optically powered sensor arrangements |
| 09/02/1990 | CA2010028A1 In-tank fuel reservoir with fuel level sensor |
| 08/30/1990 | DE4004728A1 EM wave conductor unit with internal reflective channel - having aperture to affect light beam travelling from LED to opto-electric receiver |
| 08/30/1990 | DE3905745A1 Filling level sensor for detecting a liquid level |
| 08/30/1990 | DE3905569A1 Measuring conductor |
| 08/29/1990 | EP0384373A1 Method and apparatus for testing liquid fillings in tanks |
| 08/29/1990 | CN2061275U Inductance type float tank gage |
| 08/28/1990 | US4952914 Washer fluid monitor |
| 08/28/1990 | US4952873 Compact head, signal enhancing magnetostrictive transducer |
| 08/28/1990 | US4952797 System and method for optically controlled acoustic transmission and reception |
| 08/28/1990 | US4951506 Rolling contact ohmic resistance position sensor |
| 08/23/1990 | DE3904859A1 Electrically operated appliance for preparing hot beverages, such as coffee, tea or the like |
| 08/23/1990 | DE3904824A1 Content indicator for liquid gas containers |
| 08/22/1990 | EP0382977A2 Fluid level gauge |
| 08/22/1990 | EP0382852A1 Device for determining the index of productivity and food ration of animals |
| 08/22/1990 | CN2060878U Three-colour liquid level indicator |
| 08/22/1990 | CN2060877U Glass body for observing two-color liquid level indicator |
| 08/21/1990 | US4950988 Two region, remanently magnetized position sensor |
| 08/16/1990 | EP0382491A1 Electrode for level detection |
| 08/16/1990 | EP0381894A1 Sight gauge installation for the remote sensing of a liquid-level |
| 08/16/1990 | EP0381824A1 Apparatus for preventing the accumulation of slags, in the prechamber of a pressure-switch |
| 08/16/1990 | EP0381762A1 Automatic milk counter for milking installation |
| 08/15/1990 | CN2060541U Gamma ray tank gage |
| 08/15/1990 | CN2060540U Pyramid liquid level pressure transducer |
| 08/14/1990 | US4949070 Locomotive lubrication level monitor |
| 08/14/1990 | US4948552 Ultrasonic wave sensor intended to come into contact with a wall at a high temperature and application of this sensor |
| 08/14/1990 | US4947689 Capacitive liquid sensor |
| 08/14/1990 | US4947652 Ice level control for flake-ice maker |
| 08/13/1990 | CA2000816A1 Diaphragm gauge for stand-alone liquid storage tanks |
| 08/09/1990 | WO1990009599A1 Device at a radar level gauge |
| 08/09/1990 | WO1990008966A1 Ultrasonic distance measuring |
| 08/08/1990 | EP0381250A2 Dual purpose thermometer in combination with a gas grill |
| 08/08/1990 | EP0380918A1 Improved fuel measurement technique |
| 08/08/1990 | EP0380737A1 Level indicator |
| 08/08/1990 | CN2060224U Damped pendulum body-place meter |
| 08/08/1990 | CN1044529A Method for measuring length, and apparatus for implementing method |
| 08/07/1990 | US4947476 Oil check light |
| 08/07/1990 | US4947247 Displacement measurement apparatus and method for an automated flow rotameter |
| 08/07/1990 | US4947036 Self-monitoring optical sensor having a ratiometric output signal |
| 08/07/1990 | US4946242 Optical part including integral combination of optical fiber and light emitting or receiving element and method of manufacturing the same |
| 08/02/1990 | DE3902107A1 Capacitive filling level and level measuring device |
| 08/01/1990 | EP0379855A1 Process for the measurement of lengths, and device for carrying out the process |
| 07/31/1990 | US4944336 Automatic control system for filling beverage containers |
| 07/31/1990 | US4944335 Level sensing system |
| 07/31/1990 | US4944183 Level gauge for liquid helium |
| 07/31/1990 | CA1272267A1 Automatic control system for filling beverage containers |
| 07/26/1990 | WO1990008304A1 Level sensor |
| 07/26/1990 | WO1990008303A1 Liquid level gauge |
| 07/26/1990 | DE3929344A1 Fuellstandsanzeige Fuellstandsanzeige |
| 07/24/1990 | US4943889 Electrostatic capacitor type sensing device |
| 07/24/1990 | US4943797 Device for temporarily blocking the re-measurement of an electric oil level measurement of a machine, particularly an internal combustion engine |
| 07/24/1990 | US4943773 Magnetostrictive linear displacement transducer having preselected zero crossing detector |
| 07/24/1990 | US4942764 Mounting head for a resistance-tape level sensor |
| 07/24/1990 | US4942669 Dipstick locator and wiper construction for automobiles |
| 07/19/1990 | DE3900705A1 Method for determining the water quantity in the washing container of a washing machine |
| 07/18/1990 | EP0378396A2 Apparatus and method for measuring mass flow of a liquid |
| 07/18/1990 | EP0378355A1 Fluid level sensor |
| 07/18/1990 | EP0378304A2 Capacitive liquid sensor |
| 07/18/1990 | EP0377974A2 Measurement and/or analysis of a variable volume sample |
| 07/18/1990 | EP0377776A1 Level sensor |
| 07/18/1990 | CN2059501U Lens body of bichromatic tank gage with prism in channel |
| 07/17/1990 | US4942351 System for monitoring a level of material, device therefor and methods of making the same |
| 07/17/1990 | US4942306 Fibre optic sensor for the continuous measurement liquids level and other parameters |
| 07/17/1990 | US4941268 Oil level gauge |
| 07/16/1990 | CA2007355A1 Method for measuring length, and apparatus for implementing the method |
| 07/13/1990 | CA2005385A1 Fuel measurement technique |
| 07/12/1990 | WO1990007696A1 Level gauge for liquid |
| 07/12/1990 | DE3900357A1 Gas extraction valve for liquid gas containers |
| 07/11/1990 | EP0377508A1 Capacitive liquid level sensor |
| 07/11/1990 | EP0168404B1 Fiber optic structure and method for making |
| 07/11/1990 | CN2059236U Clour luminous water guage |
| 07/11/1990 | CN2059235U Two-colour liquid level gage |
| 07/10/1990 | US4939932 Level measuring device |
| 07/05/1990 | DE3938409A1 Universal sensor operating circuit - has generator, waveguide, output-coupling and antenna |
| 07/04/1990 | EP0376646A2 System for radio transmission of liquid level data and for converting received data to volume data to be indicated |
| 07/04/1990 | CN2058979U Explosion-proof three-color alarm liquid level gauge |
| 07/03/1990 | US4939675 Digital system for controlling mechanical instrument gauges |
| 07/03/1990 | US4939504 Fluid detecting alarm system |
| 07/03/1990 | US4939457 Flexible tube sonic waveguide for determining liquid level |
| 07/03/1990 | US4938590 Liquid level indicator using laser beam |
| 06/28/1990 | WO1990007100A1 Process and device for measuring the flow rate of the liquid and gaseous phases of a flowing diphasic fluid |
| 06/28/1990 | DE3928615A1 Sample extraction needle sensor locating liq. surface - has light source with light conductor and two detectors with associated light conductors in needle holder |
| 06/28/1990 | DE3843979A1 Economy device for metering the quantity of water to be filled into a bathtub, with automatic water feed shut-off |
| 06/28/1990 | DE3843339A1 Arrangement for capacitive filling level measurement |
| 06/27/1990 | EP0375541A1 Device for measuring the level of liquid contained in a deep reservoir |
| 06/27/1990 | EP0374523A2 Method for monitoring centrally lubricated machine sets |
| 06/27/1990 | CN2058747U Leve meter for solid matter |
| 06/26/1990 | US4936681 For converting a physical value into an electric output signal |
| 06/26/1990 | US4936245 For use with a bin |
| 06/21/1990 | DE3842578A1 Filling machine for pouring liquids into vessels |
| 06/21/1990 | DE3842076A1 Filling level indication and automatic level control on a hydrostatic basis |
| 06/20/1990 | CN2058481U Float-type continuous output digital display level-meter |
| 06/20/1990 | CN2058480U 液位传感器 Level Sensors |
| 06/19/1990 | US4935727 Device for measuring the quantity of liquid contained in a tank |
| 06/19/1990 | US4935621 Optical switch with collimating lenses, antifreeze and/or index matching fluid for control of electrical equipment |
| 06/19/1990 | US4934191 Method for electromagnetic ultrasonic conversion for monitoring the fill level and bubble formation in enclosures containing liquid |