| 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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| 09/23/1998 | EP0866322A1 Apparatus and method for sensing a full level condition for a large basket, receptacle or the like | 
| 09/23/1998 | EP0866321A2 Sensor arrangement | 
| 09/23/1998 | EP0746764A4 Ultrasonic transducer system with temporal crosstalk isolation | 
| 09/23/1998 | CN2292278Y Ultrasonic wave liquid level measurer | 
| 09/23/1998 | CN2292277Y Antiscale solid-core water level water temp. test bar | 
| 09/23/1998 | CN2292276Y Three-color interfacial meter | 
| 09/22/1998 | US5812168 Air purging of a pressure regulated free-ink ink-jet pen | 
| 09/22/1998 | US5811688 Open channel flowmeter utilizing surface velocity and lookdown level devices | 
| 09/22/1998 | US5811677 Material interface level sensing | 
| 09/22/1998 | US5809795 Fuzzy logic liquid level control | 
| 09/22/1998 | CA2149328C Radar distance measuring device | 
| 09/17/1998 | WO1998040700A1 Device for measuring hydraulic discharge volumes and leakages in a test piece | 
| 09/17/1998 | DE19802227A1 Immersion pump with lower and upper housing sections | 
| 09/17/1998 | DE19709738A1 Measuring system for level position of liquid in tank especially fuel tank for IC engines | 
| 09/17/1998 | CA2200104A1 Water alarm | 
| 09/16/1998 | EP0824671B1 Capacitive level sensor | 
| 09/16/1998 | EP0683887B1 Rejecting noise in magnetostrictive position detector by determining valid time range for propagation of reference sonic pulses | 
| 09/16/1998 | CN2291648Y Floating ball level controller | 
| 09/16/1998 | CN2291647Y Digital display fuel gauge for vehicles and ships | 
| 09/16/1998 | CN2291646Y Flushing monitor of water-level gauge for boiler | 
| 09/16/1998 | CN2291645Y Integrated infra-red electric liquid level probe | 
| 09/16/1998 | CN1193103A Passive liquid-level sensor | 
| 09/15/1998 | US5808195 Arrangement for determining liquid velocity versus depth utilizing historical data | 
| 09/15/1998 | US5808187 Fluid level indicator | 
| 09/15/1998 | US5807092 Method of and device for detecting the residual of gas quantity in a cassette-type gas cylinder | 
| 09/15/1998 | US5806363 Tank level gauge of driven sensor type | 
| 09/11/1998 | WO1998039623A1 Probe and sensor for liquids | 
| 09/10/1998 | DE19709422A1 Vorrichtung zur Messung von hydraulischen Durchflußmengen und Leckagen an einem Prüfling Device for measuring hydraulic flow rates and leakages in a test piece | 
| 09/09/1998 | EP0862745A1 Nuclear magnetic resonance level gauging device | 
| 09/09/1998 | CN2290842Y Code disk type magnetic float tank gage | 
| 09/09/1998 | CN2290841Y Auto-tracking content meter for liquid storage cylinder | 
| 09/09/1998 | CN2290840Y Material quantity measuring device in high temp and high pressure reaction still | 
| 09/09/1998 | CN2290839Y Tank gage having mobile electrical contact | 
| 09/09/1998 | CN2290838Y One-side plate glass water level meter | 
| 09/09/1998 | CN1192530A Method for measuring water level of iced water body | 
| 09/08/1998 | US5805110 Method for sensing characteristics of objects within a field | 
| 09/08/1998 | US5804831 Liquid level sensor for use in a hot, pressurized liquid | 
| 09/08/1998 | US5802910 Measuring system for liquid volumes and liquid levels of any type | 
| 09/08/1998 | US5802728 Liquid level and angle detector | 
| 09/03/1998 | WO1998038528A1 Condensate free ultrasonic transmitter | 
| 09/03/1998 | WO1998038059A1 Motor vehicle display system | 
| 09/03/1998 | CA2282587A1 Condensate free ultrasonic transmitter | 
| 09/02/1998 | CN2290037Y Automatic display metering device for high level liquid tank | 
| 09/02/1998 | CN2290036Y Liquid level measuring instrument | 
| 09/02/1998 | CN2290035Y Prism liquid level gauge glass | 
| 09/02/1998 | CN1191952A Corrosion resistant method for water-lever measuring device and water-lever regulator of boiler | 
| 09/01/1998 | US5800262 Acoustic volume and torque weight sensor | 
| 09/01/1998 | US5799534 Procedure for measuring the level of a liquid in a tank according to the radar principle | 
| 08/27/1998 | DE19741067A1 Fill level detection arrangement | 
| 08/27/1998 | DE19707139A1 Opto-electronic gas production detection and measurement arrangement | 
| 08/27/1998 | DE19707084A1 System for controlled filling of small open=topped container with liquid | 
| 08/26/1998 | EP0860284A2 Liquid level detection system, liquid-jet printing apparatus and liquid container | 
| 08/26/1998 | EP0859966A2 Method for fixing the position, with respect to the direction and range, of a target with an ultrasonic transducer | 
| 08/26/1998 | EP0859945A2 Ultrasonic monitoring technique for containers and apparatus to carry it out | 
| 08/26/1998 | EP0645017B1 Liquid dispensing system | 
| 08/26/1998 | CN2289225Y Magnetic tracking colour board liquid level meter | 
| 08/26/1998 | CN2289224Y Infrared level indicator | 
| 08/26/1998 | CN2289223Y Liquid level-limited optical fibre detector | 
| 08/26/1998 | CN2289222Y Contactless liquid level transmitter | 
| 08/26/1998 | CN2289221Y Capacitive continuous detecting bin level indicator | 
| 08/26/1998 | CN2289220Y Water level alarm device | 
| 08/26/1998 | CN2289219Y 液位探测仪 Level Detector | 
| 08/26/1998 | CN2289218Y Three-colour tubular liquid level indicator | 
| 08/26/1998 | CN2289217Y Integral ultrasonic level meter | 
| 08/25/1998 | US5798698 Method of monitoring the level of a liquid in a container | 
| 08/20/1998 | WO1998036490A1 Microwave pulse generator and pulse-echo ranging system | 
| 08/20/1998 | WO1998036250A1 Dosing system for the dosing of liquids, and method and use of the system | 
| 08/20/1998 | DE19704683A1 Oil level sensor e.g. for motor vehicle | 
| 08/20/1998 | CA2280763A1 Microwave pulse generator and pulse-echo ranging system | 
| 08/19/1998 | EP0859223A1 Metal level detection method and apparatus | 
| 08/19/1998 | EP0858349A1 Optical dose measurements in syringes | 
| 08/19/1998 | EP0767897A4 Thickener mud gauge | 
| 08/19/1998 | CN2288426Y 液体液位显示装置 Liquid level display device | 
| 08/19/1998 | CN2288425Y Ultrasonic liquid level measurer for oil tank | 
| 08/19/1998 | CN2288424Y Infra-red detector for material | 
| 08/19/1998 | CN2288423Y Electronic fluid level indicator | 
| 08/13/1998 | WO1998025109A3 Material level sensing | 
| 08/13/1998 | CA2226313A1 Metal level detection method and apparatus | 
| 08/12/1998 | EP0857954A1 Cord level detector | 
| 08/12/1998 | EP0857295A1 Level sensor and washer unit | 
| 08/12/1998 | EP0830575A4 Liquid level gauge assembly including potentiometer with conductive polymeric element | 
| 08/11/1998 | US5793705 Ultrasonic liquid level gauge for tanks subject to movement and vibration | 
| 08/11/1998 | US5793294 Sump alarm | 
| 08/11/1998 | US5793200 Position responsive magnetic sensing elements for sensing the position of a member at a remote site | 
| 08/11/1998 | US5792117 Apparatus for optically determining and electronically recording injection doses in syringes | 
| 08/11/1998 | US5791187 Level measurement method using measurements of water column pressure therefor | 
| 08/11/1998 | CA2197248A1 Float device | 
| 08/06/1998 | WO1998024013A3 Material interface level sensing | 
| 08/06/1998 | DE19703378A1 Measurement probe | 
| 08/05/1998 | EP0856725A1 Method and device for determining the quantity of product present in a reservoir, a product reservoir and a device for processing electrical signals intended for such a determination device | 
| 08/05/1998 | EP0856724A1 Method and device for determining the quantity of product present in a reservoir, a product resevoir and a device for processing electrical signals intended for such a determination device | 
| 08/05/1998 | EP0856722A1 Length measuring apparatus employing magnetostrictive delay line | 
| 08/05/1998 | EP0856150A1 Method and device for liquid leakage indication | 
| 08/05/1998 | CN2287297Y Universal magnet buoy | 
| 08/04/1998 | USH1743 Inventory management method and apparatus | 
| 08/04/1998 | US5790422 Method and apparatus for determining the quantity of a liquid in a container independent of its spatial orientation | 
| 08/04/1998 | US5789675 Disposable electromagnetic fluid level sensor | 
| 07/30/1998 | WO1998033044A1 Capacitative level detector with optimized electrode geometry | 
| 07/30/1998 | DE19713267A1 Verfahren zur Bestimmung der Dielektrizitätskonstante und/oder der Leitfähigkeit mindestens eines Mediums sowie Vorrichtung zur Durchführung des Verfahrens A method for determining the dielectric constant and / or conductivity of at least one medium, and apparatus for carrying out the method | 
| 07/30/1998 | DE19703101A1 Device for controlling full level limit in strong=walled closed containers |