| 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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| 04/08/1998 | CN1178318A 液位检测器 Level detector |
| 04/08/1998 | CN1178270A Casing of water level sensor of washing machine |
| 04/07/1998 | US5736992 Pressure regulated free-ink ink-jet pen |
| 04/07/1998 | US5736855 Local buffer circuit for sonic waveguides |
| 04/07/1998 | US5736054 Method of determining values of operating parameters of a centrifuge |
| 04/07/1998 | US5735168 Animal feeder sight glass device |
| 04/07/1998 | US5735167 Method and arrangement for measuring liquid level |
| 04/07/1998 | US5735166 Ultrasonic micro-sensor for level leak alert and interface detector |
| 04/05/1998 | CA2231231A1 Remote flow sensor |
| 04/02/1998 | DE19650194C1 Fuel tank filling level limit device |
| 04/02/1998 | DE19640302A1 Verfahren und Einrichtung zur Messung des Füllstands einer kohlenstoffhaltigen Schüttung Method and device for measuring the level of a carbonaceous bed |
| 04/01/1998 | EP0833134A2 Level gauge |
| 04/01/1998 | EP0832748A2 Automatic ink interconnect between print cartridge and carriage |
| 04/01/1998 | CN2277266Y Once-used alarm infusion device |
| 04/01/1998 | CN1177946A Method and device for determining the quantity of product present in a reservoir |
| 03/31/1998 | US5734111 Apparatus for measuring the flow quantity of rivers and method thereof |
| 03/26/1998 | WO1998012514A1 Gauge for measuring liquid levels |
| 03/26/1998 | WO1998012513A1 Device for detection of when a test probe gets into contact with a liquid surface |
| 03/26/1998 | DE19740856A1 Device to measure the vertical position of a liq. boundary layer |
| 03/26/1998 | DE19637830A1 Opto=electronic device for monitoring container filling level |
| 03/25/1998 | EP0831309A1 Measuring apparatus for determining the position of the interface between two superimposed layers of immiscible liquids |
| 03/25/1998 | EP0831308A2 Apparatus for determining the contents of a gas bottle |
| 03/25/1998 | EP0831271A1 Level control apparatus for storage enclosures for liquid under pressure |
| 03/25/1998 | EP0830575A1 Liquid level gauge assembly including potentiometer with conductive polymeric element |
| 03/25/1998 | EP0830574A1 Two-wire level transmitter |
| 03/25/1998 | EP0830566A1 Light beam range finder |
| 03/25/1998 | CN2277065Y High precision liquid storage tank meter |
| 03/24/1998 | US5731824 Ink level sensing system for an ink jet printer |
| 03/24/1998 | US5730861 Swimming pool control system |
| 03/24/1998 | US5730026 Microprocessor-based liquid sensor and ice detector |
| 03/24/1998 | US5730025 Device for monitoring a predetermined level of a liquid in a container |
| 03/24/1998 | US5729990 Refrigeration system |
| 03/19/1998 | WO1998011583A1 Fluid level indicator sensor |
| 03/18/1998 | EP0829965A1 A circuit for driving a signaling device |
| 03/18/1998 | EP0829734A2 Method and device for measuring the difference in time of travel of an electrical, electromagnetic or acoustic signal |
| 03/18/1998 | EP0829705A1 Liquid level sensor |
| 03/18/1998 | EP0829020A2 Narrow field electromagnetic sensor system and method |
| 03/18/1998 | EP0598892B1 Device for setting the filling level in vessel filling machines |
| 03/17/1998 | US5729206 Ground water alert device |
| 03/17/1998 | US5728928 Calibration method for level sensors with pressure transducer |
| 03/17/1998 | US5727421 Apparatus and method for providing leak proof sealing between a metal rod and a plastic housing molded there around |
| 03/12/1998 | WO1998010253A1 Time delayed fluid level monitoring device |
| 03/12/1998 | DE19636422A1 Oil level checking method in internal combustion engine |
| 03/12/1998 | CA2264574A1 Time delayed fluid level monitoring device |
| 03/11/1998 | EP0828141A2 Fuel system low current rheostat |
| 03/11/1998 | EP0828140A1 Level indicator |
| 03/11/1998 | EP0799428A4 An impulse radar with swept range gate |
| 03/11/1998 | CN2276151Y 液位传感器装置 Liquid level sensor device |
| 03/10/1998 | US5726908 Liquid quantity sensor and method |
| 03/10/1998 | US5724822 Determining the amount of working fluid in a refrigeration or heat pump system |
| 03/05/1998 | WO1998009139A1 Resonator sensors employing piezoelectric benders for fluid property sensing |
| 03/05/1998 | DE19650304C1 Device for testing the residual space in packaging |
| 03/05/1998 | CA2262680A1 Resonator sensors employing piezoelectric benders for fluid property sensing |
| 03/04/1998 | CN1174985A Circular grating light guide explosion-proof liquid level meter |
| 03/03/1998 | US5723979 Mixed fluid time domain reflectometry sensors |
| 03/03/1998 | US5723870 Fluid gauging apparatus using magnetostrictive sensor and stick gauge |
| 03/03/1998 | US5722290 Closed-field capacitive liquid level sensor |
| 03/03/1998 | US5722289 Fluid level sensor |
| 02/26/1998 | WO1998007459A2 Inhaler device with means for assessing its depletion level |
| 02/25/1998 | EP0825423A1 Device for measuring and/or monitoring the level of a liquid |
| 02/25/1998 | EP0824671A1 Capacitive level sensor |
| 02/25/1998 | EP0824670A1 Illuminated fluid level indicator |
| 02/25/1998 | EP0740757A4 Chemical refill system for high purity chemicals |
| 02/25/1998 | CN2275233Y Magnetic sensing liquid level meter series products |
| 02/25/1998 | CN2275232Y Medium-free measuring sensor |
| 02/24/1998 | US5721573 Cooldown timing system monitors inkjet cartridge ink levels |
| 02/24/1998 | US5720733 Apparatus for determining and recording injection doses in syringes using electrical capacitance measurements |
| 02/24/1998 | US5720236 Milk meter |
| 02/19/1998 | WO1998007015A1 Method and apparatus for measuring the volume of a medium in a tank |
| 02/19/1998 | DE19632896A1 Trommelgaszähler mit Schrägrohr-Pegelstandsanzeiger Drum gas meter with helical tube water level indicator |
| 02/18/1998 | EP0824072A2 Method and apparatus for detecting fluid level |
| 02/18/1998 | CN2274765Y Level monitor |
| 02/17/1998 | US5719609 Method and apparatus for redundant sealing of a printhead pressure regulator |
| 02/17/1998 | US5719556 Liquid level sensor utilizing AC and resistance |
| 02/17/1998 | US5719342 For monitoring a fluid medium in a container |
| 02/17/1998 | US5719340 Process for determining the phase portion of a fluid medium in open and closed pipes |
| 02/17/1998 | US5719332 Process and system for operating a level sensor |
| 02/17/1998 | US5718146 Waste level detector for vehicle cesspools |
| 02/12/1998 | WO1998006105A1 Fluid level measuring instrument for a nuclear power plant |
| 02/12/1998 | WO1998005931A1 Probe for use in time domain reflectometry |
| 02/11/1998 | EP0823504A2 Pressure chamber with auto-subjection and own connections |
| 02/11/1998 | EP0704049B1 Float-controlled level switch with adjustable switching points |
| 02/11/1998 | CN1173226A An impulse radar with swept range gate |
| 02/11/1998 | CN1173222A Electronic multi-purpose material level sensor |
| 02/10/1998 | US5717383 Device for determining and/or monitoring a predetermined level of contents in a container |
| 02/10/1998 | US5717337 Time-domain reflectometer based measurement system |
| 02/05/1998 | WO1998004939A1 Optical sensor |
| 02/05/1998 | WO1998004890A1 Fuel gauging system for a motor vehicle fuel tank |
| 02/05/1998 | WO1998004889A1 Piezoelectric liquid gauging device |
| 02/05/1998 | WO1998004888A1 Measured value indicator system |
| 02/04/1998 | EP0822392A1 Circuit for ratiometric processing and driving |
| 02/04/1998 | CN2273853Y Device for indicating level of fluent solid material |
| 02/04/1998 | CN2273852Y Two electrode type device for indicating liquid level of accumulator |
| 02/03/1998 | US5714881 Position measurement apparatus using wire waveguide in shock resistant suspension |
| 02/03/1998 | US5713300 Dipstick tube indicator |
| 02/03/1998 | US5713241 Hydraulic system |
| 02/03/1998 | US5713214 Level control machine for producing and dispensing cooled beverages or water-ice |
| 02/03/1998 | US5713213 Refrigeration cycle device having accurate refrigerant deficiency detection capability |
| 01/29/1998 | WO1998003841A1 Capacitive water height gauge and method |
| 01/29/1998 | WO1998003840A1 Microprocessor based apparatus and method for sensing fluid level |