| 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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| 10/09/1991 | EP0324733B1 A moisture indicator |
| 10/08/1991 | US5056049 Position Transmitter |
| 10/08/1991 | US5054319 Liquid level sensor and method |
| 10/08/1991 | US5054318 Resonance frequency liquid level sensor |
| 10/03/1991 | WO1991014932A1 Sampling device |
| 10/03/1991 | WO1991014926A1 Device for measuring the liquid level in a container, in particular in the fuel tank of a vehicle |
| 10/03/1991 | WO1991014639A1 Process for quantity-related disposal of household and industrial refuse and quantity-related disposal system for said refuse |
| 10/03/1991 | WO1991013323A3 Fiber optic fuel and liquid gauge |
| 10/03/1991 | CA2018088A1 Electronic gauge system |
| 10/02/1991 | EP0449596A2 Distance measuring method and apparatus therefor |
| 10/02/1991 | EP0449590A2 In-furnace slag level measuring apparatus |
| 10/02/1991 | EP0449112A1 Liquid level sensing device for steam boilers |
| 10/02/1991 | EP0449023A1 Device for determining and/or monitoring a predetermined filling level in a container |
| 10/02/1991 | EP0448892A2 Oil level detector for automotive vehicle engine sump |
| 10/02/1991 | DE4010483A1 Liquid level-density measurement arrangement - has orifice plate between liquid surface and force transmission unit with hole for rod covered by movable seal |
| 10/02/1991 | DE4010065A1 Verfahren zum mengenbezogenen entsorgen von haushalts-und gewerbemuell und mengenbezogenes entsorgungssysstem fuer derartigen muell A method for volume-based dispose of household and gewerbemuell and volume-related entsorgungssysstem for such trash |
| 10/02/1991 | CN2085955U 液位传感器 Level Sensors |
| 10/02/1991 | CN2085954U Alarm for suddenly losing water in hot-water heating system |
| 10/02/1991 | CN1055057A Movable liquid tank calibrating device |
| 10/01/1991 | US5053751 Water alarm to signal flooding in basements |
| 10/01/1991 | US5053745 Apparatus for warning of engine oil abnormality |
| 10/01/1991 | US5052224 Shielded sight gauge for storage tanks |
| 10/01/1991 | US5052223 Apparatus including a capacitive probe for measuring the level and/or the volume of a liquid |
| 10/01/1991 | US5052222 Multiple-unit water depth sensor system |
| 10/01/1991 | CA2039451A1 Dipstick locator |
| 10/01/1991 | CA2038825A1 In-furnace slag level measuring apparatus |
| 10/01/1991 | CA2038823A1 In-furnace slag level measuring method and apparatus therefor |
| 10/01/1991 | CA2038818A1 Distance measuring method and apparatus therefor |
| 10/01/1991 | CA1290043C Liquid level sensing and control |
| 09/26/1991 | DE4030401A1 Vorrichtung zum messen des fluessigkeitsstandes in einem behaelter, insbesondere im kraftstofftank eines fahrzeugs Apparatus for measuring the fluessigkeitsstandes in a container, especially in the fuel tank of a vehicle |
| 09/25/1991 | EP0448487A1 Liquid level control device |
| 09/25/1991 | EP0447810A2 Measuring device for filling level or other mechanical properties of electrically conductive liquid |
| 09/25/1991 | EP0447728A2 Optical device for liquid level measurement in a reservoir, using a reflective prism |
| 09/25/1991 | EP0356505A4 Magnetic position sensor |
| 09/25/1991 | CN2085519U Slide resistance type magnetic tracking liquid level transducer |
| 09/25/1991 | CN1014092B Procedure to measure the level of a liquid by means of elastic waves, and device to carry out such procedure |
| 09/24/1991 | US5051921 Method and apparatus for detecting liquid composition and actual liquid level |
| 09/24/1991 | US5050433 Electronic circuit for fuel level sensor |
| 09/24/1991 | US5050432 Tank gauge |
| 09/24/1991 | US5050431 Liquid level sensing device and methods of making an operating the same |
| 09/24/1991 | US5050430 Magnetostrictive linear position detector with temperature sensors |
| 09/24/1991 | CA1289643C Magnetostrictive linear displacement transducer |
| 09/24/1991 | CA1289383C Sight glass assembly |
| 09/19/1991 | WO1991014130A1 Improvements in liquefied gas dispensing |
| 09/19/1991 | CA2077688A1 Liquefied gas dispensing |
| 09/18/1991 | EP0446418A1 Level indicator |
| 09/18/1991 | EP0446417A1 Liquid quantity measuring system |
| 09/18/1991 | CN2085059U Megnetic antiseptic liquid level meter |
| 09/18/1991 | CN1013996B Level measuring meter for non-conducting fluid |
| 09/17/1991 | US5049878 Two-wire compensated level measuring instrument |
| 09/17/1991 | US5049826 Liquid level sensing apparatus for use in automatic chemical analysis |
| 09/17/1991 | US5049825 System and method of error reduction for differential capacitive transducers |
| 09/17/1991 | US5048335 Capacitance-type material level indicator |
| 09/17/1991 | US5048334 Method and apparatus for subterranean liquid level measurement |
| 09/17/1991 | US5048333 Material level checking apparatus for use in a rotating member |
| 09/14/1991 | CA2029016A1 Steam infusion float |
| 09/12/1991 | DE4040332A1 Liquid electrolytic conductivity measurement - has multiplexer which selects precision resistances for measurement of alternating current between stray field measurement electrodes |
| 09/12/1991 | DE4036262A1 Electrical measuring appts. for level of conductive liq. - uses measuring sensor and evaluating circuit for continuous measurement of level in container or other mechanical data |
| 09/11/1991 | EP0445480A2 Device for measuring or monitoring differences in level between several points |
| 09/11/1991 | CN2084610U Capacity water level measuring sensor |
| 09/10/1991 | US5047124 Apparatus for feeding gas into a saline solution |
| 09/10/1991 | US5046583 Oil level sensor for an internal combustion engine |
| 09/10/1991 | US5046263 Oil level monitoring device for automotive automatic power transmission |
| 09/10/1991 | US5046214 Spool construction and oil dipstick wiper including such construction |
| 09/05/1991 | WO1991013323A2 Fiber optic fuel and liquid gauge |
| 09/05/1991 | WO1991013322A1 An apparatus for determining the level of liquid in a container |
| 09/05/1991 | DE4013507A1 Liq. container esp. for spirit lever - has phototransmitter and photoreceiver producing signal evaluated to determine container position w.r.t. vertical or horizontal |
| 09/05/1991 | DE4011112A1 Oil level measuring arrangement for IC engine sump esp. of motor car - has measurement cell in centre of sump floor or probe protruding into oil from above and connected to indicator |
| 09/05/1991 | DE4006567A1 Continuous measuring appts. for liq. level in container - measures pressure differential between electrically non-conductive liq. and gas space above |
| 09/05/1991 | CA2011482A1 Sewer alarm |
| 09/04/1991 | EP0444834A2 In furnace- level meter and antenna therefor |
| 09/04/1991 | EP0444173A1 Device for determining and/or monitoring a predetermined volume in a container. |
| 09/04/1991 | CN2084191U Film vibrating damping type level indicator |
| 09/04/1991 | CN1054318A In-furnace level meter and antenna therefor |
| 09/03/1991 | US5045692 Simultaneous fluid flow and fluid density measurements using rotameter and nuclear technology |
| 09/03/1991 | US5045691 Opto-electronic system for measuring and displaying rotary movement |
| 09/03/1991 | US5045286 Injection nozzle |
| 09/03/1991 | US5044764 Method and apparatus for fluid state determination |
| 09/03/1991 | US5044723 Tapered fibre sensor |
| 09/03/1991 | US5044509 Infant nursing bottle and luminescent indicator |
| 09/03/1991 | US5044168 Apparatus and method for low refrigerant detection |
| 09/03/1991 | CA2037397A1 Electronic fluid level indicator |
| 09/03/1991 | CA2037396A1 Electromechanical fluid level indicator |
| 09/02/1991 | CA2036752A1 Solenoid actuator having a magnetic flux sensor |
| 08/29/1991 | WO1991013324A1 Liquid level detecting apparatus and liquid level detecting method |
| 08/29/1991 | CA2053925A1 Liquid level detection apparatus and method thereof |
| 08/28/1991 | EP0443245A2 Ink jet recording apparatus |
| 08/28/1991 | CN2083745U Temp.-controlled glass tube liquid level electrode |
| 08/28/1991 | CN1013708B Water level detector of fully automatic washer |
| 08/27/1991 | US5043912 Apparatus for measuring the level of the interface between a first and a second medium in a reservoir |
| 08/27/1991 | US5043707 Level indicator for liquid reservoirs |
| 08/27/1991 | US5042689 Bottled water cooler having vent on demand delivery system |
| 08/27/1991 | US5042300 Liquid level sensor |
| 08/27/1991 | US5042299 Capacitive fluid level sensor |
| 08/27/1991 | US5042298 Filling-level indicator |
| 08/27/1991 | US5042167 Oil dipstick guide |
| 08/27/1991 | CA2036779A1 In-furnace level meter and antenna therefor |
| 08/27/1991 | CA1288151C Sensor and method for ullage level and flow detection |
| 08/24/1991 | CA2034607A1 Fiber optic fuel and liquid gauge |
| 08/22/1991 | DE4021829A1 Optical limit warning device for detecting dyke levels - has light barrier with interrupter moved by external actuator |