| 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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| 05/09/1989 | US4827762 System and method for automatically monitoring liquid volume changes in storage tanks |
| 05/09/1989 | CA1253932A1 Liquid level monitoring assemblies |
| 05/05/1989 | WO1989003979A1 Thermoplastic melting apparatus with a level indicator |
| 05/05/1989 | WO1989003978A1 Optical liquid level sensor |
| 05/03/1989 | EP0313790A2 Arrangement for monitoring and testing for leaks, in particular sensitive to liquid leaks |
| 05/03/1989 | EP0313704A1 Device for the measurement of a liquid, in particular of a flammable liquid |
| 05/03/1989 | DE3735905A1 Method and device for volume flow measurement on conveyor belts by means of a laser distance profile scanner |
| 05/03/1989 | CN2037065U Transmission type photoelectric switch for liquid level |
| 05/03/1989 | CN2037064U Contactless orthogonal encoded type telemeter for measuring water level |
| 05/03/1989 | CN1004103B Syrup sensor for dispensing machine |
| 05/02/1989 | US4825695 Liquid level indicator |
| 04/27/1989 | DE3838660A1 Method for the measurement and monitoring of the volume of the displaced liquid in the displacement chamber of a volume change device, taking into account permissible angular deviations of the ground area plane (base) of the displacement chamber from the horizontal |
| 04/27/1989 | DE3733860A1 Thin-film resistor |
| 04/27/1989 | DE3733859A1 Device for fastening a level measuring device in the wall of a container |
| 04/26/1989 | EP0312800A1 Sensor for the determination of the fluid level in a tank |
| 04/26/1989 | EP0312799A1 Device to measure the level of liquid metal in a crystallizer of a continuous casting ingot mould |
| 04/26/1989 | EP0120040B1 Ultrasonic measurement |
| 04/26/1989 | CN1032504A Device for detecting slag in flow of molten metal |
| 04/25/1989 | US4825383 Process and device for measuring the level of the free surface of a liquid |
| 04/20/1989 | DE3738792A1 Method for indicating the filling quantity of filling goods in a container and indicating device for the filling quantity |
| 04/20/1989 | DE3733761A1 Method and device for indicating precipitated layers in separators |
| 04/19/1989 | EP0311661A1 Sensor apparatus |
| 04/18/1989 | US4822996 Use in a refrigeration device |
| 04/18/1989 | US4821922 Converting solid to molten thermoplastic material |
| 04/18/1989 | US4821571 Damping device and a device for measuring the level of fuel in a motor vehicle fuel tank including such a damping device |
| 04/18/1989 | US4821570 Apparatus for measuring the level of a liquid, in particular a flammable liquid |
| 04/18/1989 | US4821569 Parasitic echo pulse rejector for ultrasonic liquid level meter |
| 04/12/1989 | EP0310983A1 Level measurement of liquid metal in containers filled permanently with liquid metal for level adjustment |
| 04/12/1989 | EP0310761A1 Capacitance-type material level indicator |
| 04/12/1989 | EP0310748A1 Device for detecting the filling level in liquid containers |
| 04/12/1989 | EP0310615A1 Optical sensor |
| 04/12/1989 | CN2035872U Photoelectric measuring device for liquid level |
| 04/11/1989 | US4821215 Monitoring equipment for adverse environments |
| 04/11/1989 | US4821022 Float assembly checking system |
| 04/11/1989 | US4820973 Impedance measuring system |
| 04/11/1989 | US4819484 Portable liquid level gauge |
| 04/11/1989 | US4819483 Level indicator control system for use with capacitance probes in tanks containing substances |
| 04/11/1989 | CA1252542A1 Automotive dashboard gauge |
| 04/11/1989 | CA1252541A1 Wettable devices operational with aqueous liquids |
| 04/06/1989 | WO1989003022A1 Level indicator |
| 04/06/1989 | WO1989003021A1 Heat-sensitive fuel quantity detector |
| 04/05/1989 | EP0310564A1 Filling quantity measuring device |
| 04/05/1989 | EP0310467A1 Measuring devices comprising rheostat-type transducers |
| 04/05/1989 | EP0310298A1 Apparatus and method for determining the amount of material in a tank |
| 04/05/1989 | EP0310279A2 Two-terminal multiplexable sensor |
| 04/05/1989 | EP0309890A1 Use of the electromagnetic ultrasound transformation process in monitoring the filling level and formation of bubbles in enclosures containing a fluid |
| 04/05/1989 | CN2035464U Lump material position signalling apparatus |
| 04/05/1989 | CN1032235A Anticorrosive electric contact and its manufacture method |
| 04/04/1989 | US4818976 Device for monitoring hydrocarbons in groundwater |
| 04/04/1989 | US4818492 Capacitive liquid level sensor for automatic chemical analyzer |
| 04/04/1989 | US4817689 Automatic control system for filling beverage containers |
| 04/04/1989 | US4817439 Process and apparatus for measuring two phase flow |
| 04/04/1989 | CA1252009A1 Contents gage |
| 04/04/1989 | CA1251949A1 Fluid level measurement |
| 04/04/1989 | CA1251945A1 Apparatus for monitoring burden distribution in furnace |
| 03/29/1989 | EP0308796A1 Device for inspecting the level in a writing-liquid container for recording apparatuses |
| 03/29/1989 | CN2035077U Dual-colour quartz glass tube type water level meter |
| 03/28/1989 | US4816799 Resistive material level sensor |
| 03/28/1989 | US4816695 Optical fluid detector |
| 03/28/1989 | US4815323 Ultrasonic fuel quantity gauging system |
| 03/28/1989 | CA1251842A1 Liquid supply reservoir |
| 03/23/1989 | WO1989002583A1 Level indicator for cryogenic fluids |
| 03/22/1989 | EP0307930A2 Level measurement for storage silos |
| 03/22/1989 | EP0168469B1 Fuel meter for vehicles |
| 03/22/1989 | CN2034685U Portable measurer for water level and water fiffer |
| 03/21/1989 | US4814752 Overflow water containment pedestal with high level sensor and shutoff |
| 03/21/1989 | US4813759 Fiber optic high and low level alarms |
| 03/21/1989 | US4813285 Apparatus for establishing a clean interface in a leak detector |
| 03/21/1989 | US4813284 Method for establishing a clean interface in a leak detector in an above ground storage tank |
| 03/21/1989 | US4813282 Vehicle fuel level sensor |
| 03/21/1989 | US4813277 Method for collecting magnetizable particles in an above ground storage tank |
| 03/21/1989 | US4813275 Leak detection method and device |
| 03/21/1989 | US4813269 Magnetic interface contaminant collector for leak detector in above ground tank |
| 03/16/1989 | DE3729242A1 Method for measuring the level of a liquid in a vessel |
| 03/15/1989 | EP0307042A1 A machine for spreading material |
| 03/15/1989 | CN2034271U Multipurpose oil storehouse water surveying instrument |
| 03/15/1989 | CN2034236U Water-level remote-monitoring peeping glass for industrial boiler |
| 03/14/1989 | US4811601 Method and apparatus for measuring the change in volume with change in temperature of liquid in tanks |
| 03/14/1989 | US4811596 Arrangement for tank content measurement of an operating-medium tank of a vehicle |
| 03/14/1989 | US4811595 System for monitoring fluent material within a container |
| 03/08/1989 | EP0112884B1 Flow monitoring apparatus |
| 03/08/1989 | CN2033895U Non-cotact type multi-function remote sensing dual colour tank gage |
| 03/07/1989 | US4811160 Capacitance-type material level probe |
| 03/07/1989 | US4810988 Slag detector transducer coil assembly |
| 03/07/1989 | US4810953 Electronic interface device between a sensor and a display unit |
| 03/07/1989 | US4809551 Device for detecting the liquid level in a tank, particularly a lighter tank and tank provided with such device |
| 03/07/1989 | US4809550 Digital diving meter |
| 03/02/1989 | DE3728042A1 Filling-level indicator for closable containers |
| 03/02/1989 | DE3721546A1 Device for determining and indicating the quantity of liquid or solid goods in storage |
| 03/01/1989 | EP0304939A2 Optical part including integral combination of optical fiber and light emitting or receiving element and method of manufacturing the same |
| 03/01/1989 | CN2033501U Optical liber liquid level telegauge |
| 03/01/1989 | CN2033500U Liquid level transmitter with a floating ball therein |
| 03/01/1989 | CN2033499U Water level monitor |
| 03/01/1989 | CN2033498U High sensitivity liquid gasometer for family |
| 03/01/1989 | CN2033497U Dual-reflection, transmission type dual-colour liquidometer |
| 02/28/1989 | US4809129 Liquid level control system for refrigeration apparatus |
| 02/28/1989 | US4807672 Empty-full indicator for solids tanks and blenders |
| 02/28/1989 | US4807474 Sight glass assembly |
| 02/28/1989 | US4807473 Thermoplastic sight monitor |
| 02/28/1989 | US4807472 Motorcycle fuel level gauge |