| 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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| 02/28/1990 | EP0355902A2 Plotter pen ink level detector |
| 02/28/1990 | EP0355791A2 Analytical equipment with function of detecting liquid surface |
| 02/28/1990 | EP0355643A2 Process for sensing the flooding of a surface |
| 02/28/1990 | EP0355474A1 Oil filling device with an oil filler tube and an oil dip stick |
| 02/28/1990 | EP0355134A1 Optical fluid level sensor |
| 02/28/1990 | EP0355118A1 Visual indicator |
| 02/28/1990 | CN2053749U Magnetic dry-reed pipe type liquid level sensor |
| 02/28/1990 | CN2053748U Full visual angle bichromatic liquid level gage |
| 02/27/1990 | US4904878 Multi-point refractive liquid level sensor |
| 02/27/1990 | US4903935 For fluid control systems |
| 02/27/1990 | US4903530 Liquid level sensing system |
| 02/22/1990 | WO1990001682A1 Optical liquid level sensors |
| 02/22/1990 | DE3827744A1 Method for the production of an equipment for monitoring the liquid level in a container and an equipment produced by this method |
| 02/21/1990 | EP0355038A1 Apparatus for measuring the level of the interface between a first and a second medium in a reservoir |
| 02/21/1990 | CN2053332U Metering gauge for liquefied petroleum gas |
| 02/21/1990 | CN2053331U Liquid level tester by metallic detection |
| 02/21/1990 | CN2053330U Physical position gauge |
| 02/20/1990 | US4902962 Detection of the surface of a liquid or foam including moisture inhibiting |
| 02/20/1990 | US4901776 Funnel with fill indicator |
| 02/15/1990 | DE3826101A1 Apparatus for the mechanical stimulation of a flowable material in a container by means of ultrasound, with monitoring of the filling level of the material in the container |
| 02/14/1990 | CN2052893U Optical fibre metering device for oil tank content |
| 02/13/1990 | US4901245 Nonintrusive acoustic liquid level sensor |
| 02/13/1990 | US4900921 System and method for opto-acoustic liquid quantity measurement and transducer therefor |
| 02/13/1990 | US4899994 Device for monitoring the level of molten metal in a converter |
| 02/13/1990 | US4899585 Liquid level detector and method for a vapor deposition container |
| 02/13/1990 | US4899584 Fluidic amplifier for sensing fluid motion |
| 02/08/1990 | WO1990001146A1 Asymmetrical displacement flowmeter |
| 02/07/1990 | CN2052529U Multi-stage anticorrosion seal type sensor of liquid-level |
| 02/07/1990 | CN2052528U Fluviograph with double colour quartz glass tube |
| 02/07/1990 | CN2052527U Double colour fluviograph |
| 02/06/1990 | US4898217 Device for metering the mass of natural gas for fueling motor vehicles |
| 02/06/1990 | US4898030 Propellant remaining gaging system |
| 02/01/1990 | DE3825630A1 Method for the determination and indication of the supply quantity of motor vehicle operational liquids contained in a supply container |
| 02/01/1990 | DE3825263A1 Device for monitoring high-tension network devices |
| 01/31/1990 | EP0352497A2 Electrodes for level measurement in milk flowmeters |
| 01/30/1990 | US4897244 Transfrer probe causes signal when contacting fluid; noncontamination |
| 01/30/1990 | US4896542 Portable wastewater flow meter |
| 01/30/1990 | US4896536 Oscillation unit for filling level vibration limit switch |
| 01/30/1990 | US4896535 Tank level meter |
| 01/30/1990 | US4896393 Dip-stick wiper with built-in oil detainer |
| 01/25/1990 | WO1990000726A1 Level indicator |
| 01/25/1990 | WO1990000725A1 Level indicator |
| 01/25/1990 | DE3918685A1 Oil dipstick - funnel with wiper device |
| 01/24/1990 | EP0351700A2 Arrangement for the capacitive fluid level measurement |
| 01/24/1990 | CN1039110A Rf determination method of metallic liquid level and its equipment |
| 01/23/1990 | US4896052 Overflow and leakage detection system for an air conditioning unit |
| 01/23/1990 | US4894926 Dipstick guide |
| 01/17/1990 | CN1038880A Instrumentation and monitoring systems employing differential temperature sensors |
| 01/16/1990 | US4893507 Device to measure the level of liquid metal in a crystallizer of a continuous casting ingot mould |
| 01/11/1990 | DE3822994A1 Fuellstandsanzeiger Fuellstandsanzeiger |
| 01/11/1990 | DE3822799A1 Measuring equipment for the determination of the level, especially the maximum level of a container |
| 01/11/1990 | DE3822705A1 Method for the measurement of the bath level of a metal bath in a container |
| 01/10/1990 | EP0350185A2 Fuel tank float |
| 01/10/1990 | EP0350074A2 Method and apparatus for measuring the content of a storage vessel |
| 01/10/1990 | EP0349673A2 Device for the measurement of the fluid level of a fuel |
| 01/10/1990 | EP0349528A1 A method and measuring system for contactless measuring the values of magnitudes relating to electrically conductive materials. |
| 01/10/1990 | CN2050969U Combination flat inclined light reflecting double colour tank gage |
| 01/10/1990 | CN2050968U Continuous double colour glass plate tank gage |
| 01/09/1990 | US4891980 Liquid level gauge |
| 01/09/1990 | US4891859 Wiper to remove liquid film deposited on a dip stick |
| 01/08/1990 | EP0288514A4 Fiber optic sensor apparatus. |
| 01/03/1990 | CN2050592U Tank gage |
| 01/03/1990 | CN2050591U Downward fluid level pressure sensor |
| 01/02/1990 | US4890651 Ultrasonic automatic cup filling method operating adjacent valves on different A.C. half cycles |
| 01/02/1990 | US4890493 Automatic tank reading gauge |
| 01/02/1990 | US4890492 Differential pressure level sensor with temperature sensing elements |
| 01/02/1990 | US4890491 Method and device for indicating the level of liquid in an automobile fuel tank |
| 01/02/1990 | US4890490 Liquid level monitoring |
| 12/28/1989 | DE3348119C2 Device for ascertaining and/or monitoring a predetermined filling level in a container |
| 12/27/1989 | EP0348109A2 Slag detector transducer coil assembly |
| 12/27/1989 | CN2050158U Self-adjoint heat glass plate tank gage |
| 12/26/1989 | US4890266 Acoustic range finding system |
| 12/26/1989 | US4889442 Writing instrument with ink quantity of level detecting function |
| 12/26/1989 | US4888990 Sight glass apparatus |
| 12/26/1989 | US4888989 Level sensor system |
| 12/26/1989 | US4888987 High sensitivity measurement device for measuring various parameters of non-electric quantity |
| 12/26/1989 | US4888978 Instrument to measure leakage of steam from a steam trap |
| 12/20/1989 | EP0347095A1 Optical liquid-level sensing means |
| 12/19/1989 | US4888576 Method and system for detecting the level of engine oil of an engine |
| 12/19/1989 | US4887798 Device for detecting slag flowing with molten metal through an outlet opening in a metallurgical vessel |
| 12/13/1989 | CN2049349U Magnetic coupling liquid-level indicating and alarm device for float tackle |
| 12/13/1989 | CN1037938A Fully automatic washer |
| 12/12/1989 | US4885931 System for detecting leaks in underground fuel tanks and the like |
| 12/07/1989 | DE3818580A1 Light-liquid trap |
| 12/07/1989 | DE3818419A1 Filling apparatus for liquid substances |
| 12/06/1989 | EP0344337A1 Level indicator for liquids |
| 12/05/1989 | US4884444 Motor-driven material level indicator |
| 11/29/1989 | EP0343403A1 Circuit for the self-excitation of a mechanical oscillation system to its characteristic resonant frequency |
| 11/29/1989 | CN2048576U Double function interface meter |
| 11/28/1989 | US4883200 Thermoplastic melting apparatus with a level indicator |
| 11/28/1989 | US4883100 Automatic control system for filling beverage containers |
| 11/28/1989 | US4882929 Apparatus and process for measuring changes in effect of tidal forces |
| 11/28/1989 | CA1263255A1 Tank leakage detector |
| 11/21/1989 | US4881487 Fluid level sensing method and apparatus |
| 11/21/1989 | US4881486 Remote indicating dip stick |
| 11/16/1989 | WO1989011022A1 Hydraulic drilling machine |
| 11/16/1989 | WO1989010802A1 Circuitry for self-excitation of self-resonant vibrations in a mechanical vibrating system |
| 11/16/1989 | WO1989010688A1 Method and device for determining the quantity of milk extracted from one cow |
| 11/16/1989 | WO1989010687A1 Device for determining the index of productivity and food ration of animals |
| 11/16/1989 | WO1989010686A1 Automatic milk counter for milking installation |