| 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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| 08/23/1988 | CA1240852A1 Device for sampling and measuring the flow of a liquid under constant or pulsed circulation conditions |
| 08/18/1988 | DE3703658A1 Device for determining the level of a liquid in a container, in particular in a motor vehicle |
| 08/18/1988 | DE3703629A1 Fluid level indicator |
| 08/17/1988 | EP0278678A2 Method and apparatus for storage tank leak detection having temperature compensation |
| 08/17/1988 | EP0278123A2 Fiber optic structure |
| 08/17/1988 | EP0278010A1 Combined apparatus for the long-term care of different kinds of plants |
| 08/16/1988 | US4764671 Fiber optic fluid sensor using coated sensor tip |
| 08/16/1988 | US4763813 Oil metering apparatus |
| 08/16/1988 | US4763518 Method for measuring net internal volume of a receptacle containing an unknown volume of residual liquid |
| 08/16/1988 | CA1240755A1 Empty container detector with drop sensor |
| 08/10/1988 | EP0277179A1 Automatically adjustable weir and environmentally protected sensor |
| 08/10/1988 | CN87216701U Magnetic float type fluid level meter |
| 08/10/1988 | CN87203453U Weight-balanced lever type level meter |
| 08/09/1988 | US4762992 Error detection system for two-state fiber optic sensors |
| 08/09/1988 | US4762000 Fluid level indicating apparatus |
| 08/09/1988 | US4761886 Dipstick for measuring oil or fluid levels |
| 08/04/1988 | DE3702113A1 Filling level switch and process for adjusting it |
| 08/03/1988 | CN88210171U Magnetic short circuit type liquid level measuring device |
| 08/03/1988 | CN87214675U Liquid level pressure sensor with temp. compensation |
| 08/02/1988 | US4761638 Means and method for detecting presence of electrically conductive fluid |
| 08/02/1988 | US4760736 On board indicator for motor vehicles |
| 07/28/1988 | DE3737658A1 Apparatus for measuring the tank content of an operational liquid tank on a motor vehicle |
| 07/28/1988 | DE3700832A1 Sensor for monitoring levels of fluids with the aid of a fibre-optic waveguide |
| 07/27/1988 | CN87215045U Liquid level measuring and controlling device |
| 07/26/1988 | CA1239546A1 Capacitive gauging method and apparatus |
| 07/25/1988 | EP0277179A4 Automatically adjustable weir and environmentally protected sensor. |
| 07/20/1988 | EP0275240A2 A method for determining and indicating the volume of fuel in the tank of a motor vehicle |
| 07/20/1988 | EP0275229A1 Method and device for automatically detecting and measuring the position of the forms or nuances of an image produced by a video camera |
| 07/20/1988 | EP0274772A2 Fiber optic structure |
| 07/20/1988 | EP0274771A2 Liquid level sensor |
| 07/20/1988 | EP0274767A1 Method and circuit for determining the pick-off position of a remotely controlled resistance transmitter |
| 07/20/1988 | CN87210475U Dual-colour liquid-level meter with colour illumination |
| 07/19/1988 | US4758700 Switch construction employing contact having spaced-apart contact points |
| 07/19/1988 | US4757710 Sight glass for observing lubricant in the lower gearcase of marine engines |
| 07/13/1988 | EP0274091A2 Optical displacement sensor |
| 07/13/1988 | CN87203326U Non-contact type hopper level indicator |
| 07/12/1988 | US4757305 Water level indicator |
| 07/12/1988 | US4756076 Method for making a resistive level sensor |
| 07/06/1988 | EP0273128A1 Method for detecting a liquid surface and the equipment |
| 07/06/1988 | CN87204658U Simple water-level remote measuring instrument |
| 07/06/1988 | CN86101109B Photoelectric liquid-levle instrument |
| 07/05/1988 | US4755677 For determining the quanity |
| 07/05/1988 | US4754732 Low oil sensor for an internal combustion engine |
| 07/05/1988 | CA1238836A1 Fluidic level control system |
| 06/30/1988 | DE3642836A1 Galvanic sensing probe |
| 06/29/1988 | CN87213036U Fyk-model level control |
| 06/29/1988 | CN87210163U Metering and closing type fuel-gas warner |
| 06/28/1988 | US4753117 Method for displaying information to a diver |
| 06/28/1988 | CA1238503A1 Device for the electro-magnetic measuring of the filling level of metallurgical vessels |
| 06/23/1988 | EP0232263A4 Monitor for liquid level and urine flow. |
| 06/23/1988 | DE3642406A1 Electronic monitoring and control device for filling safety means |
| 06/22/1988 | EP0272180A2 Level indicator for fluid reservoir |
| 06/22/1988 | EP0271792A2 Low level detector |
| 06/22/1988 | CN87209272U Differential liquid level sensor with thermoelement string |
| 06/22/1988 | CN87206539U Magneto-optical monitor for liquid level |
| 06/21/1988 | US4752899 Condition monitoring system for locomotives |
| 06/21/1988 | US4752019 Combined dispensing head and level gauge |
| 06/21/1988 | US4751845 Dipstick assembly |
| 06/15/1988 | EP0270923A1 Apparatus and method for automatically filling a container with a liquid |
| 06/15/1988 | CN87209380U Optical fibre sensitive tank gauge |
| 06/15/1988 | CN87209188U Electronic double-colour hydrological gauge |
| 06/14/1988 | CA1238110A1 Method and arrangement for signal transmission in ultrasonic echo sounding systems |
| 06/14/1988 | CA1238109A1 Sonic and ultrasonic distance measuring device |
| 06/09/1988 | DE3640444A1 Device for detecting the filling level in a container |
| 06/09/1988 | DE3640443A1 Device for detecting the filling level in a container |
| 06/08/1988 | EP0270204A1 Method and apparatus for monitoring a liquid level |
| 06/07/1988 | US4749988 Non-invasive liquid level sensor |
| 06/07/1988 | US4749273 Method and apparatus for determining the material flow rate of conveying mechanisms |
| 06/07/1988 | US4748846 For determining the amount of liquid in a tank |
| 06/02/1988 | WO1988004031A1 Volumetric leak detection system for underground storage tanks and the like |
| 06/01/1988 | CN87213956U Water-level automatic controller with time-delay control device |
| 06/01/1988 | CN87210686U Twin tooth type bicolored fluviograph |
| 06/01/1988 | CN86107944A Float-type fluviograph |
| 06/01/1988 | CN86107738A Time-sharing multifunction sensing technique |
| 05/31/1988 | US4748300 Liquid level indicator switch |
| 05/31/1988 | US4748299 Level sensing system with latching device |
| 05/31/1988 | CA1237504A1 Fluid level indicator |
| 05/26/1988 | DE3639455A1 Method with the associated devices for fully electronic level measurement of liquids and gases with the aid of flexible and flat, pressure-absorbing sensors with the periphery in the tank |
| 05/25/1988 | EP0268207A2 High sensitivity measurement device for measuring various parameters of non-electric quantity |
| 05/25/1988 | CN87209303U Double colour liquid level meter |
| 05/24/1988 | US4747062 Method and apparatus for detecting the level of a liquid in a tank |
| 05/24/1988 | US4745895 Liquid monitoring apparatus |
| 05/24/1988 | US4745893 Use with internal combustion engines |
| 05/24/1988 | US4745880 Milkmeter for determining the weight of the quantity of milk issued by a cow during milking |
| 05/24/1988 | US4745806 Superconductive alloys |
| 05/24/1988 | CA1236993A1 Fluid level measurement system |
| 05/19/1988 | DE3734608A1 Sensitive composite film and process for the production thereof |
| 05/18/1988 | CN87212150U Point contacting alarming float meter |
| 05/17/1988 | US4745293 Method and apparatus for optically measuring fluid levels |
| 05/17/1988 | US4744808 Magnet |
| 05/17/1988 | US4744395 Device for detecting the filling level of a liquid in a container |
| 05/17/1988 | US4744247 Device for electrical measurement of the level of a liquid in a fuel tank |
| 05/11/1988 | CN87203470U Two-coloor liquid level indicator |
| 05/10/1988 | US4744040 Distance measurement method making use of electromagnetic wave and system therefor |
| 05/10/1988 | CA1236573A1 Data entry systems |
| 05/04/1988 | CN87203095U Multifunctional auto-monitoring device for oil depot |
| 05/04/1988 | CN86102512A Acoustic method and its equipment for detecting the location of cumulative water in pipelines |
| 05/03/1988 | US4742244 For monitoring fluid volume in a vessel or storage tank |
| 05/03/1988 | US4741209 Apparatus for detecting the boundary between two substances |
| 05/03/1988 | CA1236209A1 Acoustic waveguide monitoring |