| 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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| 02/28/1989 | US4807471 Level measurement for storage silos |
| 02/28/1989 | CA1250655A1 Procedure to measure the level of a liquid by means of elastic waves, and device to carry out such procedure |
| 02/28/1989 | CA1250462A1 Fiber optic high and low level alarms |
| 02/22/1989 | EP0303874A1 Device for measuring the quantity of liquid contained in a tank |
| 02/22/1989 | CN2033118U Pulse tachometer machine |
| 02/21/1989 | US4807201 Groundwater pressure measurement |
| 02/21/1989 | US4806902 Fluid level monitor and filler assembly |
| 02/21/1989 | US4806847 Dielectric liquid level sensor and method |
| 02/21/1989 | US4805672 Automatic precision liquid loading control method |
| 02/21/1989 | US4805454 Continuous fluid level detector |
| 02/21/1989 | US4805453 Method of ultrasonic measurement of liquid levels |
| 02/16/1989 | DE3725332A1 Container |
| 02/15/1989 | EP0303221A1 Liquid level indicator using laser beam |
| 02/14/1989 | US4804947 Water sensing apparatus |
| 02/14/1989 | US4804944 Hall effect liquid level sensing apparatus and method |
| 02/14/1989 | US4804936 Liquid selective automatic bilge pump control |
| 02/14/1989 | US4803876 Sight glass for observing lubricant in the lower gearcase of marine engines |
| 02/09/1989 | WO1989001135A1 Sensor and method for detecting levels of conductive liquids |
| 02/08/1989 | EP0302173A1 Method and device for indicating the fluid level in the tank of a motor vehicle |
| 02/08/1989 | CN2032313U Simple low pressure measuring device for level of reservoir |
| 02/08/1989 | CN1030977A Water level sampler |
| 02/07/1989 | US4803427 Precision measuring gauge having sonic delay line with free-standing mode converter armature |
| 02/07/1989 | US4803420 Method of determining the position of the tap on a resistance teletransmitter |
| 02/07/1989 | US4802363 Apparatus and method for measuring liquid depth |
| 02/07/1989 | US4802334 Augmentor fuel system |
| 02/02/1989 | DE3724411A1 Device for continuous measurement of filling levels |
| 02/01/1989 | EP0301534A1 Asymmetrical displacement flowmeter |
| 02/01/1989 | CN2031920U Integrated circuit analog type fluviograph |
| 02/01/1989 | CN2031919U Gamma-ray scintillation type furnace charge level indicator |
| 01/31/1989 | US4801926 Device for sensing the level of a liquid within the interior of a container |
| 01/31/1989 | US4800755 Capacitance-type material level indicator |
| 01/26/1989 | DE3817895A1 Insert-shaped body |
| 01/26/1989 | DE3723646A1 Container with sight-glass |
| 01/25/1989 | EP0300150A1 Device for detecting the presence of slag in a molten-metal jet |
| 01/25/1989 | CN2031513U Two-colour tank gage |
| 01/24/1989 | US4799388 Apparatus and technique for metering liquid flow |
| 01/24/1989 | US4799383 Visual indicator |
| 01/19/1989 | DE3822138A1 Liquid-level monitoring |
| 01/18/1989 | EP0299662A2 Liquid monitoring |
| 01/18/1989 | CN1030479A Differential temp. sensor and instrumentation system incorporating same for detecting presence of water |
| 01/17/1989 | US4799174 Multiple set point condition monitoring systems |
| 01/17/1989 | US4799047 Liquid level detecting and indicating system with coil type measuring device |
| 01/17/1989 | US4798232 Automatic control system for filling beverage containers |
| 01/11/1989 | EP0298529A1 Pressurized magnetic float level indicator for recipients containing liquids at high pressure and temperature |
| 01/10/1989 | US4796966 Magnetically activated fiber optic switch |
| 01/10/1989 | US4796473 Level sensing system |
| 01/10/1989 | US4796472 Level detector with multiple magnetically activated switches |
| 01/10/1989 | US4796471 Techniques useful in determining liquid levels |
| 01/10/1989 | US4796470 Indicating liquid funnel |
| 01/05/1989 | DE3824663A1 Device for continuous level measurement in liquids, by means of a chain of series- or parallel-connected, temperature-dependent resistors, which are heated by an electrical current |
| 01/05/1989 | DE3721213A1 Level measuring device |
| 01/04/1989 | EP0297662A2 System for data transmission |
| 01/04/1989 | CN2030319U Double-colour glass-tube liquidometer |
| 01/04/1989 | CN2030318U Shelled reflection-transmission double-colour liquid level meter |
| 01/04/1989 | CN2030317U Double-colour glass-plate liquidometer |
| 01/03/1989 | US4795967 Level measuring device for electrically non-conductive liquids |
| 01/03/1989 | US4794803 For amplifying a differential signal |
| 01/03/1989 | US4794763 In an air conditioning system |
| 12/29/1988 | WO1988010412A1 Liquid level sensing apparatus |
| 12/29/1988 | DE3822878A1 Top-up reservoir for a pressure medium-actuated dual circuit brake for motor vehicles |
| 12/29/1988 | DE3720473A1 Capacitative level measurement |
| 12/29/1988 | DE3719551A1 Method and device for the determination of the liquid content of at least one container filled partly with liquid and partly with gas |
| 12/28/1988 | EP0296886A2 A liquid level indicating device |
| 12/28/1988 | EP0296660A2 Magnetic level indicator unit with remote transmission |
| 12/28/1988 | EP0296583A2 Filling level measuring device with an ultrasonic transducer |
| 12/28/1988 | CN88211439U 液位探测器 Level detector |
| 12/28/1988 | CN88211429U Double colour water level gage for the purpose of facilitating observation and indication |
| 12/27/1988 | US4794335 Method and apparatus for measuring the thickness of a metal melt adjacent the bottom of a container |
| 12/27/1988 | US4794256 Fast neutron process measurement system |
| 12/27/1988 | US4793178 Method and apparatus for generating data and analyzing the same to determine fluid depth in a well |
| 12/21/1988 | EP0295663A2 Method of detecting remaining quantity of replenishing solution |
| 12/21/1988 | EP0295609A2 Printed circuit windings for screened inductance sensors, especially sensors for level measurement |
| 12/21/1988 | EP0295489A1 Error detection system for two-state fiber optic sensors |
| 12/20/1988 | CA1246941A1 Liquid level sensor assembly |
| 12/15/1988 | WO1988009918A1 Device for position determination of transition zones between at least two different enclosing media |
| 12/15/1988 | DE3718423A1 Device for analysing gas in an internal-combustion engine |
| 12/14/1988 | CN88206545U Liquid level displaying apparatus |
| 12/14/1988 | CN88205845U Single light source reflect and penetrance two colour tank gage |
| 12/14/1988 | CN88202731U Glass plate dual colour liquid level gauge |
| 12/13/1988 | US4791547 Measurement and control system |
| 12/13/1988 | US4791400 Remote control for engine oil level indicator |
| 12/13/1988 | US4791311 Two-terminal multiplexable sensor |
| 12/13/1988 | US4790185 Fuel sender mount |
| 12/13/1988 | US4790184 Oil gauge for cartridge-type oil tank |
| 12/13/1988 | US4790183 Acoustic impedance system for liquid boundary level detection |
| 12/08/1988 | DE3717638A1 Device for determining and indicating the quantity of liquid or solid goods in storage |
| 12/08/1988 | DE3716770A1 Device for the determination of the liquid volume of a liquid in a container with a buoyancy body |
| 12/08/1988 | DE3716538A1 Arrangement for the registration of a liquid level |
| 12/07/1988 | EP0294026A1 Liquid quantity measurement |
| 12/06/1988 | US4789946 System for measuring the level of filling |
| 12/06/1988 | US4789822 Three-electrode sensor for phase comparison and pulse phase adjusting circuit for use with the sensor |
| 12/06/1988 | US4788929 Fluid indicator for refrigeration system |
| 12/06/1988 | US4788861 Apparatus and circuit for monitoring the ink supply and ink printer devices |
| 12/01/1988 | WO1988009484A1 Method and apparatus for measuring the volume of a gas in a container |
| 12/01/1988 | DE3716955A1 Fuellstands-anzeigevorrichtung fuer einen klarspueler-vorratsbehaelter einer geschirrspuelmaschine Box level indicator device for a rinse agent storage containers a dish washer |
| 12/01/1988 | DE3715756A1 Electric signal transmitter, in particular a warning indicator for brake fluid containers |
| 11/30/1988 | EP0198731B1 Ultrasonic-wave transducer to get in contact with a high-temperature wall, and its use |
| 11/30/1988 | CN88210092U Single prism dual-purpose double-color, plane hydrological gage |
| 11/29/1988 | US4788648 Method and system for measurement of a liquid level in a tank |
| 11/29/1988 | US4788506 Measuring probe |