Patents
Sitemap › G01 - Measuring; Testing › G01F - Measuring volume, volume flow, mass flow, or liquid level; Metering by volume › 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
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)
06/1991
06/05/1991EP0429687A1 Improvements relating to installations for measuring liquid depth
06/05/1991EP0429569A1 Container for liquids, with a hydrostatic liquid-level measurement device
06/04/1991US5021665 Oil level monitor
06/04/1991US5020810 Liquid sight monitor with multi-contact insert
06/04/1991US5020492 Warning system for marine propulsion engine
06/04/1991US5020368 Method and system measuring a vertical density profile of a fluid
06/04/1991US5020367 Tank-level gauge
06/04/1991US5020366 Liquid level sensor
05/1991
05/29/1991DE3938742A1 Redundant overfilling protection appts. for dangerous liquids=gases - contains mutually independent electrical control chains, gives manual alarm and performs automatic cut-off probe faults
05/29/1991CN2077986U Magnetic drum red-white two-colour mearsuring liquid level magnetic drum meter
05/28/1991US5019800 System for measuring the oil level of an oil pan of the crankcase of an internal combustion engine
05/28/1991US5018387 Cryogenic liquid level measuring apparatus
05/28/1991US5018237 Dipstick wipe-off tool
05/23/1991DE4035321A1 Level measurement device for liquid container, esp. motor vehicle - has pivoting support and float arms arranged to reduce sensitivity to container shape changes
05/21/1991US5017909 Capacitive liquid level sensor
05/21/1991US5017867 Magnetostrictive linear position detector with reflection termination
05/21/1991US5016569 Automatic milk counter of milking unit
05/21/1991US5016442 Master cylinder with fluid level and pressure failure detector
05/20/1991CA2010863A1 Water level probe
05/16/1991WO1991006833A1 Method and measuring device for determining and monitoring of interface areas in at least two different media
05/15/1991CN2077118U Capacitance type fluid level electrode group for detecting liquid level
05/14/1991US5015995 Fluid level monitor
05/14/1991US5015393 Water treatment for accumulation and removal of floating sludge
05/14/1991US5014445 Transmission fluid fill regulator and seal assembly
05/08/1991EP0426622A1 Device for measuring the relative content of tanks containing fluids possessing different electrical properties
05/08/1991CN2076526U Electronic draught scale for vessel
05/07/1991US5014051 Increased resolution sensor circuit
05/07/1991US5012838 Solenoid valve incorporating liquid surface detecting valve
05/07/1991US5012762 Device for determining the index of individual productivity and feed ration of animals
05/07/1991US5012683 Capacitive liquid interface sensor
05/07/1991US5012589 Displacement servo gauge
05/02/1991EP0425474A1 Portable gas grill
05/02/1991EP0424729A2 Liquid level detection
05/02/1991DE4019436A1 Monitoring supply and level of infusion liq. from patient - applying sensor arrangement responding to liq. with threshold value alarm and connected to evaluation circuit
04/1991
04/30/1991US5012265 For a photographic tripod
04/30/1991US5012227 Warning device for liquid level in dripping bottle
04/30/1991US5010963 Hydraulic drilling machine
04/25/1991DE3934579A1 Liquid level detector for use in containers - uses metal sensor and enclosed by float body having actuating ring for detectors within rod
04/25/1991DE3933474A1 Aus bauelementen zusammensetzbares fuellstandsmessgeraet For devices assembleable level measuring device
04/24/1991CN2075777U Contrast difference type induction liguid level sensitive warner
04/18/1991WO1991005135A1 Phase fraction meter
04/17/1991CN2075335U Electronic display for measuring stored oil
04/16/1991US5008653 Fluid detector with overfill probe
04/16/1991US5008650 Leak damage prevention system
04/16/1991US5007450 Add-on liquid overflow shut-off valve for tank
04/16/1991US5007288 Indicating weight of liquid
04/16/1991US5007287 Filler cap of jar for washer
04/10/1991EP0421770A1 Multi-level fiber-optic liquid level sensing system
04/09/1991US5006834 Liquid level alarm
04/09/1991US5005409 Capacitive liquid sensor
04/09/1991US5005408 Gas weights compensation method for liquid depth gauging system
04/09/1991US5005407 Fluid level sensing system
04/07/1991WO1991005226A1 Level indicator comprising several separable components
04/07/1991CA2026159A1 Multi-level fiber-optic liquid-level sensing system
04/04/1991WO1991004495A1 Temperature-compensated apparatus for monitoring current having reduced sensitivity to supply voltage
04/04/1991DE3931473A1 Vehicle engine dipstick cleaner - uses narrow aperture with flexible lips to wipe oil off dipstick
04/03/1991EP0420421A2 Fuel sensing unit
04/03/1991CN1012308B Anticorrosive electric contact and its manufacture method
04/02/1991US5005005 Fiber optic probe system
04/02/1991US5003823 Noncontact rotating liquid film thickness sensor
04/02/1991CA1282472C Water sensing apparatus
03/1991
03/27/1991EP0419284A1 Fluid level sensor apparatus
03/27/1991EP0419104A2 Method and apparatus for detecting level of molten metal
03/27/1991CN2074012U Liquid level sensor of automobile liquefied gas tank
03/27/1991CN2074011U Oil-off alarm
03/27/1991CN1050263A Double capacity quantitative testing method and apparatus for moisture content
03/26/1991US5001928 Liquid level detecting apparatus
03/26/1991US5001927 Full sensing unit
03/26/1991CA2023594A1 Fuel sensing unit
03/26/1991CA1282159C Method and apparatus for the detection of the fluid level in a tank being filled
03/22/1991WO1991004467A1 Device for determining and/or monitoring a predetermined volume in a container
03/21/1991DE3922164C1 Display glass joint for pipeline - has threaded section for washers for releasable fixing and preventing expansion or deformation from welding
03/20/1991EP0417907A1 Liquid measuring float and float rod assembly
03/20/1991CN2073580U Difference-sensitive material-variation capacity measuring instrument
03/20/1991CN2073579U Quality-indicating scale
03/20/1991CN1050087A Wide-spectrum refraction-transmission type dichromatic level meter
03/19/1991US5001596 Capacitive fluid level sensor
03/19/1991US5000046 Method of measuring a liquid pool volume
03/19/1991US5000044 Fluid level sensor
03/19/1991US4999900 Method for installing product monitoring device in underground storage tanks
03/14/1991DE4028095A1 Operating measurement device for heating lost distributor - rapidly repeating liquid liquid level measurement and comparison with liquid thermal expansion characteristic to determine computation temp.
03/14/1991DE4024110A1 Liquid level detector for container - has non-ferromagnetic float with short circuit winding acting as core in coil
03/14/1991DE3929506A1 Measuring contents of motor vehicle fuel tank - using pressure sensor for gas vol. above fuel level and evaluator
03/13/1991EP0416751A2 Sensing device
03/13/1991EP0416267A1 Arrangement for measuring fluid quantity changes, especially of oil in an internal combustion engine
03/12/1991WO1991004457A1 Compact head, signal enhancing magnetostrictive transducer
03/07/1991WO1991002949A1 Level sensing device
03/07/1991DE3928465A1 Oil level measurer for IC engine - detects position of float using inductive pick=up with core in differential choke
03/06/1991CN2072677U Integrated electric connection point tank gage
03/06/1991CN2072676U Tank gage
03/05/1991US4998022 Monitoring The Level Of Corrosive Liquids
03/05/1991CA1281122C Filling level measuring device for measuring the filling level of explosive or aggressive media in a container
02/1991
02/27/1991EP0413754A1 Level indicator.
02/27/1991CN2072217U High-pressure sealed float type level meter
02/27/1991CN1049559A Explosion-proof liquid level remote measuring, tracing and simulating device
02/26/1991US4996418 Wide range fiber optical displacement sensor
02/26/1991CA1280652C Thermoplastic melting apparatus with a level indicator
02/23/1991WO1991002950A1 Measuring device and process for determining the level in fluid containers, preferably for tank installations, and use of a sound waveguide
02/23/1991CA2065405A1 Measuring device and process for determining the level in fluid containers, preferably for tank installations, and use of a sound waveguide
02/21/1991DE4023800A1 Dipstick to measure oil level in vehicle automatic gearbox - extends through vertically arranged hollow shaft of selector and into gearbox lubricant
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