| Patents for G01F 25 - Testing or calibrating of apparatus for measuring volume, volume flow, or liquid level, or for metering by volume (5,338) |
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| 05/15/1990 | US4925096 Apparatus for delivering a liquid |
| 05/03/1990 | WO1990004758A1 Flow meter prover apparatus and method |
| 05/03/1990 | WO1990004757A1 Dynamic leak detector |
| 05/02/1990 | EP0231272B1 Apparatus and method for determining the flow characteristic of a volumetric flowmeter |
| 05/02/1990 | CN2056751U Marking box for combustible gas warner |
| 04/24/1990 | US4918973 Apparatus and method for calibrating a measuring device |
| 04/10/1990 | US4914955 Soapfilm flowmeter device for measuring gas flow rates |
| 03/27/1990 | US4910994 Impulse sensor with calibration means |
| 03/20/1990 | US4910519 Electronic volume correctors |
| 03/14/1990 | EP0358391A1 A device for measuring flow |
| 03/14/1990 | EP0358387A1 A device for measuring flow |
| 03/08/1990 | DE3921004A1 Checking functionability of level indicator or limiter sensor - using injector pump driven by gas or air to feed liquid to sensor under realistic conditions |
| 03/08/1990 | DE3819076A1 Device for counting or dispensing goods |
| 02/13/1990 | US4899588 Method and apparatus for determining elastic constants in tubes |
| 02/13/1990 | US4899582 Air system analyzer |
| 01/30/1990 | US4897797 In a treatment system for pumping a liquid |
| 01/30/1990 | US4896539 For use in determining a flow rate of liquid |
| 01/10/1990 | EP0349673A2 Device for the measurement of the fluid level of a fuel |
| 01/09/1990 | US4891978 Apparatus for measuring the mass of a flowing medium and method for producing an apparatus for measuring the mass of a flowing medium |
| 12/28/1989 | WO1989012804A1 Non-invasive meter calibrating arrangement |
| 12/26/1989 | US4889001 Calibration of fluid delivery equipment |
| 12/14/1989 | WO1989011917A1 Dusting apparatus |
| 12/07/1989 | DE3818523A1 Measuring vessel |
| 11/16/1989 | WO1989010685A1 Device for automatically measuring the quantity of milk extracted by milking installation |
| 11/07/1989 | US4879662 Fluid flow self calibration scheme |
| 10/24/1989 | US4875370 Apparatus for measuring the contents of a tank |
| 10/19/1989 | DE3811946A1 Electrical flowmeter |
| 09/27/1989 | CN2045104U Horizontally translated electric-operated reverser |
| 09/26/1989 | CA1260287A1 Measurement calibration |
| 08/29/1989 | US4860590 Primary standard gas flow calibrator |
| 08/23/1989 | EP0329272A1 Gas meter |
| 08/23/1989 | EP0328762A2 Device to verify the quantity of liquid delivered by a dispenser |
| 08/16/1989 | EP0327958A1 Apparatus for measuring the contents of a tank |
| 08/08/1989 | US4854154 Apparatus and method for determining the flow characteristics of a volumetric flowmeter |
| 08/02/1989 | EP0326380A1 Compensating method and device for instrumental error in rotary displacement flowmeter |
| 07/18/1989 | US4848148 Cyclic motion detection arrangement |
| 07/11/1989 | US4845989 Method and apparatus for determining elastic constants in tubes |
| 07/05/1989 | EP0323205A1 Apparatus for delivering a liquid |
| 06/28/1989 | CN2040247U Random flow checker |
| 06/13/1989 | US4839571 Safety back-up for metering pump control |
| 06/13/1989 | US4838071 Method of determining the filling capacity of and calibrating a pneumatic conveying arrangement |
| 06/06/1989 | US4836016 Method and apparatus for detecting abnormal state in pulse train generating sensor |
| 05/23/1989 | US4832900 Test tool for a reactor vessel fluid level instrumentation |
| 05/23/1989 | US4831866 Automatic meter proving and calibration system |
| 05/17/1989 | EP0315738A2 Automatic meter proving and calibration system |
| 05/17/1989 | CN2037842U Portable in-situ checker for gasometer |
| 05/16/1989 | US4829808 Flow meter prover apparatus and method |
| 05/09/1989 | US4829449 Method and apparatus for measuring and providing corrected gas flow |
| 05/02/1989 | US4827430 Flow measurement system |
| 05/02/1989 | US4826328 Apparatus for measuring the mass of a flowing medium and method for producing an apparatus for measuring the mass of a flowing medium |
| 04/25/1989 | US4823592 Test apparatus for proving the performance of mass flow meters |
| 04/25/1989 | US4823591 Calibration method for exhaust mass flow measuring system |
| 04/20/1989 | WO1989003513A1 Process and apparatus for measurement of a curvature of an annular plate in a pipe |
| 04/18/1989 | US4821557 Method and apparatus for determining the accuracy of a gas flow meter |
| 04/12/1989 | EP0310761A1 Capacitance-type material level indicator |
| 04/11/1989 | US4821022 Float assembly checking system |
| 04/06/1989 | DE3732856A1 Intelligent air quantity meter |
| 04/05/1989 | EP0310298A1 Apparatus and method for determining the amount of material in a tank |
| 04/05/1989 | EP0309644A2 Electronic volume correctors |
| 04/04/1989 | CA1251947A1 Capacitance-type material level indicator |
| 03/08/1989 | EP0306193A1 Fluid meter |
| 03/08/1989 | EP0306110A2 Method for manufacture of a coriolis flow meter |
| 03/08/1989 | CN2033896U Digital display correcting instrument for precise pipette |
| 03/01/1989 | EP0305134A1 Fluid metering system |
| 01/11/1989 | EP0298587A2 Improved flow measurement system |
| 01/10/1989 | CA1248363A1 Method for determining the accuracy of a gas measurement instrument |
| 01/10/1989 | CA1248362A1 Mounting arrangement for a critical flow device |
| 01/05/1989 | DE3820336A1 Method for the determination of the time-related volume flow of a flow medium through a specimen |
| 01/04/1989 | EP0297803A1 Calibration of fluid delivery equipment |
| 01/03/1989 | US4794785 Apparatus for determining the characteristic of a flowmeter |
| 12/28/1988 | EP0296911A1 Electronic testing bench for the rapid calibration of water meters |
| 12/20/1988 | CA1247240A1 Thermoresistive flowmeter element, and method |
| 12/13/1988 | US4790176 Process and device for calibrating a sampling and metering pipette |
| 11/30/1988 | EP0293104A1 Flowmeter |
| 11/17/1988 | EP0290842A2 Method for the determination of the level of fluent material and for calibration of a pneumatic hoisting device |
| 10/26/1988 | EP0288215A2 Determination of electrical capacitance and resistance |
| 09/06/1988 | US4768387 Flowmeter |
| 08/30/1988 | US4766759 Apparatus and method for determining the flow characteristic of a volumetric flowmeter |
| 08/09/1988 | US4762251 Ratio measuring cup |
| 08/09/1988 | US4762012 Universal upstream-downstream flowmeter tester |
| 08/04/1988 | DE3702113A1 Filling level switch and process for adjusting it |
| 08/03/1988 | CN87214686U Volumetric mass flowmeter |
| 07/26/1988 | CA1239546A1 Capacitive gauging method and apparatus |
| 07/13/1988 | EP0273905A1 Improvements in hydrostatic tank gauge systems. |
| 06/29/1988 | EP0272963A1 Sampling and dosing pipette; process and device for its calibration |
| 06/28/1988 | US4753095 Method for determining real gas effects in critical flow nozzles |
| 05/26/1988 | DE3638438A1 Arrangement and method of calibrating flow measuring devices |
| 05/25/1988 | CN87201817U Correcting device for flowmeter with digit display container |
| 04/12/1988 | US4736657 Adjusting tool |
| 03/31/1988 | DE3728829A1 Fluessigkeits-fuellstandsanzeiger Liquid fuellstandsanzeiger |
| 03/15/1988 | US4731730 Universal fuel quantity indicator apparatus |
| 03/08/1988 | US4729247 Universal doppler flowmeter tester |
| 03/08/1988 | US4729236 Automatic orifice calibrator |
| 03/02/1988 | EP0258078A1 Method and device for the verification of fluid counters |
| 02/11/1988 | DE3626594A1 Process for adjusting a potentiometer |
| 02/09/1988 | US4723437 For measuring the flow emitted by the nozzle |
| 01/12/1988 | US4718267 Meter provers |
| 12/29/1987 | US4716536 Measurement calibration |
| 12/29/1987 | CA1230750A1 Compact flow prover |
| 11/25/1987 | EP0246738A1 Liquid level sensing |