165052 ⎘
Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of communicating tubes or reservoirs with movable fluid levels, e.g. by U-tubes
Sub-classes:VARIABLY CHOKED PRESSURE RATE-OF-RISE MASS FLOW VERIFIER
#2NEGATIVE PRESSURE WAVE MONITORING BASED LEAK DETECTION METHOD OF MULTIPATH PIPELINE NETWORK
#3Multi-layer open channel portable flow measuring device based on water impulse principle and flow measuring method
#4MASS FLOW METERS/CONTROLLERS AND METHODS HAVING IMPROVED ACCURACY
#5Carrier for measurement and wafer transfer system including the same
#6Welded differential pressure transducer assembly
#7Coriolis effect-based mass flow meters/controllers using optical sensing and methods having improved accuracy
#8Light irradiation device
#9Gusseted pressure meter
#10Differential pressure based flow measurement device having improved pitot tube configuration
#11Air flow measuring device
#12Pressure compensated flow rate controller with BTU meter
#13GAS FLOW DETECTOR AND POSITIVE AIRWAY PRESSURE APPARATUS CONTAINING THE SAME
#14AIR FLOW MEASURING DEVICE
#15Pressure compensated flow rate controller with BTU meter
#16Apparatus and method for use in measuring fluid flow and pressures
#17Apparatus and method for measuring fluid flow
#18Respiratory flow sensor
#19Modular removable flow metering assembly with cone shaped differential pressure producer in a compact fluid conduit