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2. Custody transfer - Wikipedia

   en.wikipedia.org/wiki/Custody_transfer

   Custody transfer of liquid flow measurement follow guidelines set by the ISO. By industrial consensus, liquid flow measurement is defined as having an overall uncertainty of ±0.25% or better. The overall uncertainty is derived from an appropriate statistical combination of the component uncertainties in the measurement system.

3. Gas meter - Wikipedia

   en.wikipedia.org/wiki/Gas_meter

   A gas meter is a specialized flow meter, used to measure the volume of fuel gases such as natural gas and liquefied petroleum gas. Gas meters are used at residential, commercial, and industrial buildings that consume fuel gas supplied by a gas utility. Gases are more difficult to measure than liquids, because measured volumes are highly ...

4. Flow measurement - Wikipedia

   en.wikipedia.org/wiki/Flow_measurement

   Turbine meters are less accurate than displacement and jet meters at low flow rates, but the measuring element does not occupy or severely restrict the entire path of flow. The flow direction is generally straight through the meter, allowing for higher flow rates and less pressure loss than displacement-type meters.

5. Well test (oil and gas) - Wikipedia

   en.wikipedia.org/wiki/Well_test_(oil_and_gas)

   Production tests involve flowing the well at different rates and measuring the flow rates and pressures. –Buildup tests: Buildup tests are conducted on producing wells to measure reservoir pressure and permeability. Builtup tests involve shutting in the well after a production test and measuring the pressure as it builds back up. [7]

6. Allocation (oil and gas) - Wikipedia

   en.wikipedia.org/wiki/Allocation_(oil_and_gas)

   Flow meters for the measurements in the oil and gas upstream industry are chosen based on type of measurement, performance and accuracy requirements, and the type of medium to be measured. Available meters in the market are characterized by properties such as accuracy, operational rangeability: flowrate, viscosity, velocity, pressure and ...

7. Gasoline pump - Wikipedia

   en.wikipedia.org/wiki/Gasoline_pump

   A modern gasoline pump is divided into two main parts – an electronic "head" containing an embedded computer to control the action of the pump, drive the pump's displays, and communicate to an indoor sales system; and a mechanical section which (in a self-contained unit) has an electric motor, pumping unit, meters, pulsers and valves to ...