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2. 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 ...

3. Gas pycnometer - Wikipedia

   en.wikipedia.org/wiki/Gas_pycnometer

   Gas pycnometer. A gas pycnometer is a laboratory device used for measuring the density —or, more accurately, the volume —of solids, be they regularly shaped, porous or non-porous, monolithic, powdered, granular or in some way comminuted, employing some method of gas displacement and the volume:pressure relationship known as Boyle's Law. A ...

4. Pressure measurement - Wikipedia

   en.wikipedia.org/wiki/Pressure_measurement

   Checking tire pressure with a spring and piston tire-pressure gauge. Pressure measurement is the measurement of an applied force by a fluid (liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface area. Many techniques have been developed for the measurement of pressure and vacuum.

5. Gas meter prover - Wikipedia

   en.wikipedia.org/wiki/Gas_meter_prover

   Gas meter prover. A gas meter prover is a device to verify the accuracy of a gas meter. Provers are typically used in gas meter repair facilities, municipal gas meter shops, and public works shops. Provers work by passing a known volume of air through a meter, while monitoring the gas meter's register, index, or internal displacement.

6. Gas volume corrector - Wikipedia

   en.wikipedia.org/wiki/Gas_volume_corrector

   Gas volume corrector - device for calculating, summing and determining increments of gas volume, measured by gas meter if it were operating base conditions. For this purpose, uses as input the gas volume, measured by the gas meter and other parameters such as: gas pressure and temperature. It is used for the settlement of trade wholesale gas ...

7. Positive displacement meter - Wikipedia

   en.wikipedia.org/wiki/Positive_displacement_meter

   A positive displacement meter is a type of flow meter that requires fluid to mechanically displace components in the meter in order for flow measurement. Positive displacement (PD) flow meters measure the volumetric flow rate of a moving fluid or gas by dividing the media into fixed, metered volumes (finite increments or volumes of the fluid).