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  2. LVDT flow meter - Wikipedia

    en.wikipedia.org/wiki/LVDT_flow_meter

    The flow meter utilizes a unique combination of a tapered metering cone in series with a piston. The position of the metal piston is sensed by the LVDT circuitry and is then translated into a flow rate. [citation needed] This non linear signal can be directly displayed or linearized with an electrical output.

  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. Turndown ratio - Wikipedia

    en.wikipedia.org/wiki/Turndown_ratio

    The examples are here for gas flow, but the same meter types can be used on liquids as well, with similar turndown ratios. Note that meter manufacturers state their products' turndown ratios—a specific product may have a turndown ratio that varies from the list below. [citation needed] A thermal mass flow meter has a turndown ratio of 1000:1.

  5. 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.

  6. 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).

  7. Utility meter - Wikipedia

    en.wikipedia.org/wiki/Utility_meter

    Gas meter, a specialized flow meter used to measure the volume of fuel gases such as natural gas and propane Water meter , a device for measuring water usage Heat meter , instruments intended for measuring the heat which, in a heat-exchange circuit, is given up by a liquid called the heat-conveying liquid.

  8. Custody transfer - Wikipedia

    en.wikipedia.org/wiki/Custody_transfer

    The rotor spins in proportion to flow rate (see turbine meters) . There are many types of turbine meters, but many of those used for gas flow are called axial meters. [8] The turbine flowmeter is most useful when measuring clean, steady, high-speed flow of low-viscosity fluids.

  9. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    Food in a refrigerator with its door open. A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [1]

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