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Flow Meters Terms

Absolute Pressure – Atmospheric pressure plus gage pressure.

Accumulator – Area where fluid is under pressure and stored as a source of power.

Control Point – The temperature an instrument needs to maintain to perform its designated function.

Coriolis Force – The force that occurs when a mass has a velocity moving outward in a rotating plane.

Counter Weight – A mass that is added to a particular substance to create a more balanced and stable apparatus.

Current – The flow rate of electricity.

Density – A substance’s mass per unit of volume.

Flow – The travel of materials in response to a force, such as pressure.

Flow Nozzle – A constriction made of a contoured plate that forms a hole for the flow stream so a measurement can be taken.

Flow Rate – The velocity of flow.

Head-Loss – The loss of pressure in a flow system that is measured with a length parameter (such as amount).

Hot-Tap – Allows for a flow meter to be inserted or removed without causing a complete system shutdown.

Integrator/Totalizer – A device that measures the total flow of fluids.

Manometer – Measures fluid pressure. This is a U-shaped tube containing liquid which adjusts with the pressure in the tube.

Mass Flow Rate – The volumetric flow rate of a liquid or gas times its density, expressed as pounds per hour or kilograms per minute.

Potential Energy – The potential of energy when a liquid is in a position or height above a place to which it can potentially flow.

Transducer – The part of a flow meter that senses fluid as it passes through the device.

Transmitter – The part of a flow meter that produces the usable flow information from the transducer.

Weldolet – A connection for a metal pipe that is used to aid as a fitting for insertion-type sensors or meters.