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Measure of ability of being compressed. The change in volume of a unit volume of a fluid when subjected to a unit change of pressure.



Related Terms

VOLUME FLOW RATE

The volume of fluid flowing through the cross- section of a conduit in unit time at the pressure and temperature prevailing in that section.

PIEZOMETER

  1. An instrument for measuring fluid pressure, such as a gage attached to a pipe containing a gas or liquid. 2. An instrument for measuring the compressibility of materials, such as a vessel that determines the change in volume of a substance in response to hydrostatic pressure.

ANEROID FLOWMETER

A mechanism to measure fluid flow rate by pressure of the fluid against a bellows counterbalanced by a calibrated spring.

FLOW RATE

The volume, mass, or weight of a fluid passing through any conductor per unit of time.

ANEROID LIQUID-LEVEL METER

A mechanism to measure fluid depth by pressure of the fluid against a bellows which in turn acts on a manometer or signal transmitter.

GRAVIMETRIC ANALYSIS

A method of analysis whereby the dry weight of contaminant per unit volume of fluid can be measured showing the degree of contamination in terms of milligrams of contaminant per liter of fluid.

BULK MODULUS (OF ELASTICITY)

A ratio of normal stress to a change in volume. A term used in determining the compressibility of a fluid. Data for petroleum products can be found in the International Critical Tables.

BALANCED ARMATURE UNIT

Driving unit used in magnetic loudspeakers, consisting of an iron armature pivoted between the poles stair flight. ing winder. A valve having equal fluid pressure in both the opening and closing directions.

FLUID DRAM

Abbreviated fl dr. 1. A unit of volume used in the United States for measurement of liquid substances, equal to 1/8 fluid ounce, or 3.6966911953125 10^-6 cubic meter. 2. A unit of volume used in the United Kingdom for measurement of liquid substances and occasionally of solid substances, equal to 1/8 fluid ounce or 3.5516328125 10^-6 cubic meter.

DISK METER

A positive displacement meter to measure flow rate of a fluid; consists of a disk that wobbles or nutates within a chamber so that each time the disk nutates a known volume of fluid passes through the meter.

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