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

ANEROID FLOWMETERA mechanism to measure fluid flow rate by pressure of the fluid against a bellows counterbalanced by a calibrated spring. 
FLOW RATEThe volume, mass, or weight of a fluid passing through any conductor per unit of time. 
ANEROID LIQUIDLEVEL METERA mechanism to measure fluid depth by pressure of the fluid against a bellows which in turn acts on a manometer or signal transmitter. 
GRAVIMETRIC ANALYSISA 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 UNITDriving 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 DRAMAbbreviated 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 METERA 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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