defined as a ratio between

a force and a unit area, perpendicular to the direction of that

force, on which the force acts.

(a)  

is defined as the amount of force being applied to an area. As this force is distributedover a specific area, a change in movement of the defined area

is occurring.

(a)  

just an occurrence that is causing an object to move, either

accelerating or decelerating.

(a)  

All fluid molecules will be in constant and random

motion, due to which fluid at rest ina vessel, does exerts force on all the walls of the vessel, with which it is in contact.

(a)  

Also referred as “hydrostatic pressure” is the

pressure of a fluid at rest.

(a)  

the pressure of a fluid moving.

(a)  

Any substance that does not conform to a fixed shape

such as liquid or gas.

(a)  

Defined as a pressure not associated with the fluid

motion, but its state. It is the pressure which would be

indicated by a gauge moving together with the fluid.

(a)  

A measurement of kinetic energy of a moving fluid and

depends on its velocity and density.

(a)  

was granted the patent for a water pump system used

on irrigation.

(a)  

invented the barometer, with which he could

evaluate the atmospheric pressure. His research about mercury

columns pave way to his discovery of vacuum.

(a)  

used thebarometer to show that the air pressure was smaller at the topof the mountains. He also determined the weight of air

(a)  

was granted the

Bourdon Tube patent, used until today in relative pressure

measurements.

(a)  

it is measured with relation to perfect vacuum,

namely, the pressure difference at a given measurement point by

the vacuum pressure (absolute zero).

(a)  

it is the pressure difference measured

between two points. When any point other than vacuum or

atmosphere is used as reference

(a)  

it is measured in relation to the ambient

pressure, namely, in relation to the atmosphere. It is always

important to register on the notation that it is a relative

measurement.

(a)  

a fluid-filled tube where an applied

gas pressure causes the fluid height

to shift proportionately.

(a)  

It consists of a glass tube bent like the letter 'U'. Balancing a column of liquid is done by another column of same or other liquid. One end is

attached to the point where pressure is to be measured, while the

other end is open to atmospheric pressure.

(a)  

The rise in liquid level in the tube is considered while

that in the well is ignored.

(a)  

It is similar to a well type manometer in construction. The only difference being that the vertical column limb is inclined at an angle θ.

(a)  

is commonly used

to check blood pressure in humans.

(a)  

the mercury reading on the pressure gauge when the pulse is first heard,

(a)  

when the pulse can first no

longer be heard.

(a)  

uses a microprocessor and pressure

transducer to sense slight changes in pressure. It gives the pressure

readout on a digital screen.

(a)  

resemble an accordion constructed from metal

instead of fabric. Increasing pressure inside

causes it to elongate. They are thin-walled metallic cylinders,

with deep convolutions, of which one end is sealed and the

other end remains open. The closed end can move freely while

the open end is fixed.

(a)  

is nothing more than a thin disk of material

which bows outward under the influence of a fluid pressure.

(a)  

are made of spring-like metal alloys bent into

a circular shape. Under the influence of internal pressure, it “tries” to straighten out into its original shape before being bent at the time of manufacture.

(a)  

means a resistance that changes value with applied pressure.

(a)  

is a sensor whose resistance varies with applied force; It converts force,

pressure, tension, weight, etc., into a change in electrical resistance

which can then be measured.

(a)  

Like the strain gauge,

it use a change in electrical characteristics to infer pressure. Here a change in capacitance is used to infer pressure measurements

(a)  

the _ in the metal of the

diaphragm allow it to easily flex with applied pressure,

transmitting process fluid pressure through the silicone fill

fluid to the taut sensing diaphragm inside the differential

capacitance cell.

(a)  

states that the pressure at any point in a fluid at rest is equal and its value Is just the weight of the overlying fluid

(a)  

used for accurate measurement of small pressure

(a)  

these devices converts a fluid pressure into a force

(a)  

some diaphragms are intentionally constructed out of materials with little strength, such that there is negligible spring effect. They are used in conjunction with external mechanism that produce the necessary restraining force to prevent damage from applied pressure

(a)  

bourdon gauge is invented in _

(a)  

devices designed to measure fluid pressure and transmit that information via electrical signals such as 4-20mA analag standard or in digital form such as hart to foundation field bus

(a)  

objects internal resisting forces

(a)  

defined as the displacement and deformation that occur

(a)  

device that stores electrical charge. it consist of two metal plates separated by an electrical insulator

(a)  

classic example of a pressure isntrument based on the differential capacitance sensors.

(a)  

one of the most common and most useful pressure measuring instrument in the industry. This devices senses the difference in pressure between two ports and outputs a signal representing that pressure in relation to a calibrated range

(a)  

weight of air

(a)  

an elastically deformable tranducer that transforms an applied force or a mechanical displacement into a change in resistance.

(a)