Instrumentation Pressure Measurement

Instrumentation : Basics of pressure measurement

Pressure measurement 
Pressure is an important process variable.
Pressure is defined as force per unit area.

Pressure = Force / Area
Force can be represented as Pound force,Kilogram force,Newton,dyne
Area can be represented as Square inches,Square feet,Suare Centimeter, Square Meters

Common units of Pressure include:

1.Pounds per square inch (psi)
2.Newton/m2 (=Pa) : SI unit
3.KiloPascals(kPa)

Other units:
Inches(or mm) of water(or Hg)
Bar
Atmosphere(1 atm = 760 mm Hg)
Torr (1 mm of Hg)

Gauge Absolute and Atmospheric pressure

Gauge pressure : Pressure above atmospheric is called gauge pressure.
Vacuum Pressure: Pressure below atmospheric is a vacuum (negative gauge pressure)
Absolute pressure: Absolute pressure is measured from a perfect vacuum

what is absolute pressure,atmospheric pressure,Gauge pressure

Classification of Pressure measuring Instruments

Related posts

Tube fitting Installation procedure

Areej

Maximum Temperature and Pressure Ratings ANSI B16.5 Flanges and Flange Fittings

Rabert T

Measuring density using nuclear radiation

Areej

Leave a Comment

Follow Us on LinkdIn