TABLE OF CONTENTS Pressure is the force per unit area that a liquid or gas exerts on its surroundings, such as the force or pressure of the atmosphere on the surface of the Earth, and the force that liquids exert on the bottom and walls of a container. Pressure is not only an important parameter for process control, but also as an indirect measurement for other parameters. Not only is it important to select the right device for the required range and accuracy, but the device must be immune to contamination and interaction with the fluid being measured. As technology evolves, new and improved methods of accurately measuring pressures are constantly being developed [1].
[1]Wilson, J. S., "Pressure Measurement Principles and Practice," Sensors Magazine, Vol. 20, No. 1, January 2003.
Pressure units are a measure of force acting over unit area. It is most commonly expressed in pounds per square inch (psi) or sometimes pounds per square foot(psf) in English units; or Pascals (Pa) in metric units, which is the force in Newtons per square meter (N/m 2).
The liquid in a container has a total weight of 152 kN, and the container has a 8.9 m 2 base. What is the pressure on the base?
The pressure at a specific depth in a liquid is termed hydrostatic pressure. The pressure increases as the depth in a liquid increases. This increase is due to the weight of the...
