How to Measure PSI

Pressure is a variable which is used in physics, engineering and meteorology. It is a measure of the force per unit area, and is measured in a number of different unit systems including Pascals, bars and pounds per square inch (PSI). Pressure can be measured with the use of barometers, which come in a variety of forms. Today, digital barometers can be acquired for reasonable prices of around 150 dollars from everyday electronics retailers.

Things You'll Need

• Digital barometer

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Instructions

1. • 1

     Switch on the digital barometer using the button on the front panel.

   • 2

     Select the measurement range. To do this press the mode button a few times until the measurement range blinks on the screen. Use the up and down arrows to select the correct range.

   • 3

     Read off the value of pressure. The units will be presented in millibar.

   • 4

     Convert the pressure from millibars to PSI. Multiply the pressure in millibar by 0.0145 in order to get the pressure in PSI.