What Are the Different Types of Pressure?
Hi! This is David from Omega Engineering, and today I wanted to talk to you a little bit about Different Types of Pressure. And by that, I’m going to be talking about Gauge, Differential, and Absolute Pressure.
Now keep in mind that when measuring pressure all pressures are measured in relation to a reference pressure.
Gauge Pressure
Gauge pressure would be defined as a pressure which is measured in relation to local ambient pressure. A car tire pressure would be 32 psig ABOVE local ambient pressure.
Differential Pressure
Differential pressure is the pressure measurement between two pressure points. So, let’s say this truck tire pressure is 38 psig and this car tire pressure is 32 psig – the pressure differential between this two would be 6 psid (for differential).
Absolute Pressure
Now, Absolute pressure can be defined as the pressure measured in relation to a perfect vacuum. You can determine absolute pressure by adding ambient pressure and gauge pressure. So, if we filled the car tire pressure to 32 psia in outer space or in perfect vacuum, and we brought it all the way down to the surface of the Earth, you’ll see the car tire pressure drop to 17.3psig in relation to local ambient pressure 14.7 psia.
So, there we have it folks: we have covered the three main pressures – Gauge, Differential, and Absolute pressures. If you want to talk to one of our many engineering experts, call or chat online at https://www.omega.com/en-us/contact-us. Thanks for watching, be sure to like and subscribe.