When she won an award at 2012 music seminar in New York, Morris made Nashville connections. With some help from Musgraves, a fellow Texas pal, Morris moved to Music City a year later. At the time, Morris felt a bit burned out as a performer, and she was eager to hone her songwriting chops.
The differential pressure gauge measures the flow rate by finding the difference in pressure before and after the orifice. Differential pressure gauges are an easy way to get a visual indication of process flow.
The converse is pounds per square inch gauge or pounds per square inch gage (psig), indicating that the pressure is relative to atmospheric pressure. For example, a bicycle tire pumped up to 65 psi above local atmospheric pressure (say, 14.7 psia locally), will have a pressure of 65 + 14.7 = 79.7 psia or 65 psig. When gauge pressure is referenced to something other than ambient atmospheric pressure, then the units would be pounds per square inch differential (psid) .