From the oil field, circulation strains, separators, and inventory tanks are all less than some method of pressure. Every facet of an oil Procedure, in the wellhead into the tank, is monitored and overseen by a pressure gauge. pressure gauge, instrument for measuring the situation of a fluid (liquid or http://johnathanuyabb.blogs100.com/14446772/how-much-you-need-to-expect-you-ll-pay-for-a-good-pressure-gauge