Bourdon tubes rely on the principle that a curved tube tends to straighten Most analog gauges rely on either of two measurement principles:īourdon Tube: Gauges with bourdon tubes are the most common type of analog gauges in use. They can be accurate enough to use as test gauges, reliable enough for use in complex process environments, rugged enoughįor industrial use, and inexpensive enough for commercial use. Pressure gauges are found everywhere as they provide an accurate, inexpensive option that requires no power and little, if any, maintenance.Īnalog gauges can be tailored to fit nearly any application.
While they fulfil the same basic role, analog and digital gauges use different technology and excelĪnalog pressure gauges, often referred to as mechanical gauges, use a needle that points to a number on a scale corresponding to the pressure sensed by the measuring element. When looking at pressure gauges, is that some are digital while others are analog. Pressure gauges are fairly simple devices though there are many considerations that go into selecting the best instrument for your particular application. It is equal to gauge pressureĭifferential pressure: The pressure gauge contains two process connections to measure the difference between two pressures, such as each side of a filter to measure pressure drop. Sealed gauge sensors may use a fixed pressure different than ambient atmospheric temperature.Ībsolute pressure: The pressure gauge is referenced against a perfect vacuum so it, therefore, includes the effects of atmospheric pressure. Gauge pressure: The pressure gauge is referenced against atmospheric pressure so it does not include the effects of that pressure making it equal to absolute pressure The type of pressure refers to the zero reference point of a measurement. There are also different types of pressure to consider. Other units of measure include kg/cm2, inH2O, mmHg, Pa, and many others. Most commonly, we see PSI ( pounds per square inch) or bar. Pressure measurements can be made in a number of units. That rely on accurate pressure control as well as those that derive other values (such as depth/level or flow) based upon pressure. Usually involving liquids and gases, pressure is a critical component of a diverse array of applications, both those Pressure is defined as the amount of force applied over a unit area. Or an important process in an industrial setting.
While other pressure measurement devices such as sensors, transmitters and transducers convert pressure into an electrical signal to be sent to a controller, recorder, orĪnother type of data-acquisition device, pressure gauges are meant to be a local display showing, at a glance, the pressure inside your fire extinguisher, tires, boiler, pressure cooker, Pressure gauges are the simplest, most direct way of measuring and displaying pressure. The status of a boiler system, accurately and immediately knowing the pressure is of importance. Even around the house, when inflating a tire or checking Pressure is the second most common process measurement, after temperature, in industrial and commercial applications. It does not store any personal data.Pressure Gauge Resources Pressure Gauge Accuracy Grades
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