In food processing applications, absolute pressure gauges are used to monitor the performance of high-end vacuum pumps to ensure that perishable items are sufficiently sealed. Absolute pressure gauge readings are used in applications that require non-variable values, and those instruments include altimeters and barometers. The difference is that zero is referenced against a perfect vacuum, which is constant, instead of the ambient atmosphere, which changes depending on weather conditions and altitude. Absolute pressure gaugeДЄn absolute pressure gauge operates with the same technology as standard pressure gauges. вЂњGauge pressureвЂќ is another way of saying вЂњrelative pressure,вЂќ and most manufacturers use the term вЂњpsiвЂќ rather than вЂњpsig.вЂќ WIKA USA offers a complete line of standard gauges reading in psi, with a wide variety of models designed to meet the needs of many industries and applications. The unit for a pressure gauge reading relative pressure is psi (pounds per square inch) or psigВ (pounds per square inch gauge). This pressure can be either positive or negative (vacuum), depending on the pressure as it relates to atmospheric pressure.

In other words, a pressure gauge reading relative pressure is always exposed to atmospheric pressure and reads zero at atmospheric pressure. In most cases, a standard pressure gauge is reading the total pressure minus the atmospheric pressure. Also for low pressure ranges, but for liquids and aggressive media as well, a diaphragm element is the better choice. For very low pressure ranges (< 10 psi or 0.6 bar) and for gaseous media, the capsule or bellows sensing element is commonly used. The smallest pressure range for Bourdon tubes is 10 psi (0.6 bar). The Bourdon tube is the most common sensing element for gauges that measure gauge pressure relative to atmospheric pressure. Model 111.12 Bourdon tube pressure gauge with gauge reading in psi There are three main types of industrial gauges: Standard pressure gauge Digital pressure gaugesrely on thin-film technology or a diaphragm. Analog pressure gauges use a Bourdon tube, diaphragm element, capsule element, or magnetic piston for sensing pressure. Industrial gauges come in both analog and digital versions. Most other regions around the globe use gauges reading in metric units such as bar, kPa, MPa, and kg/cm 2, to just name a few. The majority of gauges reading in psi are sold and used in the U.S. Gauges readings in psi come in a variety of models and can be applied to all industrial and process applications. Industrial processes and scientific laboratories rely on gauges reading in psi to measure relative pressure (psi or psig), absolute pressure (psia), and differential pressure (psid). In most of North America, psi (pounds per square inch) is the standard unit of pressure measurement. You can find high- and low pressure fittings, tubing and connectors in our online shop.Pressure gauge readings come in a variety of international units. For more exact data, please use the conversion factors: 1psi = 68.9476 mbar 1bar = 14.5038 psi For your convenience we provide easy pressure conversion tables between psi (pounds per square inch) and bar (mbar) and from bar (mbar) to psi. The fluid transfer community uses both, the metric system (international System of Units) as well as the English system (U.S customary system) for pressure data.

10 psi to bar