Hydraulic pressure gauges measure pressure in fluid systems to ensure optimum performance and detect leaks or pressure changes. They use a Bourdon meter and are made for different pressure ranges and fluid types. They can be permanently installed or portable, with varying levels of quality and accuracy. Recalibration may be necessary after prolonged use.
Many fluid and piping systems operate at a set pressure to ensure optimum performance. A hydraulic pressure gauge is used to measure pressure in a fluid system, to ensure that there are no leaks or pressure changes that could adversely affect system performance. Hydraulic gauges are often used in oil, fuel and water systems that use pumps and compressors and operate at high pressures. Measures pressure relative to the surrounding atmospheric pressure, also called ambient pressure.
A common type of hydraulic meter is known as a Bourdon meter. Uses a curved inner tube that changes shape when fluid pressure is applied. The tube is mechanically fixed to a hand on the pressure gauge dial using a mechanical linkage. As the curved shape of the pipe changes, the pipe will move and rotate the pointer to a position on the dial that corresponds to the pressure in the system. Hydraulic pressure is often measured in pounds per square inch (psi) or as fluid depth, expressed as inches of water or mercury.
Hydraulic pressure gauges are manufactured for different pressure ranges and types of fluid. The pressure gauge chosen for the specific application must be designed to withstand the operating pressure and to be compatible with the fluids used in the system. For highly corrosive fluids or fluids operating at high pressures, materials such as titanium, metal alloys, and chemical resistant plastics are often used to ensure meter performance and maximize service life.
A hydraulic pressure gauge is often permanently installed and used for continuous pressure measurement and monitoring. These gauges can also be purchased as portable portable units. Hydraulic pressure gauges are available in a variety of quality levels and with many operational characteristics. A basic pressure gauge provides a simple analog face for reading pressure and is typically fabricated using steel and brass components. More expensive gauges generally provide a digital readout, have permanently sealed internal components, use better quality materials, and provide a higher level of accuracy.
After a predetermined period of use, a hydraulic pressure gauge may need to be removed from service and recalibrated. The calibration process is completed using a test gauge in conjunction with a device that applies a known fluid pressure to the gauge under test. The test gauge is extremely sensitive and accurate and is used to determine if the gauge being calibrated is measuring the correct pressure or if it requires recalibration or repair.
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