gauge pressure - definizione. Che cos'è gauge pressure
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Cosa (chi) è gauge pressure - definizione

TECHNIQUE TO MEASURE PRESSURE
Absolute pressure; Gauge pressure; Pressure gauge; Bourdon tube; Vacuum gauge; Ionization gauge; Bourdon gauge; Vacuum Gauges; Ion gauge; Vacuummeter; Vacuummetr; Absolute Pressure; Gauge Pressure; Bayard Alpert gauge; Bayard-Alpert gauge; Penning gauge; Inverted magnetron; Manomometer; Vacuum measurement; Manometric; Gage pressure; Manometer; Difference between gauge and absolute pressure; Decreasing pressure; Bourdon pressure gauge; Oil pressure gauge; Vacuometer; Bourdon tube and gauge; Philips' gauge; Ionisation gauge; Magnehelic gauge; ZenTek; Negative gauge pressure; U gauge; Liquid Column; Pressure gage; Magnahelic gauge; Magnahelic guage; Differential pressure; Redhead gauge; Advantages and limitations of mamometers; Advantages and Limitations of Manometer; Micromanometer; Baratron; Aneroid gauge
  • A pile of pressure capsules with corrugated diaphragms in an aneroid [[barograph]]
  • Bayard–Alpert hot-cathode ionization gauge
  • Dead-weight tester. This uses known calibrated weights on a piston to generate a known pressure.
  • An original 19th century Eugene Bourdon compound gauge, reading pressure both below and above atmospheric with great sensitivity
  • Example of the widely used Bourdon pressure gauge
  • Membrane-type manometer
  • A [[pressure gauge]] in action
  • A McLeod gauge, drained of mercury
  • Application schematic
  • Natural gas pressure gauge
  • Penning vacuum gauge (cut-away)
  • thumb
  • Pirani vacuum gauge (open)
  • psi]] (red scale) and [[kPa]] (black scale)
  • [[Ring balance manometer]]
  • Checking [[tire pressure]] with a spring and piston tire-pressure gauge
  • The difference in fluid height in a liquid-column manometer is proportional to the pressure difference: <math>h = \frac{P_a - P_o}{g \rho}</math>
  • Indicator front with pointer and dial
  • Mechanical details
  • Mechanical side with Bourdon tube

gauge pressure         
¦ noun Engineering the amount by which the pressure measured in a fluid exceeds that of the atmosphere.
vacuum gauge         
¦ noun a gauge for testing pressure after the production of a vacuum.
Manometric         
·adj ·Alt. of Manometrical.

Wikipedia

Pressure measurement

Pressure measurement is the measurement of an applied force by a fluid (liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface area. Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure and display pressure mechanically are called pressure gauges, vacuum gauges or compound gauges (vacuum & pressure). The widely used Bourdon gauge is a mechanical device, which both measures and indicates and is probably the best known type of gauge.

A vacuum gauge is used to measure pressures lower than the ambient atmospheric pressure, which is set as the zero point, in negative values (for instance, −1 bar or −760 mmHg equals total vacuum). Most gauges measure pressure relative to atmospheric pressure as the zero point, so this form of reading is simply referred to as "gauge pressure". However, anything greater than total vacuum is technically a form of pressure. For very low pressures, a gauge that uses total vacuum as the zero point reference must be used, giving pressure reading as an absolute pressure.

Other methods of pressure measurement involve sensors that can transmit the pressure reading to a remote indicator or control system (telemetry).