Pressure is measured using instruments called pressure gauges, vacuum gauges, or compound gauges. These instruments provide a way to quantify the force exerted per unit area.
Types of Pressure Gauges
Different types of gauges exist, each suited to specific pressure ranges and applications.
The reference mentions the widely used Bourdon gauge as a mechanical device that both measures and indicates pressure.
Mechanical Pressure Gauges
Mechanical gauges are often used for their simplicity and reliability. Here is how these instruments operate:
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Bourdon Gauge: A curved tube that straightens slightly when pressure is applied inside. This movement is translated to a needle to indicate the pressure on a dial.
- Widely used and a good example of a gauge that both measures and indicates pressure.
- Suitable for many applications.
Digital Pressure Gauges
Digital gauges offer precise readings and often have features like data logging and alarm settings. They use electronic sensors to measure pressure and display the value on a digital screen.
How Pressure Gauges Work:
Whether mechanical or digital, pressure gauges typically:
- Sense the pressure: The gauge interacts with the fluid (gas or liquid) it's measuring.
- Convert to a signal: This is done through mechanical or electronic means.
- Indicate the result: Display the pressure value on a dial or digital screen.
Practical Considerations
- Selecting the right gauge: Choose a gauge based on the range and conditions of the environment.
- Calibration: Ensure gauges are properly calibrated for accurate readings.
- Placement: Proper installation of gauges is key for reliable operation.
Summary
Pressure measurement primarily involves using gauges that convert the applied force into readable values, with pressure gauges like the Bourdon gauge, as well as vacuum and compound gauges, being standard for indicating pressure.
