What Is an Air Pressure Gauge and How Does It Work?
An air pressure gauge is a device used to measure the pressure of air or gas in a system. It is commonly used in applications such as tire pressure monitoring, air compressors, HVAC systems, and industrial machinery.
How It Works
An air pressure gauge operates based on different mechanical or electronic principles. The most common types include:
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Bourdon Tube Gauge (Mechanical)
- This is the most widely used type. It consists of a curved, hollow metal tube that straightens as air pressure increases. This movement is translated into a needle movement on a dial to indicate pressure.
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Diaphragm or Capsule Gauge (Mechanical)
- Uses a flexible diaphragm that expands or contracts with pressure changes. The movement is then transmitted to a needle for reading.
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Digital Pressure Gauge (Electronic)
- Uses electronic sensors, such as strain gauges or piezoelectric sensors, to detect pressure and display it on a digital screen.
Key Features of an Air Pressure Gauge
- Dial or Digital Display: Shows the pressure reading in units such as PSI (pounds per square inch), Bar, or kPa.
- Pressure Range: Determines the maximum and minimum pressure the gauge can measure.
- Accuracy: Varies depending on the type and quality of the gauge.
- Connection Type: Can be threaded, quick-connect, or other types depending on the system it’s attached to.
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