Bar To Psig Converter
Convert pressure from bar (absolute pressure) to psig (pounds per square inch gauge), accounting for atmospheric pressure.
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Understanding Pressure: Bar to PSIG Conversion
When dealing with pressure measurements, it's crucial to understand the difference between absolute pressure and gauge pressure. This distinction is especially important when converting between units like bar (an absolute pressure unit) and PSIG (pounds per square inch gauge).
What's the Difference Between Absolute and Gauge Pressure?
- Absolute Pressure (e.g., bar, psia): This is pressure measured relative to a perfect vacuum (0 pressure). It represents the total pressure being exerted.
- Gauge Pressure (e.g., psig): This is pressure measured relative to the local atmospheric pressure. A tire pressure gauge, for example, reads 0 when it's not connected because it is measuring the pressure *above* atmospheric pressure.
Defining the Units
Bar: A metric unit of absolute pressure, where 1 bar is exactly 100,000 Pascals. It is roughly equal to atmospheric pressure at sea level.
PSIG (Pounds per Square Inch Gauge): An imperial unit that measures the pressure above the surrounding atmospheric pressure.
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