What is the maximum reading on a typical R22 compound gauge?

Understanding Pressure Measurement with PSIG

PSIG (Pounds per Square Inch Gauge) is a unit of pressure measurement that reflects the pressure above atmospheric pressure. It is commonly used in various industries, including HVAC systems, automotive, and manufacturing.

When you see a pressure reading in PSIG, it means that the value displayed is the pressure relative to the atmospheric pressure. For example, if a pressure gauge shows 30 PSIG, it means the pressure is 30 pounds per square inch above the atmospheric pressure at that location.

This type of pressure measurement is important in determining the pressure levels within a system or device, allowing for accurate monitoring and control. PSIG is often used in conjunction with other pressure units such as PSIA (Pounds per Square Inch Absolute) in certain applications.