PSIA (Pounds per Square Inch Absolute) measures pressure from a perfect vacuum, while PSIG (Pounds per Square Inch Gauge) measures pressure relative to the local atmospheric pressure, making PSIA readings higher than PSIG by the atmospheric pressure value (around 14.7 psi at sea level). PSIG is common for everyday uses like tire pressure, whereas PSIA is used in scientific and engineering contexts requiring total pressure. #hvac #hvaclife #hvactech
4:30
PSIA (Pounds per Square Inch Absolute) measures pressure from a perfect vacuum, while PSIG (Pounds per Square Inch Gauge) measures pressure relative to the local atmospheric pressure, making PSIA readings higher than PSIG by the atmospheric pressure value (around 14.7 psi at sea level). PSIG is common for everyday uses like tire pressure, whereas PSIA is used in scientific and engineering contexts requiring total pressure. #hvac #hvaclife #hvactech
14.1K views3 months ago
TikTokadamdeckardbaby
See more