How to Calculate Leak Rate (SCCM) A leak rate is expressed as a volume per unit of time. The rate is found by measuring the change in pressure multiplied by the volume. That number is then divided by the change in time multiplied by the surrounding atmospheric pressure to calculate the leak rate (SCCM). ATM= Atmospheric pressure (PSIA)V= Test volume (cm3)Δp= The decay in pressure during test timeΔt= The amount of decay time (min.)SCCM= Standard Cubic Centimeters per MinuteFor example:Leak rate = .02psi/0.05min*50cm3/14.7psiaLeak rate = 0.4*3.401Leak rate = 1.36 SCCM Leak Rate Calculator Volume: cm3 ∆ Pressure: psi ∆ Time: min Atmospheric Pressure: psia LEAK RATE: If you require assistance identifying any of these metrics or want to learn more about how to calculate SCCM for yourleak detection application, call801-264-1000today. Our highly trained team will help you with calculations for determining SCCM.
