PSA yog ib qho tshiab thev naus laus zis sib cais. Nws lub hauv paus ntsiab lus yog siv molecular sieves txhawm rau txheeb xyuas qhov sib txawv ntawm "adsorption" cov khoom ntawm cov roj sib txawv molecules, yog li cais cov roj sib tov.
Nws kuj tseem tuaj yeem hais tias nws siv huab cua ua cov khoom siv raw, siv cov khoom siv ua haujlwm siab thiab cov khoom siv adsorbents xaiv xaiv adsorb nitrogen thiab oxygen hauv huab cua, thiab thaum kawg ua tiav lub hom phiaj ntawm kev sib cais nitrogen thiab oxygen hauv huab cua.