The Propper PASS/FAIL™ Challenge Pack provides performance equal to a biological indicator.* The big difference? You can read Propper's PASS/FAIL™ results instantly without mixing. The biological can take up to a week. Yes, a full week. The enzymatic reaction tests can take up to three hours to work.
* This data, published in Propper's PIR #99-2, was included in our 510(K) submission.