An immediate readout integrator for use in gravity, pre-vacuum and flash cycles. This product is tested to ST-60 and ISO 11140-1:2005 performance claims of Class 5 integrating integrators. 4″ strip has distinct pass/fail criteria and allows for easy removal from packs. FDA cleared as, equivalent in performance to a biological indicator, and offers the highest level of sterility assurance form a chemical indicator. Does not replace the routine use of a biological indicator.