BioNova: STEAM Biological Indicators -24 hrs - BT-20 Self-contained Biological Indicator for Steam sterilization processes Designed for steam sterilization process control Color indicator to indicate whether sterilization was successful or not Purple to yellow= live Geobacillus stearothermophilus spores= Sterilization cycle unsuccessful Purple= sterilization successful Final reading= 24 hours Ideal for vacuum assisted steam sterilization cycles at 121-134°C and for gravity air displacement steam sterilization cycles at 121-134°C Incubate the processed biological indicator and the indicator used as positive control for a maximum of 24 hours at 60±2 ºC Content: 1 box of 100 pcs 24 Hours 100/pk Self-contained Biological Indicator for Steam sterilization processes Designed for steam sterilization process control Color indicator to indicate whether sterilization was successful or not Purple to yellow= live Geobacillus stearothermophilus spores= Sterilization cycle unsuccessful Purple= sterilization successful Final reading= 24 hours Ideal for vacuum assisted steam sterilization cycles at 121-134°C and for gravity air displacement steam sterilization cycles at 121-134°C Incubate the processed biological indicator and the indicator used as positive control for a maximum of 24 hours at 60±2 ºC Content: 1 box of 100 pcs 24 Hours 100/pk