Most experts know the biological indicator (BI) as monitoring the sterilization process. This is because BI directly evaluates the sterilization process using resistant microorganisms. The RRS packet containing spore strip is specially designed for the monitoring of dry heat at 160 -180 ºC sterilization processes. The Bacillus atrophaeus Spore Strip (Dry Heat) (RRS 14-22110) is compliant with ISO 11138.