Biological indicator vials are easy to use and interpret with visual color readout. Self-contained biological indicators significantly reduce possibility of contamination, minimizing false positives and assuring more accurate results. 48 hour result (brown cap) and 24 hour result (blue cap) biological indicators and test packs for steam sterilization cycles. Biological indicators that monitor the effectiveness of the steam sterilization process and provide results within 24-48 hours. Biological indicators provide the best assurance of sterility by challenging the sterilizer with quantifiable, highly resistant spores. Biological indicators are used for Load Monitoring which is the process by which a load is monitored and released based on the result of a biological indicator (BI).