BT 20 Usage: Monitoring vacuum-assisted Steam Sterilization processes at 121°C-135°C and gravity air - displacement Steam Sterilization processes at 121°C-135°C Authorization: Designed under Quality Management System standards ISO 13485:2003 Storage conditions: T= 10-30 °C, RH 30-80 %, keep ina dark place Shelf Life: 24 months BT 10 Usage: Monitoring Ethylene Oxide Sterilization Processes. Authorization: Designed under Quality Management System standards ISO 13485:2003 Storage conditions: T= 10-30 °C, RH 30-80%, keep in a dark place Shelf Life: 24 months.