The gke Steri-RecordⓇ batch monitoring systems (BMS) are used for routine monitoring in steam sterilization processes in each cycle to detect insufficient air removal, leaks and/or non condensable gases (NCG) in steam. Monitoring temperature and pressure alone does not provide sufficient information to ensure steam penetration. The gke BMS is a Type 2 indicator according to EN ISO 11140-1, consisting of a ,,specific test load" (Process Challenge Device = PCD) and "indicator system" (indicator strip). The BMS is a hollow load test according to EN 867-5.