CSA Preface This is the first edition of CAN/CSA-ISO 11140-5, Sterilization of health care products — Chemical indicators — Part 5: Class 2 indicators for Bowie and Dick-type air removal tests, which is an adoption without modification of the identically titled ISO (International Organization for Standardization) Standard 11140-5 (second edition, 2007-03-15). Scope This part of ISO 11140 specifies the requirements for Class 2 indicators for Bowie and Dick-type air removal tests used to evaluate the effectiveness of air removal during the pre-vacuum phase of pre-vacuum steam sterilization cycles. Additionally, this part of ISO 11140 includes test methods and equipment used to meet these performance requirements.