As an Equipment Monitor, the 3M Comply Bowie-Dick Test Pack #1233 is designed to monitor the performance of vacuum-assisted 132C-134C (270F - 273F) steam sterilizers each day. Test packs will reproducibly detect residual air in the sterilizer chamber due to air leaks, air removal failures and inadequate vacuum - any of which can compromise sterility. Easy-to-read test sheet clearly identifies failures and can be filed for record keeping. Lead Free Ink Chemistry. Equivalent to the Bowie-Dick Towel Pack cited in AAMI.