ADACX multi-variable steam sterilization indicator card is designed to be used in sterilization packages and in some places of sterilize chamber, where sterilizer agent could not access easily. The sterilization indicator color changes from purple to blue in the steam sterilization process at temperature of 121℃and time of 15 minutes or 135℃and 3.5 minutes. The multi-variable indicator card is 18mm×80mm paper strip which react critical parameters(temperature, steam and time)of steam sterilization process. The multi-variable steam sterilization indicator card belongs to ISO 11140-1 CLASS 4.