Calibrated type Spore Suspension is packed in vial containing 10 mL of a known concentration of spores suspended in 40% ethanol or aqueous solution. The Spore Suspension is a calibrated suspension of bacterial spores appropriate for preparing custom biological indicators for monitoring steam, ethylene oxide, dry heat and radiation industrial sterilization processes. The Spore Suspension is hygienically processed to ensure safety of consumption. Calibrated type Spore Suspension comes in different specifications to cater to specific requirement.