We are the distinguished manufacturer and supplier of biological indicators in india. Usage of biological indicators can lower the outsourcing cost of complete sterility tests by 60%. They help in verifying the sterility of instruments, media and other steam-sterilized items in just two days by using a simple three-step process. steps : run an indicator through a standard sterilization cycle then compress the plastic vial, and finally incubate. yellow, cloudy results indicate an ineffective sterilization process.