Salesworth India Private Limited supplies Self-contained Solution Sterilization Biological Indicators. Salesworth India Private Limited supplies biological and chemical indicators as pharmaceutical products for the healthcare industry. Self-contained Solution Sterilization Biological Indicators is used for monitoring steam sterilization of liquids in ampoules, large containers or washer sterilizers. Self-contained Solution Sterilization Biological Indicators provides easy visual confirmation of sterilization within 48 hours without the need of difficult and time-consuming laboratory work. A small 1 ml snap-top constricted neck glass ampoule contains spores of Bacillus stearothermophilus suspended in a specially formulated culture medium that turns a dramatic yellow when the spores grow. The ampoule is so designed to sink to the bottom of large containers for the most effective validation of the sterilization cycle. It is available in the trade mark of MagnaAmp.