Barnstead Biological Indicator (Box of 5) - Sterilization Monitoring for Medical & Laboratory Use - Perfect for Autoclave Validation & Sterility Testing

Run indicator through standard sterilization cycle; compress plastic vial to break glass ampule inside and then incubate for a minimum of 48 hours. When complete, read color indicator: purple means effective sterilization; yellow and cloudy means ineffective sterilization. For a compatible Dri-Bath Block Heater, see 1230W98.

Simple, three step process