Promotional price valid on web orders only. Your contract pricing may differ. Interested in signing up for a dedicated account number?
Learn More

Mesa Labs Prospore™ Self-Contained Biological Indicator

Ideal for validating steam sterilization of liquids

Manufacturer:  Mesa Labs PS550

 View more versions of this product

Catalog No. 12-001-2

Add to cart
This item is not returnable. View return policy



Safe, easy-to-use, self-contained biological indicator used to validate or monitor steam sterilization in hospitals and pharmaceutical facilities.

  • No activation is required—simply expose ampule sterilizer and incubate afterwards
  • Sealed Prospore ampules contain Geobacillus stearothermophilus spores suspended in growth media
  • Bromocresol purple pH indicator added to assist in detecting spore growth
  • Outgrowth of spores decreases pH, causing a color change from purple to yellow
  • Standard population is 105 per unit
  • Results available in 48 hours
  • 4mL ampules

Order Info

For 121°C steam sterilization cycles only. A control test should be used to verify spore viability.



Validating steam sterilization of liquids
2 to 8°C
35.6 to 46.4°F
Provide Content Correction

We continue to work to improve your shopping experience and your feedback regarding this content is very important to us. Please use the form below to provide feedback related to the content on this product.

Product Title

By clicking Submit, you acknowledge that you may be contacted by Fisher Scientific in regards to the feedback you have provided in this form. We will not share your information for any other purposes. All contact information provided shall also be maintained in accordance with our Privacy Policy.

Cancel Submit