Lab Equipment Online now supplies biological indicators so you can verify the efficacy of our autoclave run. The BT-20 is a self-contained biological indicator for steam sterilization processes at 121ºC to 134ºC. Supplied in a box of 100 indicators.
Polypropylene random copolymer tube: 44.0 mm high x 8.5 mm external diameter. Wall thickness: 0.5 mm.
Polypropylene cap: 10.5 mm diameter, 13.0 mm high. Wall thickness: 1.0 mm.
Glass ampoule: 35.0 - 38.0 mm high. External diameter: 6.5 mm.
Wall thickness: 0.2 - 0.3 mm.
Culture medium: 0.5 - 0.7 ml, purple colour.
Cap filter: medical grade paper, 60 g/m2, 16.0 mm diameter.
Filter Paper: 8.0 mm diameter, 160 g/m2.
10^5 or 10^6 Geobacillus stearothermophilus ATCC 7953 spores per vial.
Positive growth results (failure in the sterilization process): culture medium turns to yellow, incubation at 60ºC for 24 hours (maximum).