TST Helix and 250 indicators - 134˚C-137˚C for up to 3.5 minutes Conforms to EN 867-5(4) The Browne TST Control Helix is a Hollow Load Process Challenge Device (PCD) and has been developed and validated for testing the air removal (steam penetration) capability of small Type B steam sterilizers. Use in any other sterilizer or with any other type of indicator, may give dangerously misleading results.
