Chemical indicators (Table 4) use sensitive chemicals to assess critical variables (e.g., time, temperature, or steam saturation) during a sterilization cycle. They are applied either to the outside or placed on the inside of each instrument unit (e.g., packs, peel pouches, containers, etc…). They do not prove that sterilization has been achieved, but they can provide an early indication of a problem and where in the sterilization process the problem might exist.2,3
Class 1: Process indicators.
Examples: ProChek® ID Indicator Tape
Class 2: Indicators for use in specific tests (e.g., air removal).
Class 3: Single-parameter indicators.
Example: ProChek® ID Paper Strip
Class 4: Multi-parameter indicators.
Examples: Sure-Check® Strips
Class 5: Integrating indicators.
Examples: STEAMPlus™ Class 5 Integrator