What type of sterilizer do you use and how do you test it?

We have 2 autoclaves that we use. We have a Statim 2000 and a newer state-of-the-art Statim 2000 G4. Our autoclaves are tested weekly by Mesa Labs, instead of monthly as the state of Nebraska requires. All piercing cycles also have a Class 5 Integrator inside of the sterilization cassette during sterilization.