We have found an answer, and have a new data logger that can be used in autoclaves. The HiTemp 135⁰C Temperature Logger is a rugged, submersible, battery operated, stand alone device which can be used to automatically record temperatures between -40 to 135⁰C. There is software that goes with this item, so one can download all the times and temperatures into their computer. The software makes record keeping for audits a snap, providing validation reports and is perfect for cooler monitoring, as well.
This is the perfect item to "fit the bill" when maximum registering thermometers are banned, as well as for those that want a more advanced form of valid reporting.