Abstract: A data logger for collecting, storing, and transferring data received from a sterilizer is described herein. The data logger is sized and shaped to fit into a slot or opening defined by the sterilizer and previously used for receiving a printing device to output sterilizer data on a printer ribbon. The data logger includes a circuit to facilitate receiving data formatted to conform to at least two different transmission protocols (e.g. RS-232 serial data transmission protocol or TTL serial data transmission protocol). The circuit allows the data logger to be used with different styles of sterilizers and thus increases the set of viable sterilizers. The data logger includes at least one memory device for storing the logged data. This memory device may be a removable component. The data logger may also include a port or connector element for a second memory device such as a USB stick.