A combined pressure and temperature sensor for recording the pressure and the temperature of a medium. The grid straps are made from a relatively low growth zirconium alloy, and the springs are made from a relatively high growth zirconium alloy. The water is added in excess of that which is absorbed by the fly ash so that the dough contains free water so as to be in at least a partially fluid state. An interactive graphical user interface is also provided for allowing a user to remotely preview media products through a communications link where the GUI includes a plurality of trigger fields identifying a plurality of pre-recorded media products, each of the plurality of trigger fields being associated with a preview clip. The key acquisition unit generates a content key using the acquired rights key and, when required, a medium key recorded in a medium.