The Peripheral Port Expander (PPE) is a break out box for the peripheral port of the CompactStat and IviumStat. The 37-pin peripheral port signals are transferred from the 37-pin connector to the banana sockets (4mm) for easy connection and access to the various analog and digital inputs and outputs that are available. The banana sockets are colour coded for easy recognition. A DB37-data cable connects the PPE to the potentiostat.