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Single channel data loggers are usually stand-alone, and data is not read by a PC in real time, but rather when logging is completed, the memory device in the data logger is inserted into and read by the PC. Data loggers which use only internal memory like this, as opposed to those which transmit data in real time to a computer, usually have a low sample rate due to the limited memory.  Multiple channel data loggers transfer data to a PC easily by the use of buses such as USB (Universal Serial Bus) or ethernet, or wirelessly. USBs have the advantage that they are readily accepted and auto detected by PCs, however the cable length is usually limited to 3 to 5m. Ethernet cables require more installation effort, but can be used over a much larger range from sensor to PC, up to 100m [www.ni.com], \cite{NatInstruments},  and can connect data straight to a network to be accessed by several PCs at once. In some cases, cables may be inconvenient, either because they would have to run a long distance, or due to time spent installing the cables, and determining the most efficient infrastructure, so wireless data transfer has an advantage; however a disadvantage is that data transfer is much slower and less reliable with wireless transfer. For the purpose of reliable, real time data acquisition on a PC, from an electro-forming system, ethernet data transfer is the most advantageous method; having the data accessible from several PCs secures data storage, and the system is small and compact, so wireless technology would not be necessary.