instruction sequences 64 and 66 and may thereby control the chamber assembly 22 fig1 and the concentration device 28 fig1 by communicating with the chamber assembly interface 86 and the concentration device interface 88 over the system bus 80 the chamber assembly interface 86 is able to communicate with the chamber assembly 22 by means of control and communication path 24 see also fig1 likewise with further reference to fig1 the concentration device interface 88 is able to communicate with the concentration device 28 by means of control and communication path 27 the embodiment illustrated in fig2 further may comprise a network interface 84 which is capable of communicating with the processor 54 through the system bus 80 and further capable of communicating with an external network over communication path 36 an embodiment of the network interface 84 can comprise a wired interface that may connect for example to a network comprising a remote server another embodiment of the network interface 84 may comprise a wireless interface having similar capabilities a modified embodiment may employ a serial interface in addition to or instead of the network interface 84 the serial interface for example a universal serial bus usb interface may be capable of communicating with an external device such as a printer according to yet another embodiment the programmable processing device can further comprise a display interface 90 capable of communicating with a display device such as a printer or a screen through a display port 38 the programmable processing device 32 further may comprise a miscellaneous interface 92 capable of receiving input from for example at least one of a barcode reader keypad wireless remote magnetic strip or flash card reader the permanent.