A clock driver chip has several banks of clock outputs driven by a single clock reference. By being connected to the sensor, a controller is adapted to receive a signal from the sensor. Here, the MPR is performed differently depending on a resource allocation ratio A. The sufficient voltage, which includes the drive voltage and which is equal to or greater than the desalination voltage, is applied to the product chamber, consequently effecting desalination. A collar interdisposed between the sleeve and the drive bar includes a stop member extending radially outwardly therefrom.