Provided is a composition for percutaneous administration containing a mixture of polymers forming a surface-segregated film, and an active ingredient. The controller automatically adjusts its output signal to fans such that a fan quickly settles into an appropriate operating speed, even if the fan has been newly installed into the equipment. The spent line is unwound from the rod reel making it ready for replacement in a conventional manner. When the hexagonal head is inserted into the engaging hole, it presses against the upper permanent magnet. The method can be performed in plurality simultaneously with fluorescence or absorbance readouts.