A printer has a pair of frame panels that support the ends of a carriage guide shaft, a carriage that carries a print head, a carriage drive motor, and first and second pulleys on which a belt connected to the carriage is mounted. The invention includes photodetectors having metal-semiconductor-metal structures, P-i-N structures, and Schottky-barrier structures. The fluid transfer component has a first surface, a second surface, a non-random pattern of distinct pores each defining a pathway between the first and second surfaces, a single entry point at the first surface, and a single exit point at the second surface.