A media event timer includes a counter module for generating a sequence of counts based on a clock signal of a disk drive unit. The probes used for detecting a substance of interest are caught in advance on particles, and the particles are fixed in each of sections arranged in form of lattice using a chemical patterning method on the surface of a baseplate. A release layer is formed on the carrier substrate. The drive portion and the driven portion contact each other by a second load which can not transmits the driving force from the driving source to opening-closing mechanism when the clutch is the non-energization state. A cleaning liquid supply flow channel is opened to the air in a connected portion of the cleaning liquid supply flow channel and a cleaning liquid adding nozzle.