An apparatus is provided which includes a holder operable to retain an article for interaction with a medium. The detection apparatus utilizes three or more thermopiles to detect an intruder into the space and in which output difference between detection values outputted from a pair of said thermopiles is obtained, and then, the intruder is detected by the comparison between these output differences obtained from different pairs of the thermopiles. A radially outer end surface of the brush is tilted relative to the contact wall, so that the brush is urged against the contact wall by a compression coil spring, which urges the brush against a commutator of an armature. An electric motor drives the pump. A first and second clocking signal provide the clock rates for the first interface and the data rate converter.