Apparatus for adjusting the static attitude of a head suspension having a gimbal with at least one gimbal arm. Microfluidic devices for separating a denser first material from a less-dense second material are provided. The precipitated filtrate or lignin is subjected to further processing. A heat radiating fin projecting radially is formed on an outer circumferential portion of the cylindrical body of the holding member. A further feature is provided which a plurality of scenes are monitored periodically by one camera and an image analysis function is driven so as to monitor any intruder only when the camera unit is fixedly directed to a specific scene among the scenes.