Patent ID: 8262886

Claim:
An apparatus for analyzing characteristics of a particulate comprising: a chamber for receiving a suspension containing a particulate; a pair of electrodes positioned in said suspension; a voltage device for applying a programmed voltage signal comprising an angle-modulated waveform between the electrodes; a capturing device for capturing the area containing at least the tip of the electrode; a monitor for displaying a video data with said capturing device; a processing unit; and an input device for inputting an input data into said processing unit, wherein said pair of electrodes independently moves each other or moves together in the fluid, wherein said monitor displays said video data with a recording time of said capturing device, wherein said processing unit calculates a boundary frequency at which a dielectrophoretic force to a particulate is switched from an attractive force to a repulsive force on the basis of the input data through said input device, and wherein said input data is a stagnant time during which the particulate stays in the vicinity of one of said electrodes on the basis of the video data of said monitor and the recording time data of the capturing device.