Patent ID: 7297097

Claim:
A centrifuge, comprising; a centrifugal motor; a rotor coupled to an output shaft of the centrifugal motor; and a rotor lever mounted to the rotor to rotatably support a bucket containing a sample therein, wherein the centrifuge further comprises: an upper sensing plate provided below a rotating track of the bucket, the upper sensing plate moving upwards to spatially isolate and seat the bucket; weight sensing means provided under the upper sensing plate to sense a weight of the bucket seated on the upper sensing plate; position sensing means to sense a predetermined high position and a predetermined low position of the upper sensing plate; lift means to move both the upper sensing plate and the weight sensing means vertically; and control means to control an operation of the centrifugal motor, to control the lift means using a signal output from the position sensing means, and to determine the weight of the bucket using a signal output from the weight sensing means.