Abstract: In a method for distributing liquids, in which a distribution tip attached detachably to the lower end of a distribution nozzle can be replaced at any time necessary, a tip rack having a plurality of unused distribution tips lined up thereon is placed on a fitting stage to have the distribution tips fitted with a distribution nozzles. Then, the existence, or non-existence, of a distribution tip left behind on the tip rack without being attached to a distribution nozzle after the fitting operation is finished is detected by a detection section formed of an interrupting-type light sensor, the targeted place of detection by the light sensor being the lower end of the distribution tip. Under the above-described structure, misfitting of a distribution tip can be detected with a high certainty at an early stage before an operation for sucking/discharging liquids is started.
Type:
Grant
Filed:
April 12, 1999
Date of Patent:
May 29, 2001
Assignee:
Matsushita Electric Industrial Co., Ltd.