CITIZENSHIP PLACE FUNCTION FOLLOWING THE DECISION

摘要

An apparatus for pipetting a specimen with a nozzle, which can detect not only complete but also incomplete closure of the nozzle. A pressure of an air hose (12) connected to a nozzle (10) for sucking a specimen is detected by a pressure sensor (20) and its detection value is sent to a closure detection portion (26). A plurality of pressure calculation periods are provided to the closure detection portion (26) and a pressure difference in each of the calculation periods is calculated. When a pressure difference exceeds a predetermined threshold value corresponding to each calculation period in that calculation period, a closure alarm is raised. Since a plurality of pressure calculation periods are set, incomplete closure can also be detected besides complete closure, and a pipetting accuracy can be improved.