| 摘要 |
PCT No. PCT/JP93/01227 Sec. 371 Date May 15, 1995 Sec. 102(e) Date May 15, 1995 PCT Filed Aug. 31, 1993 PCT Pub. No. WO95/06878 PCT Pub. Date Mar. 9, 1995A pipetting apparatus is provided with clot detection. The pipetting apparatus comprises a nozzle for aspirating a sample. A pressure sensor is connected with the nozzle for measuring pressure in said nozzle. A plurality of pressure difference calculating circuits are operatively connected with the pressure sensor, each for inputting an output of said pressure sensor and obtaining a pressure difference at a different pressure calculation period, respectively. A plurality of discriminating circuits each having a different discrimination threshold value determined according to each of the pressure calculation periods are provided. An alarm circuit is included for outputting a clot detection alarm signal when at least one of said discriminating circuits discriminates that the obtained pressure difference exceeds the discrimination threshold value. |
