Patent ID: 8197126

Claim:
An analyzer comprising: a specimen dispensing system configured to dispense a specimen to a vessel; and an analysis optical system configured to emit analysis light to analyze the specimen in the reaction vessel; and a stirrer that stirs a liquid contained in the vessel using a sound wave generated by a sound-wave generating unit attached to the vessel; and a cleaning system that cleans the vessel; and a stirring determining device that determines whether stirring by the stirrer is successful or unsuccessful, the stirring determining device comprising: a temperature sensor that measures a temperature of the liquid, wherein the temperature sensor is arranged in the cleaning system; and a determining unit that determines whether stirring of the liquid contained in the vessel is successful or unsuccessful depending on the temperature of the liquid measured at least before and after the stirring by the temperature sensor, wherein the cleaning system is configured to clean the reaction vessel after the analysis optical system finishes analyzing the specimen.