Liquid dispensing device

A liquid dispensing device, comprising:

• a container for storing a liquid;
• a liquid aspiration/discharge part that aspirates the liquid in the container and discharges the liquid into a dispensing position inside of a reaction vessel, wherein the dispensing position is an inside space of the reaction vessel to which the liquid discharge from the liquid aspiration/discharge part is poured and thus performs dispensation;
• a temperature controller that controls a temperature of the dispensing position in the reaction vessel;
• and a temperature monitor part that monitors the temperature of the dispensing position in the reaction vessel, wherein the device is configured to determine that dispensation is abnormal in response to a change amount of a temperature of the dispensing position deviating from a beforehand determined threshold range after the liquid aspiration/discharge part starts discharging of the liquid to the dispensing position;
• a control part connected to the liquid aspiration/discharge part and to a reaction unit including the temperature controller and the temperature monitor part;
• a storage part connected to the control part;
• and
• a display part and an input part each connected to the storage part, wherein the control part sets a cold-keeping temperature of the liquid in the container and an amount of the dispensation, and
• automatically selects an optimal temperature threshold from among a plurality of temperature thresholds beforehand stored in the storage part according to information received from the input part.