Patent ID: 8475740

Claim:
A liquid dispensing apparatus of an automatic analyzer comprising: a nozzle which sucks a solution in a cassette and discharges the sucked solution into another cassette, where the nozzle is a first electrode; a cassette holder which holds the another cassette, where the cassette holder is a second electrode; a measurement sensor to measure capacitance between the first electrode and second electrode during a dispensing operation of the nozzle; a computer which judges whether or not there is a failure of the dispensing operation from a change in the capacitance; and a display unit which displays a result of judgment as to the failure of the dispensing operation from the computer, wherein the computer judges whether or not the failure of the dispensing operation has occurred with an analog signal of the change in the capacitance when no failure of the dispensing operation is judged using a digital signal of the change in the capacitance, and the computer does not judge whether or not the failure of the dispensing operation has occurred with the analog signal of the change in the capacitance when the failure of the dispensing operation is judged using the digital signal of the change in the capacitance.