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An automatic analysis apparatus with a liquid level detection function includes a pipetting device for pipetting a liquid sample from a sample cup to a reaction container by using a pipetting probe that serves as a first capacitor electrode. A sample cup holding means serves as a second capacitor el

An automatic analysis apparatus with a liquid level detection function includes a pipetting device for pipetting a liquid sample from a sample cup to a reaction container by using a pipetting probe that serves as a first capacitor electrode. A sample cup holding means serves as a second capacitor electrode having a ground potential. The conductor material is arranged along a direction in which the pipetting probe moves down for pipetting and is separate from the pipetting device. The conductor material has the same ground potential as that of the sample cup holding means and also serves as a second electrode whereby at any one time either of the sample cup holding means and the conductive material serves as a second capacitor electrode in combination with the first capacitor electrode. An a electrical detector is provided for detecting a change of electrode static capacitance between the pipetting probe and the sample cup holding means and between the pipetting probe and the conductive material as of level detection of the liquid sample. Measurement means are also provided for measuring an ingredient of the reaction container.

대표청구항 ▼

1. An automatic analysis apparatus with a liquid level detection function, comprising:a pipetting device for pipetting a liquid sample from a sample cup to a reaction container by using a pipetting probe that serves as a first capacitor electrode; a sample cup holding means serving as a second capac

1. An automatic analysis apparatus with a liquid level detection function, comprising:a pipetting device for pipetting a liquid sample from a sample cup to a reaction container by using a pipetting probe that serves as a first capacitor electrode; a sample cup holding means serving as a second capacitor electrode having a ground potential; a conductive material arranged over said sample cup holding means and along a direction in which said pipetting probe moves down for pipetting and being separate from said pipetting device, said conductive material being arranged to exist along an overall length of said sample cup when said sample cup is indirectly set to said sample cup holding means by using an auxiliary holding means, said conductive material having the same ground potential as that of said sample cup holding means and also serving as said second capacitor electrode, whereby both said sample cup holding means and said conductive material serve as the second capacitor electrode in combination with said first capacitor electrode; an electrical detector for detecting a change of electrostatic capacitance between said pipetting probe and said sample cup holding means and said conductive material as a level of detection of said liquid sample; and measurement means for measuring an ingredient of said reaction container.