Abstract: This automated analyzer comprises a first system 11 that does not need to use degassed water, a second system 12 for which it is preferable to use degassed water and that comprises a degassing device 21 for producing degassed water and a second pump 19 for delivering the degassed water, and a tank 1 having formed therein a first compartment 4 for storing water to supply to the first system 11 and a second compartment 5 for storing degassed water to supply to the second system 12. The second system 12 comprises a circulation system, which comprises a suction flow path 20 and return flow path 24 for connecting the degassing device 21, the second pump 19, and the second compartment 5 of the tank 1, and a usage system, which comprises a discharge flow path 22 and connection flow path 27 for connecting the degassing device 21 and a usage unit for using the degassed water.

Abstract: This automated analyzer comprises a first system 11 that does not need to use degassed water, a second system 12 for which it is preferable to use degassed water and that comprises a degassing device 21 for producing degassed water and a second pump 19 for delivering the degassed water, and a tank 1 having formed therein a first compartment 4 for storing water to supply to the first system 11 and a second compartment 5 for storing degassed water to supply to the second system 12. The second system 12 comprises a circulation system, which comprises a suction flow path 20 and return flow path 24 for connecting the degassing device 21, the second pump 19, and the second compartment 5 of the tank 1, and a usage system, which comprises a discharge flow path 22 and connection flow path 27 for connecting the degassing device 21 and a usage unit for using the degassed water.

Abstract: The occurrence of splash of a sample or a reagent from a nozzle tip is prevented during shifting of a dispensing mechanism. An automatic analyzer includes a nozzle for sucking liquid to be dispensed; a pump for allowing suction of the liquid into the nozzle and generating pressure variations; a pipe line connecting the nozzle with the pump; and a shifting mechanism for shifting the nozzle in horizontal and vertical directions. In the automatic analyzer, the pipe line is at least partially composed of a flexible tube. The flexible tube has an upward or downward convex bending portion in the middle thereof. The convex bending portion changes in position and shifts along with the shifting mechanism at a nozzle side.

Abstract: Disclosed is an automatic analyzer designed so that when it discharges a sample into an empty reaction vessel, the analyzer dispenses the sample without bringing a distal end of a sample probe into contact with a bottom surface of the reaction vessel and can thereby dispense the sample with stable dispensing accuracy in addition to extending lives of the sample probe and the reaction vessel.

Abstract: Disclosed herein is an automatic analyzer that can eliminate the generation of air bubbles of dissolved gas in a liquid circulating in a thermostat bath enabling stable photometry. A degasifier for removing the dissolved gas in the liquid and a bypass passage for ensuring a flow rate required for temperature control of the circulating liquid are provided in a passage for temperature-controlled liquid circulating in the thermostat bath. The automatic analyzer can reduce the dissolved gas concentration to a level at which air bubbles of the dissolved gas in the liquid do not appear while maintaining a flow rate required for temperature control of the liquid circulating in the thermostat bath, thus eliminating air bubbles passing through the light flux during photometry and accordingly enabling stable photometry.

Abstract: Disclosed is an automatic analyzer that includes a reagent vessel for containing a reagent, a pipette probe that has a liquid surface detection function and dispenses a reagent from the reagent vessel, a reaction vessel for containing a reagent that is dispensed from the pipette probe, an analysis mechanism for measuring a reaction between a reagent and a sample within the reaction vessel, a storage means for memorizing liquid surface position information that is acquired by the liquid surface detection function, a liquid surface estimation mechanism for estimating the current liquid surface position in accordance with time-sequential changes in liquid surface information stored by the storage means, and a function for controlling a dispensing operation of the pipette probe in accordance with the result of liquid surface estimation by the liquid surface estimation mechanism.

Abstract: Disclosed is an automatic analyzer that includes a reagent vessel for containing a reagent, a pipette probe that has a liquid surface detection function and dispenses a reagent from the reagent vessel, a reaction vessel for containing a reagent that is dispensed from the pipette probe, an analysis mechanism for measuring a reaction between a reagent and a sample within the reaction vessel, a storage means for memorizing liquid surface position information that is acquired by the liquid surface detection function, a liquid surface estimation mechanism for estimating the current liquid surface position in accordance with time-sequential changes in liquid surface information stored by the storage means, and a function for controlling a dispensing operation of the pipette probe-in accordance with the result of liquid surface estimation by the liquid surface estimation mechanism.