Provided is fluid control equipment for bio-reaction, including a pipette configured to transport a reaction solution, and a liquid pump configured to adjust the internal pressure of the pipette.

Described herein are systems and methods used for washing needle assemblies with multiple needles.

Described herein are systems and methods used for washing needle assemblies with multiple needles.

A flow path washing method and apparatus for an auto sampler in which, when a cleaning fluid supplied to a flow path which is switched between a first flow path including a nozzle for aspirating a sample and a sample loop for holding the aspirated sample, and a second flow path including a washing tub for washing at least an outer wall of the nozzle, a control unit changes a flow velocity of the cleaning fluid supplied between measurement of a first measurement item and measurement of a second measurement item based on washing information showing washing patterns corresponding to measurement items of the sample, including at least one of first washing information showing a washing pattern corresponding to the first measurement item of the sample and second washing information showing a washing pattern corresponding to the second measurement item to be measured subsequent to the first measurement item.