FlexStation P4 is a fully automatic liquid workstation produced by ASHMAR, also known as the "standard instrument", which integrates automatic standard solution collection, automatic transfer, automatic dilution, automatic mixing, automatic distribution, automatic Tip head replacement and other functions, greatly improving the efficiency of experimental liquid distribution and liquid preparation accuracy. All operations of the equipment are automatically completed under transparent and closed conditions, and the system is equipped with a constant temperature control unit, so as to avoid solvent volatilization and ensure the safety of experimental personnel.