1.DPD100 Meter2.D201T ATC pH probe3.pH buffer solution: pH4.00/7.00/10.01, 50mL, one for each4.DDO01-2M DO probe, cable length: 2m5.DDOS-01 Membrane refill solution: 30mL,1pc6.DDOSC Sensor caps: 3pcs/group, 1pkg7.DF01 Flexible probe holder: 1pc8.DA01 Power adaptor