included:YSI3500waterqualitymonitorwithinstructions.YSI3550samplechamberwithinstructions.YSI3520flow-throughconductivitycellwithinstructions.YSI3530pHelectrodeassemblies(2ea.) withinstructions.YSI3570recorderinterfacecableassemblywithinstructions.YSI1010tempprobes(2ea).YSI3555O-ringmaintenancekit.OEMCarryingcasewithkeys.pH电极工况不明