he M-series ultrapure water machine takes urban tap water (pure water) as the water source, and it can conveniently and quickly produce Grade II RO reverse osmosis water (DI deionized water) and UP ultrapure water. It adopts an optimized standard two-stage reverse osmosis process: dual pumps, dual membranes, and a transition water tank, which makes the system consume less energy, generate less wastewater, and ensures more stable water production quality. Even under the working condition where the source water quality is poor, the conductivity of the secondary RO produced water can still be stably maintained at 1-5μs/cm.