(1) Testing items are flexibly optional: K⁺ Na⁺ Cl^- Ca²⁺pH
(2) Results are shown within 30 seconds after the sampling
(3) Entire segmentation and washing are automatic to ensure no cross-contamination
(4) Double parameters of slope and mean deviation are corrected to ensure linearity and accuracy
(5) Calibration solution and waste solution are contained in the closed containers, which reduces the risk of biological pollution and meets environmental protection requirements