● User management: Administrator/user/visitor 3 level control. (DDS-421 only)

● Calibration management: 1 to 3 PTS constant calibration;

1 PT conversion coefficient calibration;

constant and TDS conversion coefficient setting.

● Data management: Store up to 1500 data points.

● Printing management: Real-time/historical data printing compliant with GLP standards.

● Helper function: Click on "?" anytime to view the operation manual

● 7"/4.3" color TFT Touchscreen with Metro display, EN lanague.

● Support conductivity, resistivity, TDS, salinity, temperature measurement mode.

● Automatic frequency and range switching.