High-performance expert portable meter (IP67) for measurements of dissolved O2 (DO) and biological O2 demand in the lab, production and in the field. - High-resolution multi-functional backlight display. - Selectable acoustical and optical status indication / report. - Comprehensive GxP support with ISM®, expert- and user-mode. - Water-tight micro-USB connection for simple data transfer. - Operating menu with 12 selectable languages. - Data logger for 2000 data sets. - 2-point-calibration, 1 pre-defined standard. - Automatic, time interval- or manual data logging. - Very easy to use (user-mode). - Water- and dustproof (IP67). High-performance expert portable meter (IP67) for measurements of dissolved O2 (DO) and biological O2 demand in the lab, production and in the field. - High-resolution multi-functional backlight display. - Selectable acoustical and optical status indication / report. - Comprehensive GxP support with ISM®, expert- and user-mode. - Water-tight micro-USB connection for simple data transfer. - Operating menu with 12 selectable languages. - Data logger for 2000 data sets. - 2-point-calibration, 1 pre-defined standard. - Automatic, time interval- or manual data logging. - Very easy to use (user-mode). - Water- and dustproof (IP67).