Dual channel hand meter for measurements of pH, mV, relative mV, ion concentration and dissolved oxygen. - Intelligent sensor management (ISM®). - Full GxP support: simple, safe operation. - 5 point pH calibration with 7 predefined and one user-defined buffer set. - Data memory of 500 GLP data sets with date / time, sensors-ID and SN, user- and sample-ID. - Wireless IR communication. - Large graphical display with backlight. Dual channel hand meter for measurements of pH, mV, relative mV, ion concentration and dissolved oxygen. - Intelligent sensor management (ISM®). - Full GxP support: simple, safe operation. - 5 point pH calibration with 7 predefined and one user-defined buffer set. - Data memory of 500 GLP data sets with date / time, sensors-ID and SN, user- and sample-ID. - Wireless IR communication. - Large graphical display with backlight.