Four (4) Multiparameter Water Quality Sondes, YSI EXO1 or Equal 3.1.1.1 Must have four (4) universal sensor ports. 3.1.1.2 Must be capable of collecting, logging, and storing parameter data from multiple sensors via self-contained battery supply. Battery must be field replaceable. 3.1.1.3 Must have port/sensor status capability. 3.1.1.4 Must have quality control software to check and validate probe configuration and calibration. 3.1.1.5 Must include proper storage and calibration cup. 3.1.1.6 One Sonde specific software to allow viewing of logged, collected data, graphic display, QA/QC, and basic analysis either via handheld or PC display. 3.1.2 One (1) Field Cable 3.1.2.1 Cable must be a minimum of four (4) meters long. 3.1.3 One (1) Handheld Display 3.1.3.1 Must have wet-mate connectors. 3.1.3.2 Display must have a minimum of IP67 waterproof rating. 3.1.4 Four (4) pH Sensors 3.1.4.1 Must have an accuracy of ±0.2 pH units. 3.1.4.2 Display must be able to show pH millivolts. 3.1.4.3 Must be interchangeable in the field and wet-mateable for easy replacement. 3.1.5 Four (4) Temperature/Conductivity Sensors 3.1.5.1 Temperature accuracy must be ±0.1°C or better. 3.1.5.2 Specific conductivity must have a range at a minimum of 0-200 mS/cm. 3.1.5.3 Display must be able to report in µS/cm. 3.1.5.4 Must be interchangeable in the field and wet-mateable for easy replacement. 3.1.6 Two (2) Optical Dissolved Oxygen Sensors 3.1.6.1 Optical dissolved oxygen sensor must have a field replaceable dissolved oxygen cap...
