BrandDD-LABCountry of OriginMade in IndiaModel NumberHI5421Oxygen Dissolved Range0.00 to 90.00 ppm (mg/L); 0.0 to 600.0 % saturationOxygen Dissolved Resolution0.01 ppm (mg/L); 0.1% saturationOxygen Dissolved Accuracy+-1.5% of reading +-1 digitOxygen Dissolved CalibrationAutomatic using single or two-point calibration; user calibration single pointOxygen Dissolved Temperature Compensation0.0 to 50.0 deg C; 32.0 to 122.0 deg F; 237.1 to 323.1 KSalinity Compensation0.0 to 70.0 % / 0.0 to 45.0 g/L / 0.0 to 42.0 psuDO ProbeHI76483 Polarographic DO Probe with built-in temperature sensor (included)Logging TypeUp to 100 lots; 50,000 records max./lot, maximum 100,000 data points; 5000 samples/lot for ManualLogging MemoryMaximum 100,000 data pointsLogging Interval14 selectable between 1 second and 180 minutesConnectivityOpto-isolated USBGLPLast calibration data, calibration infoDisplayColor graphic LCD with on-screen help, graphing, and custom color configurationPower Supply12 VDC adapter (included)Environment0 to 50 deg C (32 to 122 deg F; 273 to 323 K), RH max 95% non-condensingDimensions160 x 231 x 94 mm (6.3 x 9.1 x 3.7 Inch)Weight1.2 Kg