| pH/mV Range | 0.00 to 14.00 pH, ±600.0 mV |
| pH/mV Resolution | 0.01 pH, 0.1 mV |
| pH/mV Accuracy* | ±0.05 pH, ±3.0 mV |
| pH/mV Calibration | • One point, using HI9828-20 Quick calibration standard solution
• Up to three points, using pH 4.01, pH 6.86, pH 7.01, pH 9.18, pH 10.01 standard buffers and one custom buffer |
| ORP Range | ±2000.0 mV |
| ORP Resolution | 0.1 mV |
| ORP Accuracy* | ±10.0 mV |
| ORP Calibration | Automatic at one custom point (relative mV) |
| Dissolved Oxygen (DO) Range | 0.0 to 500.0 % saturation, 0.00 to 50.00 ppm (mg/L) |
| Dissolved Oxygen (DO) Resolution | 0.1 % saturation, 0.01 ppm (mg/L) |
| Dissolved Oxygen (DO) Accuracy* | • 0.0 to 300.0 %: ±1.5 % of reading or ±1.0 % whichever is greater
• 300.0 to 500.0 %: ±3 % of reading
• 0.00 to 30.00 ppm (mg/L): ±1.5 % of reading or ±0.10 ppm (mg/L) whichever is greater
• 30.00 ppm (mg/L) to 50 ppm (mg/L): ±3 % of reading |
| Dissolved Oxygen (DO) Calibration | • One point, quick calibration in water-saturated air
• One or two points, at 100 % and 0 %
• One point, using a custom solution (% saturation or mg/L) |
| Dissolved Oxygen (DO) Pressure Compensation | Automatic; 450 to 850 mmHg |
| Conductivity Range | 0 to 200 mS/cm (0 to 400 mS/cm absolute) |
| Conductivity Resolution | • Manual: 1 μS/cm; 0.001 mS/cm; 0.01 mS/cm; 0.1 mS/cm; 1 mS/cm
• Automatic: 1 μS/cm from 0 to 9999 μS/cm; 0.01 mS/cm from 10.00 to 99.99 mS/cm; 0.1 mS/cm from 100.0 to 400.0 mS/cm
• Automatic (mS/cm): 0.001 mS/cm from 0.000 to 9.999 mS/cm; 0.01 mS/cm from 10.00 to 99.99 mS/cm; 0.1 mS/cm from 100.0 to 400.0 mS/cm |
| Conductivity Accuracy* | ±1 % of reading or ±1 μS/cm, whichever is greater |
| Conductivity Calibration | • One point, using HI9828-20 Quick calibration standard solution
• One point, using 84 μS/cm, 1413 μS/cm, 5.00 mS/cm, 12.88 mS/cm, 80.0 mS/cm, 111.8 mS/cm standard solutions or custom point |
| Resistivity Range | 0 to 999999 Ω·cm; 0 to 1000.0 kΩ·cm (depending on reading); 0 to 1.0000 MΩ·cm |
| Resistivity Resolution | 1 Ω·cm; 0.1 kΩ·cm; 0.0001 MΩ·cm |
| Resistivity Calibration | Based on conductivity calibration |
| Total Dissolved Solids (TDS) Range | 0 to 400000 ppm (mg/L) (Maximum value depends on the TDS factor) |
| Total Dissolved Solids (TDS) Resolution | • Manual: 1 ppm (mg/L); 0.001 ppt (g/L); 0.01 ppt (g/L); 0.1 ppt (g/L); 1 ppt (g/L)
• Automatic: 1 ppm (mg/L) from 0 to 9999 ppm (mg/L); 0.01 ppt (g/L) from 10.00 to 99.99 ppt (g/L); 0.1 ppt (g/L) from 100.0 to 400.0 ppt (g/L)
• Automatic (ppt): 0.001 ppt (g/L) from 0.000 to 9.999 ppt (g/L); 0.01 ppt (g/L) from 10.00 to 99.99 ppt (g/L); 0.1 ppt (g/L) from 100.0 to 400.0 ppt (g/L) |
| Total Dissolved Solids (TDS) Accuracy | ±1 % of reading or ±1 ppm (mg/L), whichever is greater |
| Total Dissolved Solids (TDS) Calibration | Based on conductivity or salinity calibration |
| Salinity Range | 0.00 to 70.00 PSU |
| Salinity Resolution | 0.01 PSU |
| Salinity Accuracy | ±2% of reading or ±0.01 PSU, whichever is greater |
| Salinity Calibration | One point, using a custom solution |
| Seawater Sigma Range | 0.0 to 50.0 σt, σ0, σ15 |
| Seawater Sigma Resolution | 0.1 σt, σ0, σ15 |
| Seawater Sigma Accuracy | ±1.0 σt, σ0, σ15 |
| Seawater Sigma Calibration | Based on conductivity or salinity calibration |
| Turbidity Range | 0.0 to 99.9 FNU, 100 to 1000 FNU |
| Turbidity Resolution | 0.1 FNU from 0.0 to 99.9 FNU, 1 FNU from 100 to 1000 FNU |
| Turbidity Accuracy* | ±0.3 FNU or ±2 % of reading, whichever is greater |
| Turbidity Calibration | Automatic; Up to three points, using 0 FNU, 20 FNU, 200 FNU, or custom |
| Atmospheric Pressure Range | 450.0 to 850.0 mmHg, 17.72 to 33.46 inHg, 600.0 to 1133.2 mbar, 8.702 to 16.436 psi, 0.5921 to 1.1184 atm, 60.00 to 113.32 kPa |
| Atmospheric Pressure Resolution | 0.1 mmHg, 0.01 inHg, 0.1 mbar, 0.001 psi, 0.0001 atm, 0.01 kPa |
| Atmospheric Pressure Accuracy | ±3.0 mmHg within ±15 °C from calibration temperature |
| Atmospheric Pressure Calibration | Automatic at one custom point |
| ISE Ammonium-Nitrogen Range | 0.02 to 200.0 ppm Am (as NH4+-N) |
| ISE Ammonium-Nitrogen Resolution | 0.01 ppm to 1.00 ppm, 0.1 ppm to 200.0 ppm |
| ISE Ammonium-Nitrogen Accuracy | ±5 % of reading or 2 ppm, whichever is greater |
| ISE Ammonium-Nitrogen Calibration | 1 or 2 point, 10 ppm and 100 ppm |
| ISE Chloride Range | 0.60 to 200.0 ppm Cl (as Cl-) |
| ISE Chloride Resolution | 0.01 ppm to 1 ppm, 0.1 ppm to 200.0 ppm |
| ISE Chloride Accuracy | ±5 % of reading or 2 ppm, whichever is greater |
| ISE Chloride Calibration | 1 or 2 point, 10 ppm and 100 ppm |
| ISE Nitrate-Nitrogen Range | 0.62 to 200.0 ppm N (as NO3--N) |
| ISE Nitrate-Nitrogen Resolution | 0.01 ppm to 1 ppm, 0.1 ppm to 200 ppm |
| ISE Nitrate-Nitrogen Accuracy | ±5 % of reading or 2 ppm, whichever is greater |
| ISE Nitrate-Nitrogen Calibration | 1 or 2 point, 10 ppm and 100 ppm |
| Temperature Range | −5.00 to 55.00 °C, 23.00 to 131.00 °F, 268.15 to 328.15 K |
| Temperature Resolution | 0.01 °C, 0.01 °F, 0.01 K |
| Temperature Accuracy | ±0.15 °C, ±0.27 °F, ±0.15 K |
| Temperature Calibration | Automatic at one custom point |
| Temperature Compensation | Automatic: −5 to 55 °C, 23 to 131 °F, 268.15 to 328.15 K |
| Logging Memory | • Interval logging: 50000 total records (meter and probe)
• Log-on-demand (all parameters): 15000 total records (meter and probe) |
| Logging Interval | 1 second to 3 hours |
| USB-C (Host) Functions | Mass-storage host |
| USB-C (Device) Functions | Mass-storage device |
| Protection Rating | IP67 |
| Environment | 0 to 50 °C (32 to 122 °F), 100% RH |
| Battery Type | 4 × 1.5 V AA alkaline batteries |
| GPS | 12 channel receiver, 10 m (30 ft) range |
| Dimensions | 185 × 93 × 35.2 mm (7.3 × 3.6 × 1.4 inches) |
| Weight (with batteries) | 435 g (13.3 oz) |
| Notes | * Accuracy is evaluated with a calibrated system at ambient temperature. |
