| Name | Multiparameter Bluetooth® Portable pH/EC/Turbidity/OPDO® Meter – HI98594 |
| pH / mV Range | 0.00 to 14.00 pH* / ±600.0 mV |
| pH / mV Resolution | 0.01 pH / 0.1 mV |
| pH / mV Accuracy | ±0.02 pH / ±1.2 mV |
| pH / mV Calibration | •One point using HI9828-20 Quick calibration 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 | ±1.0 mV |
| ORP Calibration | Automatic at one custom point (relative mV) |
| Dissolved Oxygen Range | 0.0 to 500.0 % saturation |
| 0.00 to 50.00 ppm (mg/L) |
| Dissolved Oxygen Resolution | 0.1 % saturation |
| 0.01 ppm (mg/L) |
| Dissolved Oxygen Accuracy | •±1.5 % of reading from 0.0 to 200.0 % saturation |
| •±5 % of reading from 200.0 to 500.0 % saturation |
| •±1.5 % of reading from 0.00 to 20.00 mg/L |
| •±5 % of reading from 20.00 to 50.00 mg/L |
| 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 ) |
| Pressure compensation | Automatic 450 to 850 mmHg |
| EC Range | 0 to 200 mS/cm |
| 0 to 400 mS/cm (absolute) |
| EC 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 |
| EC Accuracy | ±1 % of reading or ±1 μS/cm, whichever is greater |
| EC Calibration | •One point using HI9828-20 Quick calibration 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 |
| 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 |
| TDS Range* | 0 to 400000 ppm (mg/L) |
| (the maximum value depends on the TDS factor) |
| 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 (g/L) |
| 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) |
| TDS Accuracy | ±1 % of reading or ±1 ppm (mg/L), whichever is greater |
| TDS Calilbration | 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/td> | Automatic |
| Up to three points using 0 FNU, 20 FNU, 200 FNU, and a |
| custom |
| Atmospheric pressure Range | 450.0 to 850.0 mmHg |
| 17.72 to 33.46 inHg |
| 600.0 to 1133.2 mbar |
| Atmospheric pressure Resolution | 0.1 mmHg |
| 0.01 inHg |
| 0.1 mbar |
| Atmospheric pressure Accuracy | ±3.0 mmHg within ±15 °C from calibration temperature |
| Atmospheric pressure Calibration | Automatic at one custom point |
| Temperature Range | −5.00 to 50.00 °C |
| 23.00 to 122.00 °F |
| 268.15 to 323.15 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 |
| Additional specifications – Temperature compensation | Automatic |
| Additional specifications – Logging memory | •Interval logging 50000 records |
| •Log-on-demand (all parameters) 20000 records |
| Additional specifications – Logging interval | 1 second to 3 hours |
| Additional specifications – USB-C (Host) functions | Mass-storage host |
| Additional specifications – USB-C (Device) functions | Mass-storage device |
| Additional specifications – Protection rating | IP67 |
| Additional specifications – Environment | 0 to 50 °C (32 to 122 °F); RH 100 % |
| Additional specifications – Battery type | 4 x 1.5 V AA alkaline batteries |
| 1 x internal, Li-ion rechargeable battery |
| Additional specifications – Battery life | ≈ 126 hours |
| 90 hours using alkaline AA batteries |
| 36 hours using Li-ion battery** |
| Additional specifications – Dimensions | 185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”) |
| Additional specifications – Weight | 435 g (13.3 oz) |