Technical Parameters

pH

• Range: 0.00 to 14.00 pH
• Resolution: 0.01 pH
• Accuracy: ±0.02 pH

mV (pH Input)

• Range: ±600.0 mV
• Resolution: 0.1 mV
• Accuracy: ±0.5 mV

ORP

• Range: ±2000.0 mV
• Resolution: 0.1 mV
• Accuracy: ±1.0 mV

Dissolved Oxygen

• Range: 0.0 to 500.0% / 0.00 to 50.00 mg/L
• Resolution: 0.1% / 0.01 mg/L
• Accuracy: 0.0–300.0%: ±1.5% of reading or ±1.0% whichever is greater; 300.0–500.0%: ±3% of reading; 0.00–30.00 mg/L: ±1.5% of reading or 0.10 mg/L whichever is greater; 30.00–50.00 mg/L: ±3% of reading

Conductivity

• Range: 0.000 to 200.000 mS/cm (absolute EC up to 400 mS/cm)
• Resolution: Manual — 1 µS/cm, 0.001 mS/cm, 0.01 mS/cm, 0.1 mS/cm, 1 mS/cm; Automatic µS/cm — 1 µS/cm (0–9999 µS/cm), 0.01 mS/cm (10.00–99.99 mS/cm), 0.1 mS/cm (100.0–400.0 mS/cm); Automatic mS/cm — 0.001 mS/cm (0.000–9.999 mS/cm), 0.01 mS/cm (10.00–99.99 mS/cm), 0.1 mS/cm (100.0–400.0 mS/cm)
• Accuracy: ±1% of reading or ±1 µS/cm, whichever is greater

Resistivity

• Range: 0 to 999,999 Ω·cm; 0 to 1000.0 kΩ·cm; 0 to 1.0000 MΩ·cm
• Resolution: Dependent on resistivity reading

TDS

• Range: 0 to 400,000 mg/L or ppm (max value depends on TDS factor)
• Resolution: Manual — 1 mg/L (ppm), 0.001/0.01/0.1/1 g/L (ppt); Autorange mg/L (ppm) — 1 mg/L (0–9999), 0.01 g/L (10.00–99.99), 0.1 g/L (100.0–400.0); Autorange g/L (ppt) — 0.001 g/L (0.000–9.999), 0.01 g/L (10.00–99.99), 0.1 g/L (100.0–400.0)
• Accuracy: ±1% of reading or ±1 mg/L (ppm), whichever is greater

Salinity

• Range: 0.00 to 70.00 PSU (Extended Practical Salinity Scale)
• Resolution: 0.01 PSU
• Accuracy: ±2% of reading or 0.01 PSU, whichever is greater

Seawater Specific Gravity

• Range: 0.0 to 50.0 σt, σ0, σ15
• Resolution: 0.1 σt, σ0, σ15
• Accuracy: ±1 σt, σ0, σ15

Atmospheric Pressure

• Range: 450–850 mmHg; 17.72–33.46 inHg; 600.0–1133.2 mbar; 8.702–16.436 psi; 0.5921–1.1184 atm; 60.00–113.32 kPa
• Resolution: 0.1 mmHg; 0.01 inHg; 0.1 mbar; 0.001 psi; 0.0001 atm; 0.01 kPa
• Accuracy: ±3 mmHg within ±15°C from the calibration temperature

Temperature

• Range: -5.00 to 55.00°C; 23.00 to 131.00°F; 268.15 to 328.15K
• Resolution: 0.01°C; 0.01°F; 0.01K
• Accuracy: ±0.15°C; ±0.27°F; ±0.15K

Calibration

• pH: Automatic one, two, or three points with five memorized standard buffers (pH 4.01, 6.86, 7.01, 9.18, 10.01) or one custom buffer
• ORP: Automatic at one custom point
• Conductivity: Automatic one point with six memorized standards (84 µS/cm, 1413 µS/cm, 5.00 mS/cm, 12.88 mS/cm, 80.0 mS/cm, 111.8 mS/cm) or custom point
• DO: Automatic one or two points at 0, 100%, or one custom point
• Resistivity, TDS, σ: Based on conductivity or salinity calibration
• Salinity: One custom point
• Atm. Pressure, Temperature: Automatic at one custom point

Other Specifications

• Temperature Compensation: Automatic from -5 to 55°C (23 to 131°F)
• Logging Memory: Up to 60,000 samples with 13 measurements each; up to 45,000 samples with 15 measurements each (GPS)
• Logging Interval: 1 second to 3 hours
• Computer Interface: USB (with HI 929829 software)
• Waterproof Protection: Meter IP67, probe IP68
• Environment: 0 to 50°C (32 to 122°F); RH 100%
• Power Supply: 1.5V alkaline C cells ×4 (approx. 150 hours continuous use without backlight) / 1.2V rechargeable C cells ×4 (approx. 70 hours continuous use without backlight)
• Dimensions: 221 × 115 × 55mm (8.7 × 4.5 × 2.2″) / 270 × 46mm DIA (10.6 × 1.8″ DIA)
• Weight: Meter: 750g (26.5 oz.); Probe: 750g (26.5 oz.)