Sensor Specifications with Field Cable:

Temperature (Thermistor)
[Units: °C, °F, K]

• Range: -5 to 70 °C
• Resolution: 0.1 °C
• Accuracy: ±0.2 °C;
  ±0.3 °C cables over 45 m
• Calibration: N/A

pH (Glass Combination Electrode)
[Units: mV, pH units]

• Range: 0 to 14 units
• Resolution: .01 units
• Accuracy: ±0.2 units
• Calibration: 1, 2, or 3 point (user selectable); US, NIST or Custom Buffers

ORP (Platinum Button)
[Units: mV]

• Range: 1999 to 1999 mV
• Resolution: 0.1 mV
• Accuracy: ±20 mV in redox standards
• Calibration: 1 point

Dissolved Oxygen (Polarographic or Galvanic)
[Units: % Saturation | temp comp range -5 to 50 °C]

• Range: 0 to 500%
• Resolution: 0.1% or 1% air saturation (user selectable)
• Accuracy: 0 to 200%: ±2% of reading or
  2% air saturation, w.i.g.
  200 to 500%: ±6% of reading
• Calibration: 1 or 2 point with zero

[Units: mg/L, ppm | temp comp range -5 to 50 °C]

• Range: 0 to 50 mg/L
• Resolution: 0.1% air saturation
• Accuracy: 0 to 20 mg/L: ±2% of reading or
  0.2 mg/L, w.i.g.
  20 to 50 mg/L: ±6% of reading
  0.1% or 0.01 mg/L (user selectable)
• Calibration: N/A

Conductivity/Specific Conductance (Four Electrode Cell)
[Units: μS, mS]

• Range: 0 to 200 mS/cm (auto-range)
• Resolution: Range dependent
• Accuracy: ±0.5% of reading or 0.001 mS/cm, w.i.g
• Calibration: 1 point

Total Dissolved Solids/TDS (Calculated)
[Units: mg/L, kg/L, g/L]

• Range: 0 to 100 g/L; TDS constant range
  0.3 to 1.0 (0.65 default)
• Resolution: 0.001, 0.01, .01 g/L
• Accuracy: No stated accuracy spec
• Calibration: N/A

Meter Specifications: 

Barometer:

• Range: 375 to 825 mmHg
• Accuracy: ±1.5 mmHg from 0 to 50 °C
• Resolution: 0.1 mmHg

Cable: 4 meters

Certifications: RoHS, CE, FCC

Display: Backlit, graphic display

Logging Capabilities: Single point or continuous with autostable feature

Memory: 5000 datasets; 50 unique data identifiers

Operating Temperature: -10 to 60 °C

Power: 2 alkaline C-cells provide 80 continuous hours at ambient temperature without backlight; USB power or optional wall power can be supplied via micro USB port

Response Time: 2.0 mil PE = 17 seconds and 3 in/sec flow, 1.25 mil PE = 8 seconds and 6 in/sec flow, 1 mil Teflon® = 18 seconds and 12 in/sec flow

Size: 3.25 in. width x 8.5 in. length x 2.25 in. depth

Storage Temperature: -20 to 70 °C

USB: Built-in micro USB port for on-the-go data exports via direct connection to the included USB stick

Waterproof: IP-67 (even with battery cover off); floats

Weight: 1.05 lbs. with batteries