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The Oakton Waterproof pH/DO 300 pH/Conductivity/TDS/C/F Meter has separate pH and conductivity/TDS probes allowing for greater flexibility. Features include: automatic pH buffer recognition, auto ranging for conductivity/TDS measurements, auto-off, HOLD, and selectable temperature (°C or °F).

Specifications:
- Range (pH): -2.00 to 16.00
- Range (Conductivity): 0 to 199.9 mS
- Range (TDS): 0 to 200 ppt
- Range (Temperature °C): -10 to 110
- Range (Temperature °F): 14 to 230
- Resolution (pH): 0.1/0.01
- Resolution (Temperature): 0.1
- Resolution (Conductivity): 0.01, 0.1 µS; 0.001, 0.01, 0.1 mS
- Resolution (TDS): 0.01, 0.1 ppm, 0.001, 0.01, 0.1 ppt
- Accuracy (pH): ±0.01 pH
- Accuracy (Temperature): ±0.5°C
- Accuracy (Conductivity): ±1% full-scale
- Accuracy (TDS): ±1% of reading
- Temperature compensation: Automatic or manual
- Display: LCD
- Calibration: Up to 5 points
- Waterproof: Yes
- Buffer recognition: USA, NIST
- Power: Four AAA batteries (included)
- CE Compliance: Yes
- Dimensions (" H): 3-1/2
- Dimensions (" D): 1-3/4
- Dimensions (" L): 7-1/2