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The Oakton Waterproof TDSTestr11+ Multi-range, Cup-style Pocket TDS Tester operates as either a cup-style or dip-style tester for greater flexibility. Features include: Automatically or manually select measuring range; Waterproof, dustproof housings float; Push-button calibration, HOLD function, and error messages.

Specifications:
- Range (Conductivity): 0-2000 ppm
- Resolution (TDS): 0.1, 1 ppm, 0.001, 0.01 ppt
- Accuracy (TDS): ±2% full-scale
- Temperature compensation: Automatic
- Temp range: 32 to 122°F (0 to 50°C)
- Display: LCD
- Calibration: Up to 3 points
- Power: Four 1.5 V batteries
- Battery life: 150 hours
- CE Compliance: Yes
- Dimensions (" L): 6-1/2
- Dimensions (" Dia): 1-1/2
- Temp resolution: 0.1
- Temp accuracy: ±0.9°F (±0.5°C)