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Contact Supplier| Specifications | |||
| Model | LI-143 Auto Temp. | LI-139 Table Model | LI-136 Portable Model |
| Display | 3 1/2 digit LED | 3 1/2 digit LED | 3 1/2 digit LCD |
| Range | 0 to 14.00 pH 0 to + 1999 mV | 0 to 14.00 pH 0 to + 1999 mV | 0 to 14.00 pH |
| Resolution | 0.01 pH 1 mV | 0.01 pH 1 mV | 0.01 pH |
| Accuracy | + 0.01 pH + 1 mV | + 0.01 pH + 1 mV | + 0.01 pH |
| Temperature | Auto 0 to 100 degree | 0 | 0 |
| Compensation | Manual 0 to 100 degree (ATC) | Manual 0 to 100 degree | Manual 0 to 100 degree |
| Slope Correction | 80 to 120% | 80 to 120% | 80 to 120% |
| Power | 230V + 10% | 230V + 10% | 1 x 9V Battery |
| Dimensions | 275 x 175 X 76 mm | 275 x 175 X 76 mm | 165 x 85 X 28 mm |