| Model | EC-250 | EC-270 |
| Measutring Range cond. | 0,1 μS - 200,0 μS | 0,05 μS - 500,0 μS |
| Accuracy | 1% Full scale, +/-1 digit | 1% Full scale, +/-1 digit |
| Calibration | Up to 5-point | Up to 6-point |
| Measuring range temp. (°C) | 0,0 - 100,0 | 0,0 - 100,0 |
| Accuracy pH | 0,1 | 0,1 |
| Measuring range TDS | 0,1 mg/l - 200g | 0,05 mg/l - 500g |
| Accuracy TDS | 1% Full scale, +/-1 digit | 1% Full scale, +/-1 digit |
| Power | AC-adapter, 9V DC | AC-adapter, 9V DC |
| Input conductivity cell | 8 Pin DIN | 8 Pin DIN |