| Model | KL-139A | KL-139B |
| Measuring range | 0~1999mg/L(ppm) | |
| Accuracy | ±2℅F·S | |
| Resolution | 1mg/L(ppm) | |
| Display | 4-digital LCD | |
| Environment | Humidity:≤95℅ | |
| Automatic Temperature Compensation | 0℃~50℃ | |
| Power Supply | 4×1.5V(AG13) | |
| Dimensions | 165mm×26mm×26mm | 60mm×55mm×23mm |
| Weight | 63g | 60g |

