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KL-310/311/300/301 Conductivity/TDS Meter Model KL-310 KL-311 KL-300 KL-301 Measuring Range 0~999 μS/cm 0~9990 μS/cm 0~999 (mg/L) ppm 0~9990 (mg/L) ppm Accuracy ±2% F.S. ±2% F.S. ±2% F.S. ±2% F.S. Resolution 1 μS/cm 10 μS/cm 1 ppm 10 ppm Automatic Temperature Compensation 0℃~50℃ Operating Environment Temperature: 0℃~50℃; Relative Humidity <95% Battery 3×1.5V (AG13) Dimensions 150mm×29mm×15mm Weight 51g