KL-1393 TDS Tester Technical Specification: Measuring range:0~19.99ppt Accuracy:+/-2℅F稴 Resolution:0.01ppt Display:4-digital LCD Envionment Humidity≤95℅ Automatic Temperature Compensation:0℃~50℃ Power Supply:2x3V(CR2032 Battery) Dimensions:150x27x20(mm3) Weight:46g