Digital TDS Meter 0-1999PPM Water Quality Monitor Tester Dual Way High Level Probe 1mg/L PPM Accuracy +/-2% Features: Wide screen digital display design Switchable comparison of TDS values of two liquids Can be connected to a water pipe or a water dispenser to measure two parameters of influent and effluent This product can be wall-mounted or embedded, easy to install and operate, and is a supporting instrument for many water dispenser manufacturers. Specifications: Automatic Temperature Compensation:OC ~50C Resolution1mg/L (ppm) Battery Type:4*1.5V(AG13) (Not included!!) Dimensions(mm):60x55X23 Weight 98g Accuracy:2%F.S Measuring Range: 0~ 1999mg/L (ppm) Resolution:1mg/L(ppm) Note: Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Please allow 1-3mm slight deviation due to manual measurement. Thank you! Package included: 1 Set TDS Meter