TDS Meter The TDS-3 Handheld TDS Meter is a useful tool to spot check the TDS of your home water supply or RO/DI unit output. This unit features a digital display, built in thermometer, and comes with a carrying case. Color as shown in the image. (Colors may vary slightly as the image brightness and contrast differs) Product Features Test the quality of various water ensuring you are enjoying the best quality water. Ideal for using in the following situations: drinking water water filters hydroponics aquariums food&coffee pools&spas. TDS range: 1-9999PPM/mg / L. Auto shut-off: 10 minutes. Data hold. Auto temperature compensation. Accuracy: ï¿½2%. Dimensions: 14.2*2.3*1.3(CM) Come with a leather case.