- 4-in-1 High-Precision Water Quality Tester: This TDS Meter accurately measures Total Dissolved Solids (TDS), Electrical Conductivity (EC), and water temperature (°C/°F). The large backlit LCD provides clear readings from any angle, even in low-light environments. A red backlight indicates non-drinking water (TDS >40 ppm), while a green backlight signals safe drinking water (TDS ≤40 ppm). - Automatic Shut-Off & Hold Function: The TDS Meter features an automatic shut-off after 2 minutes of inactivity to extend battery life. The hold function allows you to lock in measurements for easy recording, making it user-friendly and efficient for various applications. - High-Precision Sensor for Reliable Accuracy: This water tester is equipped with a premium titanium alloy probe and an intelligent microchip for stable and accurate measurements. Its advanced technology ensures precise results for drinking water, aquariums, and hydroponic systems. - Wide Measuring Range for Versatile Use: The TDS Meter measures from 0 to 9990 PPM, with a resolution of 1 PPM (0-999) and 10 PPM (1000-9990), indicated by a blinking '×10' symbol. It is perfect for testing tap water, well water, swimming pools, hot tubs, aquariums, hydroponics, and RO/RODI systems. Whether you need to ensure your drinking water is safe, monitor your aquarium's conditions, or evaluate your hydroponic setup, this TDS Meter is an essential tool for accurate water quality testing.