TEST YOUR WATER PURITY: Use this TDS water meter to test water purity. Insert the device to a depth of approximately 1 inch into water, and the tester will display the total dissolved solids level in ppm (parts per million) on the screen.3 IN 1 FUNCTION: This device measures TDS, EC, and temperature for comprehensive water analysis.ACCURATE AND WIDE MEASUREMENT RANGE: Features a high-quality titanium alloy probe for improved accuracy. Automatic temperature compensation (ATC) ensures reliable readings across varying temperatures. Measurement range: 10009990 ppm, with a resolution of 10 ppm. A flashing "x10" indicator is displayed when applicable.EASY TO USE AND CONVENIENT: Remove the protective cap, press the power button, and submerge the meter into water (up to 4 cm). Wait for the reading to stabilize. The device automatically locks the reading and displays it on the backlit LCD screen. The meter powers off after 2 minutes of inactivity to conserve battery. Includes a hold function to save measurements for easy reading and recording.Note: Measurements are taken manually. Allow for a 13 cm margin of error. Variations in lighting and screen display may cause slight color differences. Product received may vary slightly from images shown.