Features: 1. TDS meter measuring principle is to measure the electrical conductivity of water and indirectly reflects the TDS value. 2. Tests impurities in water such as soluble salts, ionic organic compounds, and heavy metal ions, helping provide cleaner water for you and your family. 3. Supports hold function to save measurement results for easy reading and recording. 4. Automatic power-off function turns the device off after 5 minutes of inactivity to conserve battery life. 5. Suitable for use in aquariums, beverages, quality control, fish hatcheries, food processing, laboratories, schools, colleges, and swimming pools. Specification: A TDS meter is a cost-effective and convenient digital tool to instantly check overall water quality, helping provide cleaner water for you and your family. Features: - TDS meter measures electrical conductivity of water to indirectly determine TDS value. - Tests impurities such as soluble salts, ionic organic compounds, and heavy metal ions. - Hold function preserves measurement readings for easy viewing and recording. - Automatically powers off after 5 minutes of non-use to save energy. - Ideal for aquariums, beverage production, quality control, fish hatcheries, food processing, laboratories, educational institutions, and swimming pools. How to Use: 1. Remove the protective cap and press the ON/OFF button to turn on the device. 2. Immerse the probe into the test solution, ensuring the liquid level does not exceed 4 cm from the probe tip. 3. Gently stir the probe in the solution until the reading stabilizes. 4. After use, wipe the probe dry with a cloth and replace the protective cap for storage. Specifications: - TDS Range: 0–9990 ppm - Temperature Range: 0–99°C - Accuracy: ±2% - Battery Type: 2 x 1.5V LR44 button batteries (not included) - Dimensions: Approx. 15.5 x 3 x 1.8 cm (6.1 x 1.18 x 0.71 in) - Weight: Approx. 70g Package Included: 1 x TDS Tester Note: 1. TDS (Total Dissolved Solids) measures the total concentration of dissolved inorganic and organic substances in water in molecular, ionized, or micro-granular form. 2. TDS readings are affected by temperature. For accurate results, allow the device to stabilize and use the hold function to lock the reading. 3. A higher TDS value indicates more dissolved solids in water, while a lower value indicates fewer dissolved solids and purer water.