TDS meter - Drinking water quality tester - High precision - Measuring range: 0-9999 ppm - Digital purity tester for swimming pools, spas, aquariums

【Wide Application】: The TDS tester can be widely used in water purifiers and filters, food (vegetables, fruits) and beverage quality control, swimming pools and spas, aquariums, hydroponics, etc.【Three Test Modes】: The TDS meter measures the conductivity of water, which indirectly reflects the TDS value. The hold function allows you to save, read, and record measurement results. Three test modes: ON/OFF is the switch button, HOLD is the lock button, and TEMP is the mode button, which can be customized to individual needs.【Easy to Use】: The TDS tester can detect certain impurities in water, such as soluble salts, ionic organic compounds, heavy metal ions, etc., providing you and your family with greater convenience in obtaining cleaner water. No matter where you are—traveling, playing, or shopping—check the TDS value of your water anytime with a measurement accuracy of ±2%. [Auto-off function]: If no operation is performed for 5 minutes, the TDS tester will automatically turn off to save power and prevent the battery from draining. [Measuring range]: 0-9990 ppm, resolution is 1 ppm. From 1000 to 9990 ppm, resolution is 10 ppm. Note: The TDS pen cannot be used to measure high-temperature water (such as hot water) or water that has been vigorously shaken.