TDS Meter Water Quality Tester Quick overview A compact, professional TDS, EC and temperature testing pen for fast water quality checks. Ideal for monitoring tap water, water filters, aquariums, pools and hydroponic solutions. Measures total dissolved solids and conductivity while displaying temperature for simple, reliable assessments. Key benefits Know when to change a water filter by monitoring dissolved solids levels. Verify water quality before use for household tasks, aquariums or gardening. Save and read measurements easily with hold and autolock functions and a large backlit LCD for clear viewing. Features and specifications Functions: TDS, EC and temperature measurement Range: 1 to 9990 ppm Precision: ± 2 to 3 percent Accuracy: 1 ppm Power: 3 V Material: aluminum body for durable, lightweight use Color: white Size: 5.43 x 0.98 inch Display: large backlit LCD for easy reading Useful controls: hold function to save readings, autolock for stable measurement Package contents 1 water quality testing pen Use scenarios Household tap water testing: check TDS before drinking or cooking and confirm filter performance. Aquarium care: monitor TDS and temperature to maintain a stable environment for fish and plants. Hydroponics and pool maintenance: track conductivity and temperature to keep nutrient and pool conditions consistent. Support and reliability Designed for everyday household and laboratory use. If you have questions about operation or specifications, customer support will respond within 24 hours to help resolve issues.