Ensures of your drinking water with our high Water Quality Tester Pen, design to quickly and accurately measure total dissolved solids levels. Featuring a user friendly design, this pen requires not professional knowledge—simply immerses the probes in water for real time data on a clearly digital display. Ideal for family concerned about drinking water , aquariums enthusiasts maintaining fish health, outdoor adventurers needing reliability water sources, and professional in water industry. Perfect for home use to monitor tap or bottled water quality, managing swimming pool , maintaining aquariums , and testing natural water sources during travel. With its lightweight design, this meter is builts for convenience and durability, offering automatic calibration and waterproof to ensures accurate result every time.