Digital TDS Water Quality Tester Pen

Ensure your drinking water is safe and pure with this high-precision Digital TDS Tester Pen. This essential tool measures Total Dissolved Solids (TDS) to determine the purity of your water in seconds. Featuring an HD large LCD screen for easy reading, a simple three-button design (Hold, Temp, On/Off), and an upgraded algorithm for rapid results, it’s perfect for testing tap water, RO systems, aquariums, and pools.