Digital Tester TDS TEMP EC Meter Water Purity Hydroponics High Quality Test Pen

Tds: 0-9999 Ppm; Conductivity: 0-9999 Μs/cm; Temperature: 0.1-80.0°c/ 32.0-176.0°f; Accuracy: ± 2%. Tds : 0-9999 Ppm. - Test Water Quality Purity, Check The Performance Of Your Water Filter, Check For Hardness To Make Sure You Always Drink Pure Water!

eBay