TDS & EC Water Quality Tester, Portable Digital Test Pen with Hold Function & Anti-Slip Design for Home Drinking Water & Aquarium
Digital TDS EC Water Quality Tester Pen, Rechargeable with Titanium Alloy Probe, Dual Color Backlight, IP67 Waterproof, High Precision Meter for Home Drinking Water Testing
7-in-1 Water Quality Tester Pen, pH/TDS/EC/ORP/Salt/S.G/Temperature Meter for Drinking Water, Aquarium, Swimming Pool & Hydroponics
4-in-1 Water Quality Tester Pen, pH/TDS/EC/Temperature Meter with Backlight Display, IP65 Waterproof, for Drinking Water, Aquarium & Hydroponics
7-in-1 Water Quality Tester, High Precision pH/ORP/TDS/EC/Salinity/S.G/Temperature Meter, Portable Digital Test Pen for Aquarium, Hydroponics & Home Use
5-in-1 Bluetooth Water Quality Tester, PH/TDS/EC/Salinity/Temperature Meter with APP Control for Aquarium, Hydroponics & Home Use
