6-in-1 Portable Digital Pen – Premium Water Quality Tester
Precision-engineered with high-sensitivity sensors for instant, accurate readings of temperature, TDS, EC, specific gravity, salinity, and pH. Durable ABS housing with reinforced tip and IP67 waterproof rating for rugged outdoor use—ideal for aquariums, hydroponics, pool maintenance, and brewing. Ultra-compact pen design (14cm) with auto-calibration and a large LCD display for effortless single-handed operation. Powered by replaceable LR44 batteries (included), featuring auto-off and low-energy tech for extended field use. Lab-grade accuracy meets portability—trusted by professionals for quick water analysis anywhere. Bulk pricing available—stock up for teams or resale with guaranteed wholesale discounts.