6 in 1 Multi-parameter Water Quality Tester Type-C Rechargeable Water Test Pen with Dual LCD Backlight Display for Hydroponics Aquarium Pool

The YY-1066S is a multifunctional water quality test pen that simultaneously measures pH, TDS, EC, ORP, H2 hydrogen, salinity, and temperature. Built with high-precision sensors, a dual LCD backlight display, and USB Type-C rechargeable battery, it offers easy one-key calibration and data hold functionality. Ideal for hydrogen-rich water, hydroponics, aquarium fish tanks, swimming pools, drinking water, seawater, and spa water testing. Its portable pen design with ℃/℉ switchable units makes it an ideal water quality analysis instrument for both home and commercial use.

• 6-in-1 multi-parameter testing: pH / TDS / EC / ORP / H2 Hydrogen / Salinity + Temperature display
• Dual LCD backlight screen for clear readings, showing two groups of data simultaneously
• Type-C USB rechargeable — no frequent battery replacement, eco-friendly
• One-key automatic calibration and HOLD function to lock readings for easy operation
• High-sensitivity glass pH sensor for stable and accurate test results
• ℃ / ℉ temperature unit switchable, with multiple units for TDS and salinity
• Portable pen shape with waterproof probe and compact size for field testing
• Wide application: hydrogen water, hydroponic planting, aquarium, pool, drinking water, aquaculture

• Hydrogen-rich water testing
• Hydroponics growing systems
• Aquarium & fish tanks
• Swimming pools
• Spa water
• Drinking water
• Seawater aquaculture
• Water treatment labs
• Water quality monitoring

• 1 × YY-1066S Water Quality Tester Pen
• 1 × USB Charging Cable
• 1 × User Manual