7-in-1 Digital Water Quality Tester Pen for pH, ORP, TDS, EC, Salinity, SG & Temperature

Take complete control over liquid analysis, chemical balance, and water purity with this 7-in-1 Digital Water Quality Tester Pen. Engineered for professional water testing, this multi-functional meter measures seven critical parameters in a single compact device: pH, Oxidation-Reduction Potential (ORP), Total Dissolved Solids (TDS), Electrical Conductivity (EC), Salinity, Specific Gravity (SG), and Temperature. Featuring a high-sensitivity glass probe, Automatic Temperature Compensation (ATC), and a clear backlit digital LCD display, it provides rapid, laboratory-grade measurements without needing multiple standalone meters. Perfect for saltwater aquariums, marine reef tanks, hydroponic nutrient systems, swimming pools, spas, drinking water filters, and aquaculture setups.

Key Features

• 7-in-1 Multi-Parameter Diagnostics: Simultaneously tests pH, ORP, TDS, EC, Salinity, Specific Gravity (SG), and Temperature for complete liquid analysis.

• Saltwater & Reef Tank Salinity / SG Measurement: Accurately measures salinity levels and relative density for marine aquariums, reef tanks, and koi ponds.

• Automatic Temperature Compensation (ATC): Built-in thermal sensor automatically adjusts measurements for water temperature variations.

• Backlit HD Digital LCD Display: High-contrast illuminated screen ensures easy reading in low-light equipment areas or direct outdoor sunlight.

• IP67 Waterproof Pen Construction: Durable, sealed pen-style housing with a protective cap withstands accidental drops into water tanks or pools.

Why Choose Our 7-in-1 Digital Water Tester

Carrying multiple separate testing tools or relying on hard-to-read paper test strips is inconvenient, costly, and prone to inaccurate color matching. Single-function pens miss essential marine and sanitizer metrics like Salinity, Specific Gravity, or ORP, leaving you blind to actual salt density or oxidation power. This 7-in-1 water quality meter combines multi-metric tracking, precise marine salinity sensing, automated thermal compensation, IP67 waterproof durability, and pocket-sized convenience—giving your marine aquarium, hydroponic farm, pool care, and drinking water testing an instant professional upgrade.

Perfect For

• Monitoring salinity and specific gravity in saltwater aquariums, marine reef tanks, and commercial aquaculture

• Managing nutrient concentrations and pH balance in hydroponic reservoirs, indoor gardens, and aquaponics

• Verifying sanitizer strength and chemical balance in swimming pools, hot tubs, and spas

• Auditing drinking water purifiers, reverse osmosis (RO) systems, and household filtration performance

• Gifting as a practical pool owner gift, aquarium enthusiast present, or grower tool essential

Specifications

• Testing Metrics: pH / ORP / TDS / EC / Salinity / SG (Specific Gravity) / Temperature

• Temperature Compensation: Automatic Temperature Compensation (ATC)

• Waterproof Rating: IP67 Waterproof & Dustproof

• Display Type: Backlit Digital LCD Display Screen

• Features: Multi-Unit Mode Switch, Data Hold Function, Low Battery Indicator

• Ideal Uses: 7-in-1 Water Quality Tester, pH ORP TDS EC Salinity Pen, Marine Aquarium SG Monitor