Ensure precise and professional water quality testing with our advanced Water Quality Test Pen, designed to measure pH, EC (conductivity), TDS (ppm), salinity (ppt), and temperature quickly and accurately. Crafted with durable ABS material, this versatile tester is ideal for a wide range of applications including aquariums, aquaculture, soilless culture, swimming pools, hot springs, school laboratories, chemical processing, food and beverage manufacturing, textile printing and dyeing, paper bleaching, cooling towers, boilers, and sewage treatment. Key Features: · Comprehensive Water Quality Measurement: Accurately tests pH (0.00-14.00 pH), EC (0-400.0 mS/cm), TDS (0-10000 ppm), salinity (0.01%-25.00%), and temperature (0-60°C/32-140°F) to meet diverse monitoring needs. · High Precision and Resolution: Offers 0.01 pH accuracy with ±0.05 pH resolution, 1 μS/cm EC accuracy with ±2% full scale resolution, 1 ppm TDS accuracy, and temperature accuracy of ±0.5°C/°F for reliable results. · Automatic Calibration & Temperature Compensation: Features automatic calibration and 0 to 60°C automatic temperature compensation to ensure precise measurements under varying environmental conditions. · Intelligent Self-Diagnosis: Provides prompts for out-of-range measurements and incorrect calibration, enhancing user confidence and accuracy. · IP67 Waterproof and Dustproof: Designed to withstand harsh testing environments with a rugged, waterproof, and dustproof construction for durability and long-lasting use. · Large Backlit LCD Display: Equipped with a clear, easy-to-read LCD screen with backlight for convenient operation and accurate readings even in low-light conditions. · Auto Power-Off Function: Conserves battery life by automatically shutting down after 5 minutes of inactivity. Specifications: · Item Type: Water Quality Test Pen · Model: EZ-9909SP · Material: ABS · Battery: 3 x 1.5V LR44 (Battery Not Included) · pH Range: 0.00-14.00 pH; Accuracy: 0.01 pH; Resolution: ±0.05 pH · EC Range: 0-10000 μS/cm, 10.1-19.99 mS/cm, 20.1-400.0 mS/cm; Accuracy: 1 μS/cm, 0.1 mS/cm; Resolution: ±2% F.S · TDS Range: 0-10000 ppm, 10.1-200.0 ppm; Accuracy: 1 ppm, 0.1 ppt; Resolution: ±2% F.S · Salinity Range: 0.01%-25.00%, 0-10000 ppm, 10.1-200.0 ppt; Accuracy: 1 ppm, 0.1 ppt, 0.01%; Resolution: 0.01%-5.00% (±0.1%), 5.1%-25% (±1%), ±2% F.S · Temperature Range: 0-60°C/32-140°F; Accuracy: 1°C/°F; Resolution: ±0.5°C · Automatic Temperature Compensation: 0-60°C · Automatic Shutdown: After 5 minutes of no operation Package Includes: · 1 x Water Quality Test Pen This Water Quality Test Pen combines accuracy, durability, and user-friendly features to provide a reliable solution for water quality monitoring across multiple industries. Its automatic calibration, temperature compensation, and intelligent diagnostics make it an essential tool for professionals and enthusiasts seeking precise and efficient water testing.