Ensure precise and reliable water quality testing with this high-accuracy ORP Tester, designed for a wide range of applications including water sources, aquariums, hydroponics, and swimming pools. Featuring a compact and portable pen-style design, this tester is easy to operate and store, making it an ideal tool for both professional and home use. Key Features: · Compact Pen Design: Lightweight and portable for convenient operation and storage, perfect for on-the-go water quality measurements. · Large Backlit LCD Display: Provides clear, easy-to-read measurements even in low-light conditions, enhancing user accuracy and convenience. · High-Quality Electronic Components: Ensures precise and stable readings with an impressive resolution of 1 mV and an accuracy of ±5 mV for optimal sensitivity. · Wide Measurement Range: Capable of measuring ORP values from 0 to ±1999 mV, suitable for diverse water systems including aquariums, hydroponics, swimming pools, and general water sources. · Simple Operation with Hold Function: Features a “HOLD” button to lock measurement values for easy recording and review without needing to retest immediately. · Easy Calibration and Maintenance: Supports 1-point correction calibration for accuracy and includes cleaning instructions to maintain sensor reliability over time. Specifications: · Model: ORP2069 · Measurement Range: 0 to ±1999 mV · Resolution: 1 mV · Accuracy: ±5 mV · Operating Voltage: 4 × 1.5V AG-13 batteries (not included) · Working Temperature: 0℃ to 50℃ Package Includes: · 1 × ORP Tester · 1 × Installation Tool · 1 × User Manual This ORP Tester combines precision, ease of use, and portability in a durable design, making it perfect for accurate oxidative-reductive potential measurements in various water environments. Maintain water quality effectively with this sensitive and user-friendly testing instrument.