Introduction: This digital pen style PH meter is an ideal instrument for any aquarium, fishing industry, swimming pools, school laboratories, food and beverage, etc. And this Digital TDS Water Quality Tester is perfect for all basic water testing applications. This product is highly efficient and accurate with advanced microprocessor technology. Scope of Application: Production and Drinking Purified Water, Plating Liquid, Water Boiler, Aquarium Water, Pool Water, Photo Rinse Water, Sump Water, Phreatic Deep Water, Laboratory, Aquaculture, Food Processing, etcFeatures:With compact portable designExcellent PH meter, highly accurate and durableThis digital pen-style pH meter is the perfect instrument for anything you may need to test pH levelsLCD display tap: large LCD screen that has excellent waterproof performance and allows you to easily read the displayed valueSpecifications:Display: Digital LCD DisplayMeasurement Range: 0.00-14.00pHRSuction: 0.01pHDaccuracy: ± 0.05pHHuction: 2 * LR44 1.5V batteries (use more than 500 hours)Working Temperature: 0°C - 80°C Calibration: Automatic two-point calibrationDigital ph meter size: L * W * H/155mm * 30mm * 14mm/6.11" * 1.18" * 0.55" Package Contents: 1 x Digital pH Meter1 x User Manual 1.