Item Type: Water Quality Tester Model: EC015BL Material: ABS PH Measurement Range: 0.00-14.00pH. EC Measurement Range: 0~9990us/cm. TDS Measurement Range: 0-19990ppm. PH Measurement Resolution: 0.01pH. EC Measurement Resolution: 10us/cm. TDS Measurement Resolution: 10ppn. PH Accuracy: 0.1pH EC and TDS Accuracy: 2% F.S TEMP Accuracy: 1, that is, 2. Temperature: -50~70, that is, 58~158. Battery: 3 x 1.5V LR44 button battery, shipped without battery. Temperature Compensation: 0 - 50 Working Temperature: 0 - 50 13 in 1 Water Tester: Wide in testing range, the water quality tester is able to test the pH, TDS and EC of the water, satisfying your needs. 2The Digital Display: Large screen will clearly show the testing valve, meanwhile the digital display will largely simplify your operation. 3Reliable in Working: Equipped with highly sensitive waterproof glass probe, the water quality tester has quick response and high accuracy. 4Broader Application: Suits for hydroponics, horticulture, swimming pool and spa, aquarium and coral tank, ionized water generator and more. 5Convenient Carrying: Designed to have a light weight and a compact size as well, the water quality tester is very convenient to carry and use.1 x Water Quality Tester 3 x Accessory