Digital pH meter, high-precision pen-type pH tester (0.01 pH) for hydroponics, home beverage production, and swimming pools.

Package includes: 1 * Yellow Backlit pH Value Test Pen Application: Ideal for residential or commercial use, water, swimming pools, spas, liquid foods, laboratories, aquaculture, and hydroponics. Easy Calibration: Advanced technology makes test results quick and accurate; the LCD screen provides a clear reading. Features: Pocket-sized, lightweight, backlit, high quality. ATC Function: With automatic temperature compensation (ATC), adjust the water temperature and provide a pH reading almost instantly.