Hanna Instruments Checker pH Tester

Combining affordability and advanced features, the Checker is ideal for use by researchers and students! In addition to simple, one-button operation, the Checker features automatic calibration to one or two points. Calibration buffers are automatically recognized, and buffer values are shown on the display as a tag after calibration. The probe measures 4.1” long and 0.3” in diameter, allowing for use in test tubes and vials. The Checker also features a stability indicator, low battery indicator, automatic shut-off, and a large LCD. Includes pH electrode, two pH 4.01 buffer solution sachets, two pH 7.01 buffer solution sachets, two electrode cleaning solution sachets, instruction manual, and carrying case.