Extech ExStik Waterproof pH Pen Model PH100

This multi-application pH pen features a large, 3-1/2 digit digital display with a bar graph which fluctuates to show changes in a particular reading. Fifteen readings can be stored and recalled, and the last calibrated value is saved. The pen also displays temperature. Other features include data validation indicators that show the reading is stabilized, data hold for current reading, automatic shut-off, and low battery alert. The waterproof design floats and the rubberized housing provides a sure, non-slip grip. One year manufacturer’s warranty. Comes complete with meter and pH electrode, protective sensor cap, sample cup, four LR44 button batteries, and neckstrap.