The Triplett PH325 Long Tube pH Pen is an advanced pH measurement tool designed for precision and convenience. Its distinctive long tube design enables easy access to hard-to-reach areas, making it an ideal solution for a variety of applications. With high accuracy, a user-friendly interface, and automatic temperature compensation, this pH pen ensures reliable and efficient pH measurements. It features a simultaneous display of pH and Temperature angled perfectly for viewing, 1-, 2-, or 3-point calibration, and a Hold Function to "freeze" the reading on the display for easy viewing. Waterproof (IP65). Includes (2) CR2032 batteries.