GroStar GS1 pH Pen

A lab-grade tool designed specifically for horticulture, this easy-to-use pen allows you to quickly measure and calibrate pH. Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance. Details: Sensitive pH lithium glass membrane with sensor shield for accuracy and durability Replaceable probe Powered by (4) AAA batteries with auto off function Automatic temperature compensation Manufacturers warranty available (2-year warranty on pen, 1-year warranty on probe) pH 4.00/7.00 Calibration Solutions included, 50 ml each KCL Storage Solution included, 10 ml