The Thermo Scientific™ Expert pH Pocket Tester is designed for on-the-go measurements of pH and temperature. The Expert pH Pocket Tester is best used in applications such as hydroponic gardening, aquaculture, agriculture, pools, cooling towers, and more! Display: Large 4 digit double line display and wide viewing angle make it easy to read and record measurements Battery life, ready, and calibration indicators Simultaneous display of pH with temperature Keypad: Easy to operate and intuitive user interface with power, calibration, menu, and enter keys One push calibration: immerse sensor in calibration solution and press “Cal” Auto pH buffer recognition and calibration Cap: Gasketed and leak proof with an O-ring seal Transparent cap with a fill line indicator Symmetrical cap can be front or rear facing Cap secures to the top of tester when not in use Additional features: Lanyard provision enables the user to easily transport the pocket tester for on-the-go measurements Pocket tester floats and meets Waterproof IP67 rating Wide, stable base allows the tester to independently stand vertically for measurements Automatic temperature compensation: adjusts readings according to temperature change for greater accuracy Auto-off function: pocket tester turns off after 8.5 minutes of non-use to extend battery life CD/RoHS Marking