PH400S Portable pH Meter KitThe Apera Instruments PH400S Portable pH Meter Kit provides reliable pH measurements with various intelligent functions and a durable structure. Equipped with Apera's high quality 201 T-S 3-in-1 pH/Temperature Electrode/Probe, the meter tests pH and temperature in a quick and accurate manner.Intelligent Functions: Quick & Easy 1 to 5 Points Auto Calibration. The Smart Self-Diagnosis helps you conduct proper calibrations and determine the condition of your probes. GLP Data management (500 groups of data storage), USB data output and power supply. Timing measuring/data logging mode and Smart calibration reminder function available. Purified water and ammonia-added purified water measuring modes available. The large clear LCD displays pH/EC and temperature simultaneously along with icons of stable readings and finished calibrations.Reliable Structure: IP57 Waterproof and Dustproof, ideal for use in harsh environments. It comes with a complete test kit including a meter, a pH electrode, a USB cable, PC-Link Software Disk (only works for Windows-based system), and 3 bottles of calibration solutions all in a rugged carrying case. Powered by AA Batteries.Features:The high quality 201 T-S 3-in-1 pH/Temperature Combination Electrode/Probe generates quick and accurate pH measurements (±0.01 pH, -2 to 19.99 pH)IP57 Waterproof and Dustproof, ideal for use in harsh environmentsThe large backlit LCD displays pH and temperature simultaneously along with icons of stable readings and finished calibrations.GLP Data management (500 groups of data storage), USB data output and power supplyQuick and Easy 1 to 5 points auto calibration with calibration reminder function (premixed standard solutions included).