AI531 Includes Only:PH820 Lab pH MeterLabSen 211 Lab pH ElectrodeMP500 temperature electrodepH Standard Buffer (4.00 pH,7.00 pH,10.01pH/50mL) 1 for each3M KCL Solution (50ml)Pipette9V Power AdapterFlexible Electrode HolderPC-Link Software DiskUSB CableInstruction ManualQuick ManualFeatures:Highest Accuracy: ±0.002 pHThe Swiss Labsen 211 pH Combination Electrode ensures highly Stable & Accurate pH/temp. measurementsQuick and Easy 1 to 5 points auto calibration with calibration guide and reminder function (premixed standard solutions included)Electrode's slope display shows the health of your electrodeThe 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) with USB data outputThe Apera Instruments PH820 Precision Benchtop pH Meter Kit provides reliable pH measurements with various intelligent functions and a durable structure. Equipped with Swiss LabSen 211 Combination pH electrode, the meter measures pH with ATC in a quick and accurate manner. "EH" ORP (Redox) measuring mode available (ORP electrode sold separately).Intelligent Functions:Quick & Easy 1 to 5 Points Auto Calibration. The Smart Self-Diagnosis helps you conduct proper calibrations and monitor the condition of your probe with electrode's slope data display. The large clear 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 PC software support. Timing measurement/data logging mode and Smart calibration reminder function available.Reliable Structure:IP54 Waterproof and Dustproof, ideal for use in harsh environments. It comes with a complete test kit including a meter, a pH electrode, a flexible electrode arm and holder, a USB cable, a PC-Link software disk (Windows-based system only), a power adaptor, and 3 bottles of calibration solutions.