AI413 Includes Only:The high quality 201T-S 3-in-1 pH and Temperature Combination Electrode/Sensor and BPB (Brush-Resistant Platinum Black) 2301T-S Conductivity and Temperature Electrode/Sensor ensure Quick & Accurate pH and EC measurementsIP57 Waterproof and Dustproof, ideal for use in harsh environmentsThe large clear LCD displays EC/pH and temperature simultaneously along with icons of stable readings and finished calibrations.Quick and Easy 1 to 3 points auto calibrationFeatures:The high quality 201T-S 3-in-1 pH and Temperature Combination Electrode/Sensor and BPB (Brush-Resistant Platinum Black) 2301T-S Conductivity and Temperature Electrode/Sensor ensure Quick & Accurate pH and EC measurementsIP57 Waterproof and Dustproof, ideal for use in harsh environmentsThe large clear LCD displays EC/pH and temperature simultaneously along with icons of stable readings and finished calibrations.Quick and Easy 1 to 4 points auto calibrationThe Apera Instruments PC400 Portable pH/Conductivity/TDS Meter Kit is the most economical choice for a reliable portable pH& conductivity meter. Equipped with Apera's high quality 201T-S 3-in-1 pH and Temperature Electrode/Sensor and BPB (Brush-Resistant Platinum Black) 2301T-S Conductivity and Temperature Electrode/Sensor, the meter tests pH, EC, TDS, and temperature in a quick and accurate manner.Intelligent Functions: Quick & Easy 1 to 4 Points Auto Calibration. The Smart Self-Diagnosis helps you conduct proper calibrations and determine the condition of your probe. Fully configurable parameter setting: solution standards, temperature unit, backlight time, auto-power off time, TDS factor, temperature coefficient, etc. 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 conductivity electrode, and 6 bottles of calibration solutions in a rugged carrying case. Powered by AA Batteries.