The 228-Kit includes a multifunctional pH meter complete with a PE-03 electrode, temperature sensor, SD memory card, batteries, user manual, calibration solution and protective carrying case. The included 288 pH meter is an easy-to-use handheld device for measuring pH, mV and °C. With the 228 pH meter, both temperature and pH values can be directly stored onto an SD card in Excel format, or transferred to a PC through the RS-232 interface. An optional software and data cable for the 228 pH meter are available as optional accessories to transfer data to a computer. 
 
Temperature compensation in the 228 pH meter can be done manually or automatically by way of the temperature sensor which is included. The pH meter has two calibration points. The calibration can be done with the trimmer on the side of the device which is protected under a cover. With this combined device, the user can determine pH value, temperature or Redox potency (ORP). For the latter measurement parameter, a Redox electrode must be ordered separately from the 228 pH meter. We recommend the ORP-14 electrode. The pH meter is powered by a 9V battery which is included. Here at this link you can find an overview of any type of pH meter that you may need.