This SD series pH and ORP datalogging meter is capable of measuring 0.00 to 14.00 pH and 0 to 1999 mV (ORP). The SD-230 features automatic temperature compensation, Data hold, Max/Min functions, and an easy-to-read backlit LCD display. Using an SD card (max 16Gb), a user can select a desired sampling rate and quickly generate an Excel file without the use of software. Optional accessories include a tripod and AC adapter for continuous long-term monitoring. Optional PC software also allows a user to track live measurements.