The most complete R3000SD package, combining the meter, pH electrode, ORP electrode, and an ATC temperature probe for automatic compensation, along with a 16GB micro SD card (with adapter) and an AC power adapter for continuous logging without relying on batteries. It still delivers the same pH (0.00-14.00) and ORP (+/-1999 mV) ranges with adjustable sample-rate data logging exportable as spreadsheet-ready files. Well suited to longer unattended monitoring runs in aquariums, wastewater, or production settings.