... monitor, TDS meter, EC meter, CF meter, ORP controller PH meter, digital ph meter, pen type ph meter, PH controller, PH monitor, TDS meter, EC meter, CF meter, condutometer ... .00, pH9.18Reference Cell type: Replaceable KCl gel filledDisplay: LCDBattery: Three G13-A CNB lithium 1.5V batteries (included)Battery life ...