... PH meter, digital ph meter, pen type ph meter, PH controller, PH 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 ... function is new adding than old model PH-013) RangePH:0.00~14.00mV ... 2pH± 1%FS± 1%FS± 0.5%FS± 1%FSTem CompensationNoYesYesNoYesCalibration solutionYesYesYesNoYesPowerAAA batteries* ...