... ph meter,Lab PH meter, ph tester, ph controller, digityal ph meter, digital ph monitorMicroprocessor PH mV Meters,Pen type ph meter,Lab PH meter,ph tester, ph controller, digityal ph meter, digital ph ... 9VDC, using AC adapters 110VAC/220VAC,60/ 50HzModel: PHS-3CWpH Range: 0.00 to 14.00pHResolution & ... 9VDC, using AC adapters 110VAC/220VAC,60/ 50HzModel: PHS-3BWpH Range: 0.00 to 14.00pHResolution & ...