The Philip Harris pH Tester is our compact and easy to use pH checker.Useful for pH measurement applications in School Science, both inside the laboratory and for use outdoors.Technical Specification:Measurement Range: 0.00 to pH 14.00Accuracy: 0.1 at 20°CResolution: 0.01 Operating Temperature: 0°C to 50°CCalibration: Manual, single pointBattery: 3 x AG13 Button Cell Battery (1.5V)Dimensions: 175mm x 51mm x 25mmWeight: 75g