The HI 96107 (pHep) is an economical pH pocket tester with a Range: 0.0 to 14.0 pH, Accuracy: ±0.1 pH and a manual 1 point calibration. The pHep is a combination of an electrode with an LCD where the measurement is displayed. The electrode is protected by a rugged epoxy external body and it is supplied with a cap that can be used as a vessel to perform measurements.Range0.0 to 14.0 pHResolution0.1 pHAccuracy±0.1 pHCalibrationmanual, 1 pointBattery Type / Life3 x 1.5V / approx. 150 hoursEnvironment0 to 50°C (32 to 122°F); RH max 95%Dimensions150 x 30 x 21 mm (5.9 x 1.2 x 0.8")Weight70 g (2.5 oz.)