Hanna Instruments HI 96107 pH meter (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.