Description Portable PH Meter The Milwaukee pH55 pH meter is a pocket-sized, waterproof pH & Temperature meter. It features a digital display, automatic calibration, and automatic temperature correction. The pH55 also has an auto-off function to save battery life, and a hold button that freezes the display for easy recording. The electrode is replaceable. Range:                                    -2.0 to 16.0 pH,  -5.0 to 60.0 °C Resolution:                              0.1 pH, 0.1 °C Accuracy: (@25 °C)                 ±0.1 pH, ±0.5 °C Temperature Correction:        Automatic (-5 to 60 °C) Battery Type:                          4× 1.5V; IEC LR44, A76 (included) Battery Life:                            approx. 300 h. Dimensions:                            200 mm long × 38 mm diameter Weight:                                   100 g