PH measurement ranges from -2 to +16 with a resolution and measurement accuracy of ± 0.01. Potential difference measurement range: +399.9 to -399.9 with a resolution of 0.1 mV and an accuracy of 0.2 mV. Possible difference measurement range: 2000 – up to +2000 with a resolution of 1 mV and an accuracy of 1 mV, temperature measurement range from -9.9 to +120 degrees Celsius with a resolution of 0.1 degrees Celsius