Harvard Apparatus’s Model 211 pH meter supports pHs from zero to 14 +/-0.01 and temperatures from 0 C to 100 C +/-0.5 C. The meter also measures mV from +/-399.9 mV and +/-1,999 mV with ISE and ORP electrodes. Alarge displayshows both pH (or mV) and temperature simultaneously. The displayscreen also shows step-by-step operation, allowing users to easilyfollow the measurement process. A microprocessor supports calibrationand provides automatic buffer recognition.