Milwaukee Mi150 is an advanced pH/Temp microprocessor-based bench meter. It is ideal for students and technicians who need fast and reliable measurements. This meter is provided with a series of new diagnostic features which add an entirely new dimension to the measurement of pH, by allowing the user to dramatically improve the reliability of the measurement: Automatic Temperature Compensation (ATC) for good accuracy under fluctuating temperatures, Easy to read large custom LCD, Easy and Quick Push-button Calibration, 7 memorized buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18,10.01 and 12.45) for calibration, Messages on the LCD to make the calibration easy and accurate, User-selectable "calibration time out" to remind when anew calibration is necessary, Stability Indicator prompts whenever reading stabilizes. Moreover, it offers an extended temperature range from –20°C (–4°F) to 120°C (248°F),using the MA831R interchangeable temperature probe.