Eutech ION 2700 pH / ION / mV-Redox-ORP / Temperature Intuitive, self-diagnostic and flexible with advanced set-up options for user-customization, the Eutech ION 2700 series comes with a large, one-glancesees- all screen. View pH, ION or Redox reading together with temperature, electrode status, calibration points, date and time all at once!