... ORP/oC/oF MeterSELON930 is a high accuracy meter used for measuring pH, Oxidation-Reduction Potential and ion concentration.electrode ... for best accuracy under fluctuating temperaturesViewing of electrode slopeAutomatic operation message promptsExpanded memory stores and ... interface What's included: Meter, Electrode holder, pH buffer, pH glass electrode, ORP electrode, Temperature probe, Power adapters. ...