The Oakton WD-35434-00 CyberScan PCD650 top-of-the-line meters offer features that are typically found on much more expensive models. The IP67-rated housing allows use in dirty and wet environments without harm to the meter. Datalog up to 500 points either automatically, manually, or at timed intervals. User-selectable “calibration due” alarms, automatic or manual standards recognition, and single or multiple calibration points provide flexibility in meeting your data quality objectives. Infrared (IrDA) wireless technology lets you easily download data—no need for additional cords. The large backlit LCD shows the measured value, measured units, temperature, time, battery life, and menu options. The WD3543400 includes a WD-35816-71 pH probe, WD-35408-57 conductivity cell and WD-35640-50 Dissolved Oxygen probe.