Measure pH and conductivity or pH and ORP at the same time. Datalogging feature time-and-date stamp. Infrared (IrDA) wireless technology lets you easily print or download dataŚno need for additional cables. The large backlit LCD shows the measured value, measured units, temperature, time, battery life, and menu options. PC 650 meter measures conductivity (up to 500 mS), TDS, salinity, or resitivity.