Combining the strengths of all CyberScan 600 series meters, the CyberScan PCD650 is our top-of-the-line waterproof handheld that enables concurrent measurement of pH, conductivity, dissolved oxygen and temperature, all at the same time. :: Simultaneously measures and displays four parameters :: ±1% full scale accuracy at 3-decimal resolution across a wide measurement range :: Ion-measurement capabilities with 3-digit resolution :: Accepts two-cell and four-cell conductivity probe to measure up to 500 ms — meter measures pure water!