Oakton ECTestr 11 Plus Waterproof Conductivity Meter, 0 to 200.0 microsiemens/cm, 0 to 2,000 microsiemens/cm, and 0 to 20.00 millisiemens/cm Portable, dual-range conductivity meter measures electrical conductivity for a wide range of water quality applications Automatic temperature compensation (ATC) and manual or automatic one- or two-point calibration LCD screen with indicators and error messages, dual-line display Integrated 2-pin, stainless steel electrode provides chemical resistance and is replaceable Ingress Protection certified IP67 for protection against dust and short periods of immersion in water