ConDUCTIVITY / TDS PROBE Model : YK-200PCT * Plug in the YK-2001PH to be a professional Conductivity and TDS Meter. * Conductivity : 2/20 mS, 2 ranges * TDS : 2000/20,000 PPM, 2 ranges * Temperature : 0 to 60.0 oC, 0.1oC/0.1oF. * ATC variable temp. compensation factor adj.