... PH meter 2code:SX-650 3high quality ,easy to operate ,ATC,waterproof 4TDS ,T ,salt, available Technical Parameters:1.Range: Conductivity: 0 ... ~ 50.0 mS/cm Temp: 0 ~ 50.0°C2.Accuracy: Conductivity: ±1.0% FS; Temperature: ±0.5°C3.Temp. compensation range ...