Mettler Toledo Seven Compact Conductivity Meter (S230)

Specifications (see manual for details):

                          Measuring Range                   Resolution     Accuracy
Conductivity    0.001 μS/cm … 1000 mS/cm   0.001 … 1      ± 0.5%
Temperature    -30.0 … 130.0°C                       0.1 °C            ± 0.1 °C

Calibration: 13 pre-defined or 1 user-defined standard
Cell constant: Determined via calibration or entered manually
Temperature compensation: Linear, non-linear, off, pure- water – reference temperature 20 °C or 25 °C