"Microprocessor based testers for determination of electrical conductivity or Total Dissolved Solids within liquids.All units equipped with a custom microprocessor, guaranteeing high accuracy and linearity over the measurement range. Automatic calibration function. Automatic temperature compensation. Primo 2 measures and displays the temperature as well as conductivity. Operating temperature range: 0 to 60°CMaximum Conductivity = 1999µS\/cmMinimum Conductivity = 0µS\/cmBest Accuracy = ±2 %Resolution = 1 μS\/cmBattery Type = Button Cell (1.5 V) x 2Battery Life = 200 hPower Source = BatteryDimensions = 180 x 50 x 25mmWeight = 50gHeight = 25mm"