... Conductivity Controller serial instruments are equipped with LCD display with back light, the error display, automatic temperature compensation function, colon standardizing ... the double-group relay control, high-&-low-point warning display and signal output control, automatic setting of retardation and power ... .01 cm-1 Measuring Range 0.50~20.00MW LCD indicater1Resolution 0.01 MW Accuracy± 0.5% FS