The transmitter ACM-X in a field or panel housing offers convincing solutions for all applications in the area of drinking water-preparation as well as process water and waste-water treatment. The parameters to be measured (conductivity or resistance) are selected in the menu. The associated measured value can be output to the display in the other measuring mode during measurement. The temperature is shown simultaneously and can be toggled between °C and °F or removed as required. Conductive or inductive conductivity metrology? Two device versions for measuring with conductive (twoelectrode) measuring cells or inductive measuring cells are available. An inductive measuring cell is recommended for concentration measurements or very sticky samples, as this is much less sensitive to coating than conductive measuring cells. Temperature compensation can operate linearly ( means: without temperature compensation) or as a special high-purity water compensation (NaCl curve) according to IEC 746. The reference temperature is 25 °C. Different alarms are needed depending on the application and user. Therefore, the transmitter allows the configuration of the alarm contact and the residual current independently of one another and isolated for every possible fault. Unnecessary or undesired alarms can thus be removed. The two additional contacts can be used as limit contacts (and for temperature as well), as P(ID) controllers and for cleaning functions. The cell constant can be edited and calibrated for special sophisticated applications.