AWT210 single-channel two-wire transmitter for pH, redox (ORP) and conductivity in hazardous and non-hazardous areas has single-sensor interchangeable modular plug-and-play technology, so the same unit can be used with pH, redox (ORP) and ion-selective sensors as well as two- and four-electrode and to roidal conductivity sensors. Factory-calibrated modules for different sensors can be quickly fitted and exchanged via the transmitter’s hinged door, including future technologies such as ABB’s digital EZLink sensors.