The Liquiline CM442 four-wire, two-parameter transmitter for analytical sensing applications measures any combination of various parameters, including nitrate, turbidity/suspended solids, dissolved oxygen, pH/ORP, chlorine, concentration and conductivity. It is powered by 100-230 Vac 50/60 Hz, 24 Vac 50/60 Hz, or 24 Vdc; conforms to Type 4X (IP66/IP67); and is NRTL-certified.