< InstrumentsRosemount Transmitters1056 (4-wire)56 (4-wire)1057 (4-wire)5081 (2-wire)1066 (2-wire) Save as PDF pH, ORP, Ion Selective (ISE), Conductivity (EC) & Dissolved Oxygen (DO) Inline Analyzers, Controllers & Transmitters Rosemount 1056 Single or Dual Channel pH / ORP / ISE / Conductivity Analyzer & Transmitter Rosemount 1066 Two-Wire Loop-PoweredpH/ORP & Conductivity Analyzer with HART & FieldBus Rosemount 56 Single or Dual Channel pH / ORP / ISE / Conductivity Analyzer & Transmitter Rosemount 5081 pH / ORPTransmitter / Analyzer / Controller Rosemount 1057 Single, Dual or Triple ChannelpH / ORP / ISE / Conductivity Analyzer & Transmitter