Starting at $3,573.00
  • Usually ships in 12-18 weeks



  • Measures pH, ORP, conductivity, resistivity, oxygen, chlorine, and ozone in a variety of process liquids
  • Compatible with most Rosemount Analytical sensors
  • Choice of HART or FOUNDATION Fieldbus communications protocol
  • Large, easy to read two-line display shows the process measurement and temperature
  • Simple menu structure
  • Robust NEMA 4X and NEMA 7B enclosure
  • Optional intrinsically safe design allows the transmitter to be used in hazardous environments (with appropriate safety barriers)
  • Non-volatile memory retains program settings and calibration data during power failures

The Foundation Fieldbus FISCO option is being phased out and will be obsolete in the near future. The suggested replacement is the Rosemount Analytical 1066 Liquid Analytical Transmitter. Please contact us if you have any questions.


The Rosemount Analytical Model 5081 family of transmitters can be used to measure pH, ORP, conductivity (using either contacting or toroidal sensors), resistivity, oxygen, free chlorine, total chlorine, and ozone in a variety of process liquids. The 5081 is compatible with most Rosemount Analytical sensors. With a rugged, weatherproof, corrosion-resistant enclosure (NEMA 4X and IP65) of epoxy-painted aluminum, the 5081 meets NEMA 7B explosion-proof standards making it possible to locate the transmitter close to the sensor even in the harshest environments.

The Rosemount Analytical 5081 transmitter is simple to set-up and operate. A large, easy to read two-line display shows the process measurement and temperature. The 5081 includes the HART or Foundation Fieldbus digital communication protocols which allows users to set-up, configure, read process variables, and troubleshoot problems via PC or HART communicator. Additionally, an optional handheld infrared remote controller can also be used for programming and calibrating the transmitter. The remote controller works from as far away as six feet.

Models of the Rosemount Analytical Xmt family of transmitters:

  • 5081–A:

    Amperometric transmitter measures dissolved oxygen (ppm and ppb level), free chlorine, total chlorine, and ozone
  • 5081–P:

    pH/ORP transmitter
  • 5081–C:

    Contacting conductivity transmitter measures conductivity, resistivity, or custom curve variable
  • 5081–T:

    Toroidal conductivity transmitter measures conductivity, percent concentration, or custom curve variable



Mounting Bracket



Please consider these optional accessories.


This product can be used in the following applications: