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  • 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 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


Rosemount Analytical Connector Cable
Lengths of cable with VP8 sensor connectors
In Stock

Mounting Bracket

Rosemount Analytical Pipe/Wall Mounting Bracket
Pipe & wall mounting bracket for models 1056, 1057, 5081, 6081 & XMT
In Stock


Rosemount Analytical Model 389 pH/ORP Sensor
Insertion pH/ORP sensors with optional integral preamp
In Stock
Rosemount Analytical 499 Series Dissolved Oxygen/Ozone/Chlorine Sensors
Precision dissolved oxygen, dissolved ozone and chlorine sensors
In Stock
Rosemount Analytical Model 3900 pH/ORP Sensor
3900 and 3900VP general purpose pH/ORP sensors
In Stock


Please consider these optional accessories.

Rosemount Analytical 99CC Calibration Certificate
One certificate per lot at standard factory ranges only, includes the model, serial and/or tag numbers (does not include actual test data)
Rosemount Analytical Electronic Calibration
Certificate for specific unit, includes model, serial and/or tag numbers, test standards, NIST report numbers, & the actual test data
Rosemount Analytical Certificate of Origin
Original certificate of origin with chamber of commerce stamp
Rosemount 1410 Wireless Gateway
Connects WirelessHART networks with host systems & data applications, offers network flexibility for remote indoor operations
Rosemount 1420 Wireless Gateway
NEMA 4X gateway connects WirelessHART networks with host systems with the capacity for up to 100 devices
Rosemount 775 Wireless THUM Adapter
Enables wireless capabilities for 2, 3, or 4-wire HART devices to remotely manage, monitor & gather data
In Stock


This product can be used in the following applications: