The world's first in situ, zirconium oxide-based oxygen transmitter for flue gas measurement is now even more versatile as a "split architecture" instrument
The world's first in situ, zirconium oxide-based oxygen transmitter for flue gas measurement is now even more versatile as a "split architecture" instrument. Emerson Process Management has made available the option to separate the Rosemount Analytical Oxymitter 4000 control unit from the analysis section to provide remote monitoring and programming flexibility for flue gas measurements. The Oxymitter 4000 integrates an oxygen probe, field electronics and fully automatic calibrator into a single, compact package, or this can now be separated for mounting flexibility.

The probe inserts directly into a flue gas duct to measure oxygen in combustion processes with no sampling system required.

The flue gas measurements are used in a control system or by boiler operators to fine-tune burner fuel/air ratios for maximum efficiency, and for achieving the lowest NOx levels.

"The remote electronics option provides users with more flexibility for those installations where the ambient temperatures at the probe location may be higher than 85C."

said Stephane Canadas, Rosemount Analytical Combustion Product Specialist with Emerson.

"Combined with PlantWeb digital plant architecture, operators can observe data and perform system maintenance at the unit or remotely".

Through the HART protocol, the Oxymitter 4000 provides oxygen measurement functionality to PlantWeb digital plant architecture, powering PlantWeb to perform diagnostics and information delivery to plant operators and maintenance personnel.

This functionality results in superior control performance, optimisation of plant assets, increased plant availability and reduced maintenance costs.

Service diagnostics and calibrations can be performed remotely with a HART handheld communicator or a personal computer equipped with AMS Suite: Intelligent Device Manager software.

To take the guesswork out of calibration, the Oxymitter 4000 provides an on-line diagnostic that determines when calibration is needed.

The Oxymitter electronics initiate an on-line impedance measurement of the sensing cell once every hour, which directly correlates to cell accuracy.

This feature can trigger a fully automatic calibration via the SPS 4000, ensuring that the analyser is always accurate.

Also, many needless calibrations based on "time in service" are eliminated.

In addition, the Oxymitter 4000 is fully field-repairable, as the probe design provides convenient access to internal components so technicians can service the unit in-house.

The cell and heater/thermocouple are fully field-replaceable.

Adaptable to any existing oxygen probe installation, the Oxymitter is ideal for large and small combustion processes like industrial boilers, process heaters, kilns and reheat furnaces.

Probes are available in lengths from 0.45 to 3.6 metres, and optional accessories for the Oxymitter 4000 include accessories for use in flue gases up to 1000C.