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•Datasheet: OCX8800 Oxygen/Combustibles Transmitter
•Brochure: Combustion Analysis Solutions

Enhanced Design of the Oxygen/ Combustibles Transmitter for Combustion Flue Gas Analysis

Emerson has taken the proven performance of the Rosemount Analytical OCX 4400 and added a new combustibles sensor design and sensor housing upgrades to enhance the reliability of these measurements. The new sensor housing along with the new electronics design makes the OCX 8800 the most dependable oxygen/combustibles transmitter on the market and is so complete that it truly is an entirely new instrument.

The OCX 8800 takes an easier, original rugged design of the OCX 4400 and adds a more stable sensor, electronics and software package. The time-tested and worldrenowned zirconium oxide sensor used in the Oxymitter™ is still the basis for the oxygen measurement. This, coupled with the new patented combustibles sensor can detect oxygen and combustibles concentrations in flue gases with temperatures up to 2600° F (1427° C). Typical applications include:
refinery process heaters
petrochemical reactor furnaces
small package hot water and steam boilers
inert process atmospheres gas, oil and some coal boilers

Two separate 4-20 mA signals are used as outputs for this transmitter. The two independent 4-20mA signals are used for the oxygen measurement and combustibles measurement. They are fully field-scalable to each processes requirement. The OCX comes with a NEMA 4 rating, but can be configured for hazardous area locations. The hazardous area ratings are CSA/FM Class 1, Zone 1 for North America and ATEX II 2 G EExd for the European community.

The OCX also has Plantweb® capability with the HART protocol accessible via a Model 375 Handheld Communicator or through a PC-based system using AMS software. Emerson Process Management's Plantweb field-based architecture allows technicians to view all diagnostic and operational parameters from any location where an on-line PC is running with AMS. This reduces both commissioning/start-up time as well as down-time due to trouble shooting the analyzer. The new vacuum fluorescent display is easier to see than an LCD and also allows for easy set-up and diagnostics without a Model 375 Communicator. The OCX 8800 also has a configurable relay output for alarms.

The sensors are close-coupled to the process for minimal sample handling requirements. An eductor draws a sample past the filter in the sample block and past the sensors then returns it to the process. The sample block filter is easily maintained and accessible right at the OCX flange. Optional in situ filters and sample tube blow back are available for processes with particulate. Dilution air is added in the combustible sensor chamber to maintain a true combustibles measurement even in the absence of oxygen in the process. This feature allows measurements to be made while certain upset conditions exist such as burner fouling, process tube leaks, major variations in fuel BTU values and loss of flame.

Click Here To Download:
•Datasheet: OCX8800 Oxygen/Combustibles Transmitter
•Brochure: Combustion Analysis Solutions