Rosemount Analytical 6888 in situ flue gas O2 analyser

Emerson Process Management has enhanced the Rosemount Analytical 6888 in situ flue gas O2 analyser with diagnostics that help maintain optimum oxygen levels in flue gases, thereby optimising the combustion efficiency of large boilers and industrial furnaces.

The analyser incorporates a ‘calibration recommended’ diagnostic with gas-switching solenoids embedded within the probe electronics, which reduces the cost of providing and installing a separate solenoid box and also reduces the effort to wire and pipe between the probe and electronics. The diagnostic removes the need to conduct calibrations on a schedule, eliminating many validations (calibrations checks) or actual calibrations. The analyser also includes a ‘plugged diffuser/filter’ diagnostic for applications that have fly ash or other particulate entrained in the flue gases.

The analyser incorporates a variable insertion option, which permits ideal placement of the probe into the flue gas duct. With standard length probes from 0.5 to 3.65 m in horizontal or vertical installation, the probe can be adjusted online to characterise stratification across large ducts.

The improved accuracy of the analyser can also minimise the production of greenhouse gases such as CO₂, and of thermal NO_x.

All active components can be replaced, including the diffuser/filter, sensing cell, heater and thermocouple, and all electronics cards. The analyser offers HART and FOUNDATION fieldbus digital communications and can also be configured with the optional Smart Wireless THUM adapter for wireless operation.