6888 IN SITU FLUE GAS OXYGEN TRANSMITTER The new standard for combustion flue gas analysis The 6888 in situ O2 transmitter provides accurate measurement of the oxygen remaining in the flue gases coming from any combustion process, including: > Boilers > Industrial Heating Furnances By maintaining the ideal level of oxygen, the flue gases coming from these processes, optimal efficiency is gained, and the lowest level of NOX, CO, and CO2 are produced. EASY TO USE. EASY TO INTEGRATE. This in situ design places a zirconium oxide sensing element at the end of a probe, which inserts directly into a flue gas stream. There are no moving parts or sampling apparatus, resulting in an extremely reliable analyzer that requires very little maintenance. Probe lengths are available from 18" to 12', and a slip mounting option provides the ability to mount a long probe at any insertion depth. Heavywall probe tubes are available for applications where fly-ash erosion is a problem. Accessories are available for process temperatures above 700°C to 1050°C. VARIABLE INSERTION OPTION Calibrations may be performed online, while the furnace is in operation, and fully automated calibration with solenoid switching is also available. The 6888 is fully field repairable. All active components can be replaced, including the diffuser/ filter, sensing cell, heater and thermocouple, and all electronics cards. Signal conditioning electronics reside in the head of each probe, eliminating the need for expensive signal cable. An optional dual-channel operator interface unit provides an easy-to-use method of setting up the instrument, calibrating, and diagnosing failures. ON-BOARD ELECTRONICS On-board electronics provides heater control and signal conditioning, resulting in a linear 4-20 mA signal representing flue gas oxygen. Electronics temperature specification is 85°C (185°F). No special signal cable is required. HART® 475 communicator or AMS can be used for setup, calibration, and diagnostics. Lengths from 18" (.9m) to 12' (3.65m) the new variable insertion option permits ideal placement of the probe into the flue gas duct. Probe can be adjusted at any time on-line to characterize stratification across large ducts.

IN SITU FLUE GAS OXYGEN TRANSMITTER COMPLETELY FIELD-REPAIRABLE Diffusion Filter and Sensor Cell Assembly > Outstanding accuracy– + or - .75% of reading or .05% O2 > Special cells for tough service in SO2 and HCL > Rugged steel cell holder – cells will not crack Heater/Thermocouple assembly OPTIONAL Xi The Xi Operator Interface provides a bright back-lit display, easy-to-use keypad in a NEMA 4X (IP 66) enclosure. Dual channel capability provides interface to two probes. Xi Electronics also offers advanced features, including automatic calibration, extended process temperature, plugged diffuser...