Advanced Electronics for Zirconium Oxide Oxygen Probes
This versatile electronics package is specifically designed to run most O2 probes manufactured. The large backlit LCD display makes it easy to set up and operate. Fully automatic calibrations may be executed from this electronics with the addition of a small solenoid box for switching calibration gases.

Automatic Calibration
Plant personnel often ask how frequently an oxygen analyzer requires calibration. The answer is very application-dependent based upon the fuels being burned, normal levels of oxygen and the sulfur content in the flue gases. The Xi addresses this concern by providing an on-line diagnostic that determines when a calibration should be conducted, eliminating many unneeded calibrations and the technician and gas resources they consume.

Extended Process Temperature Range - Traditional O2 electronics will go into alarm if the process temperature exceeds the controlled heater temperature. This feature enables the Xi to turn off the internal heater in this event, use the process temperature to heat the cell, and calculate O2 on the fly from the changing process temperatures. Note that accelerated probe and cell damage may occur as a result of extended operation above 800°C (1462°F), but at least the measurement will not go off-line during this event.

Stoichiometer - Process upsets can sometimes cause a combustion process to go into substoichiometric or reducing conditions. The oxygen readings from one or more probes may decline all the way to zero. The stoichiometer cell will measure the amount of oxygen deficiency during these reducing conditions..

Programmable Reference – enhances operation for the following applications:

Moisture Monitoring – measuring the amount of moisture coming off of industrial dryers by noting the dilution effect water vapor has on the normal 20.95% ambient drying air.

Enriched Oxygen Combustion – Pure oxygen is sometimes mixed in with the combustion air to increase heat at the flame. This is used in steel and other metals reduction processes and also in some catalyst regenerators.

Flame Safety Interlock – dry contact from a flame safety system removes power from the probe heater in a loss-of-flame event.