ABB Endura AZ20 Oxygen Monitor Combustion Gas Analysis Flow Restrictors

Flow Rate Control using Flow Restrictors

The flow rates of test gas and reference air are important to the

accurate operation of Zirconia-based oxygen analyzers and,

traditionally, control has been achieved using ancillary

flowmeters and flow control valves.

The Endura AZ20 offers a new approach with the inclusion of

optional flow restrictors. These are fitted within the probe to

control the flow rate of the reference air and test gasses,

removing the need for additional flowmeters fitted with flow control valves.

This innovative approach enables the gasses to be controlled by

pressure only. 1 Bar (15 psi) is applied directly to the probe’s gas

ports and the correct flow rate is then set by the flow restrictors.

Unique Integrated Automatic Calibration

The all new Endura AZ20 automatic calibration system

eliminates the need for the expensive ancillary equipment

required for automatic calibration on traditional flue gas oxygen

analyzer systems. ABB’s fully integrated, automatic calibration

feature controls the test gas sequence and detects test gas

availability, eliminating incorrect calibrations due to loss of test gas.