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Infrared Gas Analyzer Installation
Teledyne Analytical Instruments 31
• Solenoid Valve—for introducing calibration gas and
OFF/ON flow of sample gas.
• Membrane Filter—PTFE filter for rempval of fine dust
particles.
• Flowmeter—adjusts and monitors the sample gas flowrate.
• Standard Gas—a bank of calibration gases used for setting
zero and span of the analyzer for each species monitored.
• Zirconia Sensor— an external zirconia sensor is used for
measuring the oxygen concentration in the sample gas. Some
instruments use a built-in paramagnetic oxygen sensor
instead aof an external zirconia sensor.
• NO
2
/NO Converter—added to the NO analysis circuit which
uses an efficient catalyst for converting NO
2
to NO for
analysis.
Figure 2-8: Five-Component Analysis System