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Portable Emissions Monitor Operational Theory

Teledyne Analytical Instruments 5

Operational Theory

2.1 Introduction

The PEM-9004 uses state-of-the-art sensor technology for accurate

measurements of O

, CO/H

, CO-high and optionally, NO and SO

. The

sensors employed are electrochemical cells specific for each component.

The instrument will measure and display the actual gas

concentration for O

and CO(H

). Depending on the options selected at

the time of purchase, the PEM-9004 can also measure and display the

NO, CO (high), and SO

concentration of a flue gas. The analyzer, based

on measurements of draft pressure, temperature, and data entered for the

combustion fuel plus pertinent thermodynamic data internally stored as

part of the instrument’s database, will calculate and display the

following combustion related information:

• CO

concentration

• Non-diluted CO concentration

• Pressure and temperature differential

• Efficiency (Eta)

• Waste gas losses (qA)

• NOx concentration

• Dew point

• Eta combustion value

2.2 Sensor Cell

At the heart of the analyzer are the sensors. Up to 5 sensor cells are

installed depending on the options selected at the time of purchase. Each cell

is specific to a particular gaseous component.

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