Bacharach 24-7224 Instruction

Introduction

The Bacharach Flue-Gas Sample Conditioning System consists of the 

following components:

•  Probe with Peltier Cooler

•  Condensate Pump with Water Trap

•  Power Supply

The function of this system is to remove water vapor from the flue-gas 

sample, thus preventing the formation of water droplets inside the 

probe hose. If water droplets were to form inside the hose, a portion of 

the gas sample could be absorbed by the water, thus resulting in lower-

than-actual readings of NO

2

 and SO

2

.

Water vapor is removed from the flue-gas sample by passing the sample 

through a Peltier Cooler where the sample is chilled, which in turn, 

causes the water vapor contained in the gas sample to be removed from 

the sample. 

The water that was extracted from the gas sample is then pumped out 

of the Peltier Cooler and into a water trap. 

The now dry, conditioned flue-gas sample is then sent to its associated 

combustion test equipment for analysis.

Product Leadership • Training • Service • Reliability

Figure 1.  Flue-Gas Sample Conditioning System

Probe w/ Peltier Cooler

Power Supply

Instruction 24-9415

Flue-Gas Sample  

Conditioning System

P/N 24-7224

Rev. 5 – June 2005

Pump 

w/ Water Trap