E8500 Instruction & Operations Manual
version 1.017
Page 15 of 49
CHAPTER 5 - TECHNICAL
SAMPLE FLOW & SAMPLE CONDITIONING SYSTEM
PART A. THE EXTRACTION PROBE AND SAMPLING LINE
A number of different types of probes are available depending on the application
requirements. The probe consists of the extraction probe, the sampling line and the
stack thermocouple.
1. Medium temperature probe and sampling line. This standard probe is
suitable for temperatures up to 800ºC/1470ºF.
2. High temperature probe and sampling line. This probe uses an inconel
extraction probe suitable for temperatures up to 1200ºC/2200ºF and very
low NO
2
and SO
2
loss sampling line suitable for emissions measurements.
Different extraction probe and sampling line lengths are available on
request.
The end of the probe’s sampling line connects to the SAMPLE IN quick disconnect
connector of the analyzer and the thermocouple connector connects to
TEMPERATURE STACK input of the analyzer.
Pitot tube –
This optional part consists of stainless steel tubing with the tips open and
bent at a certain angle according to the EPA specifications of 40CFR60 Appendix A,
Method 2 for measuring stack gas velocities. The S-Type Pitot tube must always be
oriented with the open tips parallel to the direction of the stack gas flow. Care must be
taken to keep the tubes from getting clogged by soot particles. The end of the Pitot tube
assembly is connected by means of two flexible hoses to a very accurate pressure
transducer located inside the analyzer.
PART B. THE SAMPLE CONDITIONING SYSTEM
The purpose of the sample conditioning system is to remove the excess condensation
from the extracted stack gas sample and also to remove soot particles. The exhaust
sample contains typically between 5% and 20% of water vapor, most of which will
condense in the probe and sample line.
