Product Description
GMS800 · Operating Instructions · 8013025 V1.2 · © SICK MAIHAK GmbH 15
Subject to change without notice
2.2 Functional principle/application principle
GMS800 is an extractive gas analyzer with continuous measuring operation:
● Extractive gas analysis means that a certain quantity of the gas to be analyzed is
extracted from the original quantity of the gas (“sample gas” from the “sampling point”)
and then fed to the gas analyzer via a gas line.
● Continuous measurement means that a continuous sample gas volume flow to the gas
analyzer is maintained and the gas analyzer continuously delivers measured values.
● Sample gas conditioning is required for most applications. Depending on the individual
application, suitable devices can be:
Fig. 2 Extractive gas analysis principle
Particle filters To protect the gas analyzer’s measuring system against
contamination
Heated sample gas lines To prevent condensation and ice blockages inside the
sample gas path
Liquid separators To separate any liquids or condensable components
from the sample gas
Safety devices To protect the gas analyzer and the peripheral system
against each other (e.g. flame blocks in the gas path)
Operating conditions for sample gas feed
→
Supplementary Operating Instruc-
tions for the Analyzer Modules fitted
A Sampling point
B Extracted sample gas
C Sample gas conditioning
D Gas analyzer
B
A C D
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