User's Manual

2-3
Reference channel is
used for indirect
measuring of the
initial intensity of
light, and allows to
eliminate actual
measurements
conditions (total
transparency of gas
volume, optics
imperfection and so
on).
In Fig. 2.2 the
example of spectral
bands of light
emitters for methane
analyzer is shown.
The detailed description of the optocomponent is given
in Chapter 3.
In Fig. 2.3 the spectral bands of light emitters of the
optopair are given in comparison with methane
absorption spectra.
Theory of Operation
RMT LtdRMT Ltd
RMT LtdRMT Ltd
DX6106
Fig. 2.3. Spectral bands of light
emitters and methane
0
0.5
1.0
2.0 3.0 4.0
Reference
channel
Measuring
channel
Emission band
2.0 3.0 4.0
0
0.5
1.0
Relative absorption
Methane
Wavelength, mµ