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Introduction
1.5.1
Particulate filter
The Particulate filter is a Teflon 5 micron (µm) filter with a diameter
of 47mm. This filter eliminates all particles larger than 5µm that could
interfere with sample measurement. There are two particulate filters
fitted within the analyser one on the NO/NO
N
line.
x
1.5.2
Delay Loop
The delay loop is a coil of sample tubing which increases the length of
time sample air takes to travel to the NO
measurement chamber. This delay allows the sample from the NO
channel to be measured before the sample from the NOx channel
arrives there.
1.5.3
Molycon Converter
The molycon converter uses high temperatures (325ºC) and
Molybdenum chips to convert any NO
conversion is used for NO
NO
.
2
The molybdenum converter assembly also houses a catalytic ozone
destroyer that removes ozone from the instrument exhaust.
1.5.4
Valve Manifold
The valve manifold switches between sample gas, calibration and
background gas.
1.5.5
Sample Valve Manifold
The sample valve manifold switches sample gas between NO, NO
and N
X
1.5.6
Pressure Transducers
Two pressure transducers are used for the calculation of sample flow
rate, one is located upstream to the critical orifices (ambient) and the
other is located in the reaction cell downstream of the critical orifice
(gas pressure).
1.5.7 HTO 1000N external thermal converter (optional)
The HTO 1000N thermal oxidizer employs both catalytic and thermal
principles in the conversion of NH
between 88-94% at a temperature of 680°C.
The HTO 1000N is connected to the Serinus 44 analyzer through the
Auxiliary port (on the rear of the analyzer, see section 2.3.1 for more
details).
6
measurements as well as the calculation of
X
channels along with background and bypass flow.
Serinus 44 User manual 1.0
line and the other on the
x
-NO converter and the
2
in the sample to NO. This
2
to NO. Converter efficiency is
3
X
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