Figure 8-1. Hardware Components; No 2 -To-No Converter - Thermo Scientific 42i Instruction Manual

System Description
NO2-to-NO Converter
Pressure Transducer
Input Board
Thermistor
Measurement
Interface Board
Power Supply
NO
Converter
Mode Solenoid
Reaction Chamber
8-2 Model 42i Trace Level Instruction Manual
Converter
Figure 8–1. Hardware Components
-to-NO
The NO
2
order to convert and detect NO
housing, heater, replaceable cartridge, and a type K thermocouple sensor.
The mode solenoid valve switches analyzer operation between the NO
mode and NO
reaction chamber (NO mode) or through the NO
then to the reaction chamber (NO
The reaction chamber is where the sample reacts with ozone and produces
excited NO
The reaction chamber is heated and controlled to approximately 50 °C in
order to ensure the greatest instrument stability. The sample and ozone
flow capillaries and a thermistor sensor are also housed in/on the reaction
chamber assembly.
Flow
Transducer
Flow
Switch
Ozonator Solenoids (3)
Transformer
-to-NO converter heats molybdenum to approximately 325 °C in
2
mode. It routes the ambient air sample either through the
x
that gives off a photon of energy when it decays.
2
Reaction
PMT Assembly
Chamber
Motherboard Digital Output Board
. The converter consists of an insulated
2
-to-NO converter and
2
mode).
x
Capillaries (2)
Prereactor
Fan
I/O Expansion
Board (Opt)
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