Figure 8-2. Hardware Components (High Level) - Thermo Scientific 410i Instruction Manual

Flow Transducer
O2 Sensor
(Optional)
Thermistor
Front Panel
Front Panel Board
Power Supply
Optical Bench
Band-pass Filter
Bench Heater Board
Thermo Fisher Scientific
Pump
Pressure Transducer
Measurement Interface Board
Figure 8–2. Hardware Components (High Level)
The optical bench is an airtight chamber that contains the sample gas. The
bench includes mirrors that cause the infrared light from the infrared
source to pass through the sample gas multiple times before reaching the
infrared detector.
The band-pass filter limits the light entering the optical bench to a narrow
band of the infrared portion of the spectrum.
The bench heater board applies power to the bench heater resistors and
transmits the bench temperature monitored by a thermistor. This assembly
is used for maintaining the optical bench at a constant temperature.
Motor and Wheel Assy
Motherboard
System Description
Hardware
Fan
IR Source Cover
Detector Assy
and Pre-Amp
I/O Expansion Board (Opt)
Digital Output Board
Model 410i Instruction Manual 8-3