AQ EXPERT Instruction & Operations Manual
Version 1.13
Page 16 of 63
CHAPTER 5
SENSORS - TECHNICAL
The great versatility of the AQ Expert Air Quality monitor is partly due to the large
number of sensors available within a single monitor.
These sensors are primarily gas sensors and can be grouped into four categories based
on their principle of operation:
1. Six (6) electrochemical gas sensors*
2. One (1) NDIR (infrared gas sensors)
– CO2
3. One (1) Photo ionization detector (PID gas sensor) - VOC
4. Non-gas sensors (Temperature, Velocity, Humidity, Pressure, and
Barometric pressure) sensors
*
NOTE
: When O
3
(Ozone) sensor is installed the AQ Expert can include O
3
+ NO
2
OR
O
3
+ SO
2
. The unit can
NOT
have all three (3) sensors (O
3
+ NO
2
+ SO
2
)
together simulatenously.
The main section of the monitor that houses all the electrochemical, NDIR, and PID gas
sensors, battery pack, and PC board. On the face of the unit, the external sampling
system or Ambient Temperature, Relative Humidity, and Barometric Pressure.
The figure below shows the location of the gas sensors on their housing:
SENSOR
LIST
:
CO
2
CO
VOCs
NO
NO
2
SO
2
H
2
S
CH
2
O
O
2
O
3
