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AQM Gas Module Specifications
Gas Module |
Sensor Technology
(4) |
Calibrated Range
(ppm) |
Lowest Detection Rate
(ppm) |
Zero Drift (5)
(ppm) |
Span Drift (6) (% of reading) |
Accuracy of
Calibration |
Precision (7) (ppm) |
Response
Time (T80) |
24 hr |
30 day |
24 hr |
30 day |
CO |
GSS |
0-25 |
0.1 |
<1 |
<2 |
<10% |
<20% |
±1 ppm |
0.2 |
<180 s |
CO2 |
NDIR |
0-2000 |
6 |
<10 |
<10 |
<5% |
<10% |
±40 ppm + 3% |
6 |
<120 s |
H2S |
GSS |
0-10 |
0.01 |
<0.2 |
<1 |
<10% |
<20% |
±0.5 ppm |
0.03 |
<120 s |
O3 |
GSS |
0-0.150 |
0.001 |
<0.002 |
<0.008 |
<5% |
<10% |
±0.005 ppm |
0.002 |
<120 s |
O3 |
GSS |
0-0.500 |
0.001 |
<0.003 |
<0.010 |
<5% |
<10% |
±0.008
(>0.1 ppm)
±10%
(<0.1 ppm) |
0.005 |
<120 s |
NO2 |
GSS |
0-0.200 |
0.001 |
<0.005 |
<0.015 |
<10% |
<20% |
±0.01
(>0.1 ppm)
±10%
(<0.1 ppm) |
0.005 |
<180 s |
NMHC (1) |
GSS |
0-25 |
0.1 |
<0.2 |
<2 |
<10% |
<20% |
±10%
(>0.1 ppm) |
0.2 |
<120 s |
PID (2) |
PID |
0-20 |
0.01 |
<0.02 |
<0.1 |
<5% |
<15% |
<10% |
0.02 |
<120 s |
SO2 |
GSS |
0-10 |
0.2 |
<0.2 |
<2 |
<10% |
<20% |
±0.5 ppm |
0.2 |
<120 s |
VOC (3) |
GSS |
0-25 |
0.1 |
<0.2 |
<2 |
<10% |
<20% |
±10%
(>0.1 ppm) |
0.2 |
<120 s |
- Non Methane Hydrocarbon sensor (lower sensitivity to alcohols and esters)
- Photo Ionisation Detector (calibrated to isobutylene)
- Volatile Organic Compounds (calibrated to isobutylene)
- Gas Sensitive Semiconductor (GSS) | Non Dispersive Infra red (NDIR) | Photo Ionisation Detector (PID)
- Zero Drift at constant temperature and relative humidity
- Reading at 50% fullscale range
- Maximum standard deviation of three consecutive readings
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AQM Gas Module Cross-Sensitivity
AQM Gas Modules may exhibit a response to certain gases in a sample other than the target gas. Typical responses are shown below. Individual results may vary.
|
AQM Gas Module (Reading / ppm) |
Test Gas |
CO |
H2S |
NMHC |
NO2 |
O3 |
SO2 |
VOC |
Ammonia |
10 ppm |
<0.1 |
<0.1 |
0.5 |
-0.02 |
-0.01 |
3 |
3 |
Butane |
10 ppm |
<0.1 |
0 |
0 |
0 |
0 |
0 |
0 |
Carbon monoxide |
10 ppm |
10 |
0 |
0.4 |
0 |
0 |
0.8 |
1 |
Carbon dioxide |
1000 ppm |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Chlorine |
1 ppm |
0 |
0 |
0 |
0.2 |
0.05 |
-0.2 |
-0.2 |
Ethanol |
5 ppm |
0 |
0.5 |
<0.1 |
-0.05 |
-0.01 |
60 |
80 |
Hydrogen |
50 ppm |
25 |
0 |
0.5 |
0 |
0 |
1.0 |
1.2 |
Hydrogen sulphide |
1 ppm |
<0.1 |
1 |
0.3 |
-0.08 |
-0.03 |
10 |
13 |
Isobutylene |
10 ppm |
0 |
<0.1 |
10 |
-0.005 |
0 |
8 |
10 |
Methane |
100 ppm |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Nitrogen dioxide |
0.1 ppm |
0 |
0 |
0 |
0.1 |
<0.005 |
0 |
<-0.1 |
Ozone |
0.1 ppm |
0 |
0 |
0 |
<0.005 |
0.1 |
-0.2 |
-0.1 |
Perchloroethylene |
20 ppm |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Propane |
100 ppm |
<0.1 |
0 |
1 |
-0.005 |
0 |
1 |
1 |
Sulphur dioxide |
1 ppm |
<0.5 |
<0.1 |
2 |
0 |
0 |
1 |
0.8 |
Toluene |
5 ppm |
0 |
<0.1 |
7 |
-0.005 |
0 |
5 |
7 |
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