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Reference Manual
00809-0100-4303
4
Maintenance
4.1
Cross sensitivities
Certain compounds and or gases can cause a reaction and hence some effects or response
from the sensor.
See
Cross sensitive gases for hydrogen sulfide sensor (Net Safety ST320)
sensitive gases for carbon monoxide sensor (Net Safety ST360)
sensitive gases/compounds. For more information, please contact Net Safety.
Note
The values listed below are typical values and should not be used as a basis for cross
calibration. Cross sensitivities may not be linear and should not be scaled either. The data
provided is based on gassing for a minimum of five minutes using the gas sensor
manufacturer's test equipment. Some cross interference break through will occur if gas is
applied for a longer period of time.
4.1.1
Cross sensitive gases for hydrogen sulfide sensor (Net
Safety ST320)
Table 4-1: Cross-Sensitive Gases/Compounds
Cross sensitive gas
Carbon monoxide
Sulfur dioxide
Nitrogen dioxide
Nitric oxide
Hydrogen
Chlorine
Ethylene
Carbon dioxide
4.1.2
Cross sensitive gases for carbon monoxide sensor (Net
Safety ST360)
Table 4-2: Cross Sensitive Gases/Compounds
Cross sensitive gas
Hydrogen sulfide
Sulfur dioxide
Net Safety ST3
Cross sensitive gas
concentration
300 ppm
5 ppm
5 ppm
50 ppm
100 ppm
1 ppm
100 ppm
5000 ppm
Cross sensitive gas
concentration
15 ppm
5 ppm
Maintenance
November 2020
and
Cross
for a list of these cross
Reading
< 3 ppm
< 1 ppm
< ±0.5 ppm
< 1 ppm
< 1 ppm
0 ppm
0 ppm
0 ppm
Reading
< 0.1 ppm
0 ppm
23
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