MSA PrimaX - Sensor Response to Interferants

The response time t90 will be increased up to 70 seconds by using the Sensor gard.
6.5 Sensor Response to Interferants
Interference factors may differ from sensor to sensor and with life time.
It is not advisable to calibrate with interference gases.
This table does not claim to be complete. The sensor might also be sensitive to other
gases.
Gas Sensor Interferant
Combustible wide variety of combustible gases and vapours
Ammonia [NH
3
] 100ppm
20ppm H
2
S
2ppm
Ammonia [NH
3
] 1000ppm
30ppm Cl
2
5ppm
200ppm H
2
S
120ppm
10ppm NO
2
6.5ppm
200ppm SO
2
-20ppm
Carbon Monoxide [CO]
100ppm NO
69ppm
100ppm H
2
40ppm
100ppm ethanol
4ppm
100ppm NO
2
-5ppm
Chlorine [Cl
2
]
1ppm Br
2
1ppm
2.4ppm ClO
2
0.55ppm
20ppm H
2
S
0.1ppm
10ppm NO
2
4.5ppm
0.25ppm O
3
0.11ppm
Hydrogen [H
2
]
300ppm CO
<60ppm
15ppm H
2
S
<3ppm
35ppm NO
10ppm
10ppm HCN
3ppm
100ppm C
2
H
4
80ppm
Hydrogen Chloride [HCl]
0.2ppm AsH
3
0.7ppm
5ppm Cl
2
< +/- 0.1 ppm
20ppm HCN
7ppm
20ppm H
2
S
60ppm
100ppm NO
45ppm
10ppm NO
2
< +/- 0.5 ppm
39 PrimaX GB
6 Technical Data