ENMET SPECTRUM-RAL-DC - Manual (Page 11)

8
2.2 Interference Gases
Some gases other than CO cause a sensor response, and thus are termed "interference gases". Known
interference gases are as follows:
Gas Concentration Reading
in ppm in ppm
Hydrogen 1,000 100+
Nitric oxide 100 25
The following levels of gases are known to cause no sensor response:
Gas Concentration
Ammonia 100 ppm
Carbon dioxide 5,000 ppm
Chlorine 5 ppm
Ethylene
*
2 %
Gasoline vapor
*
saturated
Hydrogen cyanide 10 ppm
Hydrogen sulfide
*
10 ppm
Isopropanol
*
1,025 ppm
Methane 10,000 ppm
Nitrogen dioxide
*
10 ppm
Sulfur dioxide
*
10 ppm
*For indicated gases or vapors, prolonged exposure may reduce the efficiency of the sensor filter.