ENMET SPECTRUM - Manual (Page 26)

ENMET Corporation SPECTRUM Series
22
SPECTRUM Series for Sulphur Dioxide(4S sensor)
The following gases cause a reading:
Interferant
Gas/Vapor Interferant Concentration
in ppm Instrument Reading
in ppm
carbon monoxide 300 <3
hydrogen sulphide 15 0
nitric oxide 35 0
nitrogen dioxide 5 ≈-5
The following gases or vapors have been tested and do not cause a reading:
Interferant Gas/Vapor Concentration in ppm
chlorine 1
hydrogen 200
hydrogen cyanide 10
hydrogen chloride 5
ethylene 100
SPECTRUM Series for Arsine (2E sensor)
The following gases cause a reading:
Interferant
Gas/Vapor Interferant Concentration
in ppm Instrument Reading
in ppm
phosphine 100 ppb 110
chlorine 5 -400
hydrogen cyanide 10 100
ammonia 100 10
diborane 100 35
silane 1 100
germane 1.1 100
hydrogene selenide 50 ppb 5
The following gases or vapors have been tested and do not cause a reading:
Interferant Gas/Vapor Concentration in ppm
hydrogen sulfide 1*
sulfur dioxide 2
hydrochloric acid 5
carbon monoxide 300
carbon dioxide 5000
nitrogen 100 %
hydrocarbons % range
hydrogen 1000
*with onboard filter; continuous high level exposure may reduce the filter efficiency