ENMET EN Series - Manual (Page 10)

Sensor/Transmitter, Toxic Gas & Oxygen ENMET Corporation
8
Appendix A: Interference Table
For Selected Sensors
Ammonia (3E-100 sensor)
The following gases cause a reading:
Interferant
Gas/Vapor Interferant Concentration
in ppm Instrument Reading
in ppm
ethanol 1000 1
isopropanol 450 1
hydrogen sulfide 14 10
methanol 1200 3
hydrogen 1000 80
carbon monoxide 300 100
sulfur dioxide 25 -21
nitrogen dioxide 50 25
hydrogen cyanide 10 -18
The following gases or vapors have been tested and do not cause a reading:
Interferant Gas/Vapor Concentration in ppm
chlorine 5
unsaturated hc (ethylene) 1.0 %
saturated hydrocarbons abundant
Carbon Monoxide (3E sensor)
The following gases cause a reading:
Interferant
Gas/Vapor Interferant Concentration
in ppm Instrument Reading
in ppm
hydrogen 1000 450
nitric oxide 100 25
The following gases or vapors have been tested and do not cause a reading:
Interferant Gas/Vapor Concentration in ppm
ammonia 100
chlorine 5
hydrogen cyanide 10
ethylene 2.0 % *
carbon dioxide 5,000
methane 10,000
sulfur dioxide 10 *
hydrogen sulfide 10 *
nitrogen dioxide 10 *
isopropanol 1,025 *
gasoline vapor saturated *
* With onboard filter; continuous high level exposure may reduce the filter efficiency