5 Appendices continued
APPENDIX B:
SENSOR AND TARGET GAS
I
N
T E R F E R E N C E
G A S E S
| Br2 | Cl2 | ClO2 | O3 | NH3 | CO | H2 | O2 | NO | H2S | NO2 | SO2 | HCHO | OH | Fl2 | HCl | H2O2 |
Bromine | 1.0 | 1.0 | 0.7 | None | None | None | None | None | 0.5 | None | None | 1.0 | None | None | |||
Chlorine | 1.0 | 1.0 | 0.7 | None | None | None | None | None | 0.5 | None | None | 1.0 | None | None | |||
Chlorine dioxide | 1.0 | 1.0 | 0.7 | None | None | None | None | None | 0.5 | None | None | 1.0 | None | None | |||
Ozone | 1.5 | 1.5 | 1.5 | None | None | None | None | None | 0.65 | None | None | 1.5 | None | None | |||
Ammonia | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | |
Carbon monoxide | None | None | None | None | 0.05 | 0.1 | None | None | 0.002 | 0.001 | None | 0.5 | 0.5 | None | 0.005 | 0.005 | |
Hydrogen | None | None | None | None | 0.02 | 0.1 | None | 0.001 | 0.001 | 0.001 | 0.005 | 0.05 | 0.05 | None | 0.01 | 0.01 | |
Oxygen | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | |
Nitrogen oxide | None | None | None | None | None | 0.1 | None | None | 0.4 | 0.001 | 0.04 | 0.8 | 0.8 | None | 1.5 | 1.5 | |
Hydrogen sulfide | 0.3 | None | None | None | None | None | 2 | 2 | 3 | 4 | |||||||
Nitrogen dioxide | 0.2 | 0.2 | 0.2 | 0.15 | None | None | None | None | None | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | ||
Sulfur dioxide | None | None | None | None | 0.1 | 0.4 | 0.4 | 0.5 | 1 | ||||||||
Formaldehyde | None | None | None | None | 0.03 | 0.1 | 0.1 | None | 0.05 | 0.01 | None | 0.02 | 1.2 | None | None | 0.1 | |
Alcohol | None | None | None | None | 0.03 | 0.1 | 0.1 | None | 0.05 | 0.01 | None | 0.02 | None | None | None | 0.1 | |
Flourine | 1.0 | 1.0 | 1.0 | 0.7 | None | None | None | None | None | 0.5 | None | None | None | None | |||
Hydrochloric acidNone | None | None | None | None | None | None | None | None | None | None | 0.2 | 0.2 | None | 0.1 |
| ||
Hydrogen peroxide | None | None | None | None | 0.03 | 0.1 | 0.1 | None | 0.05 | 0.01 | None | 0.02 | None | None | None | None | |
Hydrogen cyanide | 0.1 | None | None | None | None | 0.15 | 0.1 | 0.1 | 0.01 | 0.1 | |||||||
Hydroflouric acid | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None |
Hydride | None | None | None | None | 0.5 | None | None | None | 1 | 0.5 | 2 | 2 | 2 | None | 1.5 | 2 | |
Silica hydride | None | None | None | None | 0.5 | None | None | None | 1 | 0.5 | 2 | 2 | 2 | None | 1.5 | 2 | |
Carbon dioxide | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None |
Methane | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None |
Carbosulfonic acid | None | None | None | None | 0.3 | None | 1 | 1 | 1 | 1.3 | |||||||
Ethylene | None | None | None | None | None | 0.1 | 0.1 | None | None | None | None | None | 1 | 1 | None | None | None |
Ethyl alcohol | None | None | None | None | 0.01 | None | None | None | 0.001 | 0.005 | 0.001 | 0.05 | 2 | 2 | None | 0.01 | 0.02 |
Notes: 1) None means there is no interference.
2)A number indicates that when exposed to the interference gas, the sensor will react the specified amount for a given
concentration. For example, on the first line of the table above, if the NO2 sensor is exposed to 1 ppm Bromine (Br2), the sensor will read 0.5 ppm. This interference is in addition to the target gas present.
For example, if an NH3 sensor is exposed to 1 ppm NH3 and 1 ppm Br2 at the same time, the reading will be 0.9 ppm (1ppm NH3 +
Manning | 16 |
