Honeywell ec-p2 Weather Radio User Manual


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5 Appendices continued
APPENDIX B: SMART-CELL Cross-Sensitivity Table (Interference Gases)
Manning EC-P2 Sensor 19546 ECP2 07/09 REVG Copyright © 2009 Honeywell Analytics. All Rights Reserved. 16
SENSOR AND TARGET GAS
Br2 Cl2 ClO2 O3 NH3 CO H2 O2 NO H2S NO2 SO2 HCHO OH Fl2 HCl H2O2
Bromine ----- 1.0 1.0 0.7 -0.1 None None None None None 0.5 -0.1 None None 1.0 None None
Chlorine 1.0 ----- 1.0 0.7 -0.1 None None None None None 0.5 -0.1 None None 1.0 None None
Chlorine dioxide 1.0 1.0 ----- 0.7 -0.1 None None None None None 0.5 -0.1 None None 1.0 None None
Ozone 1.5 1.5 1.5 ----- -0.1 None None None None None 0.65 -0.1 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 -0.1 -0.1 -0.1 -0.07 0.3 None None None None ----- -2.5 None 2 2 -0.1 3 4
Nitrogen dioxide 0.2 0.2 0.2 0.15 None None None None None 0.1 ----- -0.08 0.1 0.1 0.2 0.2 0.2
Sulfur dioxide -0.01 -0.01 -0.01 -0.01 None None None None None 0.1 -1 ----- 0.4 0.4 -0.01 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 -0.1 None None None None None 0.5 -0.1 None None ----- None None
Hydrochloric acid None None None None None None None None None None -0.3 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 -0.08 -0.08 -0.08 -0.05 None 0.1 None None None None -0.07 0.15 0.1 0.1 -0.08 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 2 None 1.5 2
Silica hydride None None None None 0.5 None None None 1 0.5 -2 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 -0.04 -0.04 -0.04 -0.03 None None None None None 0.3 -0.8 None 1 1 -0.04 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
I
N
T
E
R
F
E
R
E
N
C
E
G
A
S
E
S
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 NO
2
sensor is exposed to 1 ppm Bromine (Br
2
),
the sensor will read 0.5 ppm. This interference is in addition to the target gas present.
For example, if an NH
3
sensor is exposed to 1 ppm NH
3
and 1 ppm Br
2
at the same time, the reading will be 0.9 ppm
(1ppm NH
3
+ -0.1 ppm Br
2
= 0.9 ppm reading).
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