5 Appendices continued

5 Appendices continued

APPENDIX B: SMART-CELL Cross-Sensitivity Table (Interference Gases)

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

-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 acidNone

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

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 + -0.1 ppm Br2 = 0.9 ppm reading).

Manning EC-P2 Sensor 19546 ECP2 07/09 REVG Copyright © 2009 Honeywell Analytics. All Rights Reserved.

16

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Honeywell Manning EC-P2 installation manual Appendices continued, I N T E R F E R E N C E G A S E S

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