Carbon monoxide CO NO.1L


Performance

Measuring Range

2.5 to25 ppm

25 to 1000 ppm

1000 to 2000 ppm

Number of Pump Strokes

2 to 10

1

1/2

Correction Factor

1/2 to 1/10

1

2

Sampling Time

1 minute per pump stroke

Detecting Limit

1 ppm (n=10)

Color Change

Yellow Blackish brown

Reaction Principle

CO + Na2Pd(SO3)2 Pd + CO2 + SO2+Na2SO3
Coefficient of Variation 10% (for 25 to 300 ppm), 5% (for 300 to 1000 ppm)
Shelf Life 3 Years
Corrections for
temperature & humidity		 Unnecessary
Store the tubes at cool and dark place.


Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change color by itself

Acetylene

1/50 time

Plus error

Discolors dark brown

Ethylene

2000 ppm

No effect

Discolors whole layer to brown

Hydrogen

5000 ppm

Plus error

Dark brown (whole layer)(1%)

Sulfur dioxide

1/10 time

Plus error

Discolors blackish brown

Nitrogen dioxide

40 ppm

Plus error

60 ppm NO2 gives red stain

Carbon disulfide

1/50 time

Plus error

Discolors dark brown

Halogens

1/5 time

Plus error

Discolors dark brown

Mercaptans

1/5 time

Plus error

Discolors dark brown

Hydrogen sulfide

1/5 time

Plus error

Discolors dark brown


Calibration gas generation High pressure gas cylinder method


TLV-TWA TLV-STEL Explosive range
25ppm - 12.5 to 74%

Copyright(c) 2001 GASTEC CORPORATION. All rights reserved.