一氧化碳气体检测管1La Carbon monoxide    的详细介绍

一氧化碳气体检测管1La Carbon monoxide
Carbonmonoxide                  No.1LA

 

CO

 

 

Performance 

Measuring Range

8 to 12.5 ppm

12.5 to 25 ppm

25 to 500 ppm

500 to 1000ppm

Number of Pump Strokes

3

2

1

1/2

Correction Factor

1/3

1/2

1

2

Sampling Time

2 minutes per pumpstroke

Detecting Limit

2 ppm (n=3)

Color Change

Yellow → Blackishbrown

Reaction Principle

CO +Na2Pd(SO3)2  → Pd + CO2  + SO2+Na2SO3

Coefficient ofVariation10% (for25 to 100 ppm)， 5% (for 100 to 500 ppm)ShelfLife3YearsCorrectionsfor
temperature & humidityTemperature  correction is  necessaryStore the tubes at cool and darkplace.
Possible coexisting substances and theirinterferences(NOTE)

Substance

Concentration

Interference

Change color by itself

Acetylene

1/50 time

Plus error

Discolors darkbrown

Ethylene

2000 ppm

No effect

Discolors whole layerto brown

Hydrogen

5000 ppm

Plus error

Dark brown (wholelayer)(1%)

Sulfurdioxide

1/10 time

Plus error

Discolors blackishbrown

Nitrogendioxide

40 ppm

Plus error

60 ppmNO2  gives redstain

Carbondisulfide

1/50 time

Plus error

Discolors darkbrown

Halogens

1/5 time

Plus error

Discolors darkbrown

Mercaptans

1/5 time

Plus error

Discolors darkbrown

Hydrogensulfide

1/5 time

Plus error

Discolors darkbrown