| Carbon monoxide | CO | NO.1LL |
|
|
||
| Performance |
|
Measuring Range |
5 to 50 ppm |
|
Number of Pump Strokes |
2 |
|
Correction Factor |
1 |
|
Sampling Time |
2 minutes per pump stroke |
|
Detecting Limit |
1 ppm (n=2) |
|
Color Change |
Yellow |
|
Reaction Principle |
CO + Na2Pd(SO3)2 |
| Coefficient of Variation | 15% (for 5 to 10 ppm), 10% (for 10 to 50 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 |
Produces dark brown stain |
|
Sulfur dioxide |
1/10 time |
Plus error |
Produces dark brown stain |
|
Nitrogen dioxide |
40 ppm |
Plus error |
Produces red stain |
|
Hydrogen sulfide |
1/5 time |
Plus error |
Produces dark brown stain |
| 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. |
Blackish brown
Pd + CO2 + SO2+Na2SO3