| Carbon dioxide | CO2 | NO.2LC | |
|
|
|||
| Performance |
|
Measuring Range |
100 to 2000 ppm |
2000 to 4000 ppm |
|
Number of Pump Strokes |
1 |
1/2 |
|
Correction Factor |
1 |
2 |
|
Sampling Time |
2 minutes per pump stroke |
|
|
Detecting Limit |
20 ppm (n=1) |
|
|
Color Change |
Pale Red |
|
|
Reaction Principle |
CO2+ 2KOH |
|
| Coefficient of Variation |
10% (for 100 to 600 ppm), 5% (for 700 to 2000 ppm) |
|
| Shelf Life | 2 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 |
|
Ammonia |
1000 ppm |
No effect |
No discoloration by 1000ppm |
|
Hydrogen chloride |
500 ppm |
No effect |
No discoloration by 500 ppm |
|
Chlorine |
20 ppm |
No effect |
No discoloration by 10 ppm |
|
HCN, H2S |
100 ppm |
No effect |
No discoloration by 50 ppm |
|
Sulfur dioxide |
25 ppm |
No effect |
No discoloration by 25 ppm |
|
Nitorgen dioxide |
20 ppm |
No effect |
No discoloration by 20 ppm |
| Calibration gas generation | High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 5000ppm | 30000ppm | - |
|
|
| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Yellow
K2CO3+ H2O