| CO |
 |
Performance
| Measuring Range |
| 0.05 to 0.1% |
0.1 to 2.0% |
2.0 to 4.0% |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.01% (n=2) |
| Colour Change |
White → Pale brown |
| Reaction Principle |
5CO + I2O5 + H2S2O7 → I2 |
| Coefficient of Variation |
10% (for 0.1 to 0.5 %), 5% (for 0.5 to 2 %) |
| 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 colour by itself to |
| Acetylene |
0.1% |
+ |
Brown |
| Olefins |
2/3 time |
+ |
Pale brown |
| Butane |
0.3% |
+ |
Pale brown (whole layer) |
| Propane |
10% |
+ |
Pale brown (whole layer) |
| Hexane |
0.1% |
+ |
Pale brown |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
- |
12.5 to 74% |
