| CH3OH |
 |
Performance
| Measuring Range |
| 20 to 40 ppm |
40 to 1000 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
4 minutes per pump stroke |
| Detecting Limit |
5 ppm (n=2) |
| Colour Change |
Pink → Pale blue |
| Reaction Principle |
CH3OH + Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation |
15% (for 40 to 200 ppm), 10% (for 200 to 1000 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Ethylene Chlorohydrine |
by scale |
3 |
20 to 200 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 200 ppm |
250 ppm |
6 to 36% |
