Indicator: 0.02 to 1.5%
Measuring Range:
+ 0.002 to 0.004%, Number of Pump Strokes 4
+ 0.004 to 0.02%, Number of Pump Strokes 2
+ 0.02 to 1.5%, Number of Pump Strokes 1
+ 1.5 to 4.5%, Number of Pump Strokes 1/2
Sampling Time: 1 minute per pump stroke
Colour Change: Pink → Pale blue
Reaction Principle: CH3OH + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 15% (for 0.02 to 0.5 %), 10% (for 0.5 to 1.5 %)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
0.002 to
0.004% |
0.004 to
0.02% |
0.02 to
1.5% |
1.5 to
4.5% |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.0004% (n=4) |
| Colour Change |
Pink → Pale blue |
| Reaction Principle |
CH3OH + Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation |
15% (for 0.02 to 0.5 %), 10% (for 0.5 to 1.5 %) |
| 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 |
| Alcohols |
|
+ |
Pale blue |
| Carbon dioxide |
|
No |
No |
| Carbon monoxide |
|
No |
No |
| sulphur dioxide |
|
No |
No |
| Calibration gas generation |
Static gas dilution method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 200 ppm |
250 ppm |
6 to 36% |
