Indicator: 20 to 250 ppm
Measuring Range:
+ 5 to10 ppm, Number of Pump Strokes 2
+ 10 to 250 ppm, Number of Pump Strokes 1
+ 250 to 625 ppm, Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Brown
Reaction Principle: C6H4(CH3)2 + I2O5 + H2SO4 → I2
Coefficient of Variation: 10% (for 10 to 50 ppm), 5% (for 50 to 250 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 5 to10 ppm |
10 to 250 ppm |
250 to 625 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
| 1.5 minutes per pump stroke |
1 minute |
|
| Detecting Limit |
1 ppm (n=2) |
| Colour Change |
White → Brown |
| Reaction Principle |
C6H4(CH3)2 + I2O5 + H2SO4 → I2 |
| Coefficient of Variation |
10% (for 10 to 50 ppm), 5% (for 50 to 250 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 colour by itself to |
| Carbon Monoxide |
≦ 1000 ppm |
No(Two layers) |
Pale brown
(Whole layer) |
| Acetylene, Hexane |
≦ 2000 ppm |
No(Two layers) |
Pale brown
(Whole layer) |
| Toluene |
≧ 1/5 |
+ |
Brown |
| Benzene |
≧ 1/5 |
+ |
Pale yellow |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Trimethylbenzene |
by scale |
2 |
10 to 300ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 100 ppm(2014) |
150 ppm(2014) |
1.0 to 7.0% |
