Indicator: 2 to 25 ppm
Measuring Range:
+ 2 to 25 ppm, Number of Pump Strokes 4
+ 25 to 100 ppm, Number of Pump Strokes 1
Sampling Time: 30 seconds per pump stroke
Colour Change: White → Yellow
Reaction Principle: C6H5CH:CH2+ H2S2O7 → Condensation Polymer
Coefficient of Variation: 10% (for 2 to 5 ppm), 5% (for 5 to 25 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 2 to 25 ppm |
25 to 100 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
30 seconds per pump stroke |
| Detecting Limit |
0.5 ppm (n=4) |
| Colour Change |
White → Yellow |
| Reaction Principle |
C6H5CH:CH2+ H2S2O7 → Condensation Polymer |
| Coefficient of Variation |
10% (for 2 to 5 ppm), 5% (for 5 to 25 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 |
| Alcohols, Esters |
 10 times |
+ (Bleaching) |
No |
| Aldehydes, Ketones |
10 times |
+ (Bleaching) |
No |
| Butadiene |
5 ppm |
+ (Bleaching) |
Dark brown |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Divinyl benzene |
0.6 |
3 |
1 to 15 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 20 ppm(2014) |
40 ppm(2014) |
1.1 to 6.1% |
