Vạch chỉ thị: 20 ~ 800 ppm
Thang đo: 20 ~ 800 ppm , bơm 2 lần
Thời gian lấy mẫu: 2 phút mỗi lần bơm
Chuyển đổi màu: Yellow → Blackish brown → Light blue after few minute
Phương trình phản ứng: CH3CO2C2H5 + Cr6+ + H2SO4 → Cr3+
Hệ số biến đổi: 15% (20 ~ 200 ppm), 10% (200 ~ 800 ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
20 to 800 ppm |
| Number of Pump Strokes |
2 |
| Correction Factor |
1 |
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
5 ppm (n=2) |
| Colour Change |
Yellow → Blackish brown → Light blue after few minute |
| Reaction Principle |
CH3CO2C2H5 + Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation |
15% (for 20 to 200 ppm), 10% (for 200 to 800 ppm) |
| Shelf Life |
2 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 |
|
+ |
Dark green |
| Ketones |
|
+ |
Dark green |
| Esters |
|
+ |
Dark green |
| Aromatic HCs |
|
+ |
Dark green |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Cymene |
Factor: 0.28 |
2 |
5.6 to 224 ppm |
| Diisopropyl benzene |
Factor: 0.5 |
1/2 |
10 to 400 ppm |
| Ethyl acrylate |
Factor: 0.4 |
2 |
8 to 320 ppm |
| 2-Hexyl alcohol |
Factor: 3.0 |
3 |
60 to 2400 ppm |
| Isopropyl ether |
Factor: 0.9 |
2 |
18 to 720 ppm |
| Mesityl oxide |
Factor: 1.35 |
2 |
27 to 1080 ppm |
| Methyl acrylate |
Factor: 0.4 |
2 |
8 to 320 ppm |
| Methyl Isothiocyanate |
by scale |
2 |
50 to 400 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 400 ppm(2014) |
- |
2 to 11.5% |
