Vạch chỉ thị: 0.5 ~ 10 ppm
Thang đo:
+ 0.1 ~ 0.25 ppm, bơm 4 lần
+ 0.25 ~ 10 ppm, bơm 2 lần
+ 10 ~ 25 ppm, bơm 1 lần
Thời gian lấy mẫu: 2 phút mỗi lần bơm
Chuyển đổi màu: Xanh tím → Trắng
Phương trình phản ứng: SO2 +I2 +2H2O → H2SO4 + 2HCl
Hệ số biến đổi: 10% (0.25 ~ 2 ppm), 5% (2 ~ 10 ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.1 to 0.25 ppm |
(0.25) to 10 ppm |
10 to 25 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.02 ppm (n=4) |
| Colour Change |
Bluish purple → White |
| Reaction Principle |
SO2 +I2 +2H2O → H2SO4 + 2HCl |
| Coefficient of Variation |
10% (for 0.25 to 2 ppm), 5% (for 2 to 10 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 |
| Nitrogen dioxide |
|
(Unclear demarcation) |
Brown (approx.1mm long from the inlet) |
| Hydrogen sulphide |
≧ 1/10 |
+ |
White |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
0.25 ppm (2014) |
- |
