Vạch chỉ thị: 5 ~ 100 ppm
Thang đo:
+ 1.25 ~ 2.5 ppm, bơm 4 lần
+ 2.5 ~ 5 ppm, bơm 2 lần
+ 5 ~ 100 ppm, bơm 1 lần
+ 100 ~ 200 ppm, bơm 1/2 lần
Thời gian lấy mẫu: 45 giây mỗi lần bơm
Chuyển đổi màu: xanh da trời sang vàng
Phương trình phản ứng: SO2 + BaCl2 +H2O → BaSO3 + 2HCl, HCl+Base → Chloride
Hệ số biến đổi: 10% ( 5~ 20 ppm), 5% (20 ~ 100 ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
1.25 to
2.5 ppm |
2.5 to
5 ppm |
5 to
100 ppm |
100 to
200 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
0.25 ppm (n=4) |
| Colour Change |
Blue → Yellow |
| Reaction Principle |
SO2 + BaCl2 +H2O → BaSO3 + 2HCl
HCl+Base → Chloride |
| Coefficient of Variation |
10% (for 5 to 20 ppm), 5% (for 20 to 100 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,
Nitric oxide |
|
No |
No |
| Carbon dioxide |
|
No |
No |
| Nitrogen dioxide |
≧ 1/1 |
+ |
Pale purple |
| Hydrogen sulphide |
|
No |
No |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
0.25 ppm (2014) |
- |
