Vạch chỉ thị: 100 ~ 1800 ppm
Thang đo:
+ 20 ~ 100 ppm, bơm 4 lần
+ 100 ~ 1800 ppm, bơm 1 lần
+ 1800 ~ 3600 ppm, bơm 1/2 lần
Thời gian lấy mẫu: 45 phút mỗi lần bơm
Chuyển đổi màu: tím sang vàng
Phương trình phản ứng: SO2 + BaCl2 +H2O → BaSO3 + 2HC, HCl+Base → Chloride
Hệ số biến đổi:
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 20 to 100 ppm |
100 to 1800 ppm |
1800 to 3600 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
4 ppm (n=4) |
| Colour Change |
Purple → Yellow |
| Reaction Principle |
SO2 + BaCl2 +H2O → BaSO3 + 2HCl
HCl+Base → Chloride |
| Coefficient of Variation |
10% (for 100 to 600 ppm), 5% (for 600 to 1800 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 |
Carbon monoxide,
Nitric oxide |
|
No |
No |
| Carbon dioxide |
|
No |
No |
| Nitrogen dioxide |
≧ 1/10 |
+ |
White ( ≧ 600ppm) |
| Hydrogen sulphide |
≧ 10 times |
 |
No |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
0.25 ppm (2014) |
- |
