Vạch chỉ thị: 5 ~ 100 ppm
Thang đo: 5 ~ 100 ppm, bơm 3 lần
Thời gian lấy mẫu: 2 phút mỗi lần bơm
Chuyển đổi màu: Trắng → nâu nhạt / xanh lá cây nhạt
Phương trình phản ứng: 5CO + I2O5 + H2S2O7 → I2
Hệ số biến đổi: 5% (5 ~ 100 ppm)
Số ống trong hộp: 5
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
5 to 100 ppm |
| Number of Pump Strokes |
3 |
| Correction Factor |
1 |
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
2 ppm (n=3) |
| Colour Change |
White → Pale brown / Pale green (may produce dual layers) |
| Reaction Principle |
5CO + I2O5 + H2S2O7 → I2 |
| Coefficient of Variation |
5% (for 5 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 |
| Hydrogen |
10% |
15% |
No discoloration |
| Paraffinic hydrocarbons C6 or less (RH0%) |
15% |
No |
Pale brown when higher than 15% |
| Ethylene(RH0%) |
2% |
No |
Pale brown when higher than 3% |
| Propylene(RH0%) |
15% |
No |
Pale brown when higher than 15% |
| Acetylene(RH0%) |
200ppm |
No |
Pale brown when higher than 250ppm |
| Carbon dioxide,Nitrogen oxides |
|
No |
No discoloration |
| Hydrogen sulphide |
|
No |
No discoloration |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
- |
12.5 to 74% |