Vạch chỉ thị: 50 ~ 800 ppm
Thang đo:
+ 25 ~ 800 ppm, bơm 1 lần
+ 800 ~ 1680 ppm, bơm 1/2 lần
Thời gian lấy mẫu: 3 phút mỗi lần bơm
Chuyển đổi màu: Pale yellow → Blue
Phương trình phản ứng: CH2:CH2 + (NH4)2MoO4 + PdSO4→ Molybdenum blue
Hệ số biến đổi: 10% (25 ~ 200 ppm), 5% (200 ~ 800 ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| (25) to 800 ppm |
800 to 1680 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
|
| Detecting Limit |
5 ppm (n=1) |
| Colour Change |
Pale yellow → Blue |
| Reaction Principle |
CH2:CH2 + (NH4)2MoO4 + PdSO4→ Molybdenum blue |
| Coefficient of Variation |
10% (for 25 to 200 ppm), 5% (for 200 to 800 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 |
| Ammonia, Hydrogen cyanide |
|
+ |
White |
| Carbon monoxide, Hydrogen |
|
+ |
Blue (whole layer) |
| Hydrogen chloride |
|
+ |
Pink |
| Hydrogen sulphide |
|
+ |
Black |
| Butadiene |
|
+ |
White |
| Butane, Pentane |
|
+ |
Blue (whole layer) |
| Butylene, Propylene |
1/4 |
+ |
Blue |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Acetylene |
1.3 |
1 |
32.5 to 1040 ppm |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 200ppm(2014) |
- |
2.7 to 36% |
