Vạch chỉ thị: 50 to 800 ppm
Thang đo:
+ 20 to 50 ppm, bơm 2 lần
+ 50 to 800 ppm, bơm 1 lần
Thời gian lấy mẫu: 3 phút mỗi lần bơm
Chuyển đổi màu: hồng sang xanh da trời nhạt
Phương trình phản ứng: C4H8O + Cr6+ + H2SO4 → Cr3+
Hệ số biến đổi: 15% (50 ~ 200 ppm), 10% (200 ~ 800 ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 20 to 50 ppm |
50 to 800 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
2 ppm (n=2) |
| Colour Change |
Pink → Pale Blue |
| Reaction Principle |
C4H8O + Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation |
15% (for 50 to 200 ppm), 10% (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 |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| 1.4-Dioxane |
by scale |
2 |
25 to 140 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 50 ppm |
100 ppm |
2 to 11.8% |
