Vạch chỉ thị: 5 ~ 80 ppm
Thang đo:
+ 5 ~ 80 ppm, bơm 1 lần
+ 80 ~ 232 ppm, bơm 1/2 lần
Thời gian lấy mẫu: 2 phút mỗi lần bơm
Chuyển đổi màu: Pale yellow → Pale blue
Phương trình phản ứng: C4H8O + Cr6+ + H3PO4 → Cr3+
Hệ số biến đổi: 10% (5 ~ 10 ppm), 5% (10 ~ 80 ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 5 to 80 ppm |
80 to 232 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
1.4 ppm (n=1) |
| Colour Change |
Pale yellow → Pale blue |
| Reaction Principle |
C4H8O + Cr6+ + H3PO4 → Cr3+ |
| Coefficient of Variation |
10% (for 5 to 10 ppm), 5% (for 10 to 80 ppm) |
| Shelf Life |
1 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 50 ppm (2014) |
100 ppm (2014) |
2 to 11.8% |
30ppm
200ppm
