Vạch chỉ thị: 2 ~ 20ppm
Thang đo:
+0.5 ~ 1ppm , bơm 4 lần
+ 1 ~ 20ppm , bơm 2 lần
+ 20 ~ 46ppm , bơm 1 lần
+ 46 ~ 108ppm, bơm 1/2 lần
Thời gian lấy mẫu: 1. 5 phút mỗi lần bơm
Chuyển đổi màu: Trắng sang xám
Phương trình phản ứng: CH3I + I2O5 + V2O5 + H2SO4 → I2
Hệ số biến đổi: 5% (1 ~ 20ppm)
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
0.5 to 1ppm |
1 to 20ppm |
20 to 46ppm |
46 to 108ppm |
| Number of Pump Strokes |
4 |
2 |
1 |
1/2 |
| Correction Factor |
0.5 |
1 |
2.3 |
5.4 |
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.2ppm (n=4) |
| Colour Change |
White → Gray |
| Reaction Principle |
CH3I + I2O5 + V2O5 + H2SO4 → I2 I2 + 3,3,5,5-Tetramethylbenzidine 「ェ Reaction Products |
| Coefficient of Variation |
5% (for 1 to 20ppm) |
| Shelf Life |
2 Year |
| 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 |
| Chlorine |
1/1 |
+ (Two layers) |
Brown (turns pale blue after a few minutes) |
| Nitrogen dioxide |
1/1 |
(Two layers) |
Pink |
| Methyl bromide |
30 ppm |
No |
No |
| Dichloromethane |
50 ppm |
No |
No |
| Carbon dioxide |
1% |
No |
No |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 2 ppm (2014) |
- |
- |