Không cần dùng thêm bơm. cắm thẳng vào cốc dung dịch
Vạch chỉ thị: 0.5 ~ 20 ppm
Thang đo: 0.5 ~ 20 ppm
Thời gian lấy mẫu: 3 phút
Chuyển đổi màu: Trắng sang nâu
Phương trình phản ứng: S2- + Pb(CH3COO)2 → PbS
Số ống trong hộp: 10
Catalog
Performance
| Measuring Range |
0.5 to 20 ppm |
| Sampling Time |
3 minutes |
| Detecting Limit |
0.2 ppm |
| Colour Change |
White → Brown |
| Reaction Principle |
S2- + Pb(CH3COO)2 → PbS |
| 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 |
| SO32- |
≦ 20 ppm |
No |
No ( ≦ 1%) |
| Cl- |
≦ 100 ppm |
No |
No ( ≦ 5%) |
| Cr6+ |
≧ 0.2 ppm |
 |
Yellow ( ≧ 1ppm) |
| CO32- |
≦ 500 ppm |
No |
No ( ≦ 1%) |
| S2O32- |
≦ 20 ppm |
No |
No ( ≦ 1%) |
| I- |
≦ 200 ppm |
No |
Yellow ( ≧ 3000ppm) |
| SO42- |
≦ 100 ppm |
No |
No( ≦ 1%) |
| PO43- |
≦ 100 ppm |
No |
No ( ≦ 1%) |
Detector tubes for dissolved substances
(i.e. in solution).
Dissolved sulphide detector tube
211H / 211M / 211 / 211LL

|
 |
Liquid detector tube
| Ozone: |
218 |
| Chloride ion: |
221L / 221LL |
| Mercury: |
271 |
| Hexavalent chromium: |
273 |
| Bivalent iron: |
281 |
| Copper: |
284 |
| Zinc: |
285 |
| Nicke: |
291 |
|
To measure, simply immerse the detector tube in a sample of liquid (placed in a beaker or other container). Anyone can measure concentrations quickly, easily and accurately on site.
* Adjustment for pH is required when measuring with liquid detector tubes.