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Indicator: 1 ~ 50 mg/L
Measuring Range: 0.5 ~ 50 mg/L
Sampling Time: 2 minute
Colour Change: White → Yellow
Reaction Principle: Cr6+ + Pb(CH3COO)2 → PbCrO4
Nr. of tests: 10
| Measuring Range | 0.5 to 50 mg/L |
| Sampling Time | 2 minutes |
| Detecting Limit | 0.4 mg/L |
| Colour Change | White → Yellow |
| Reaction Principle | Cr6+ + Pb(CH3COO)2 → PbCrO4 |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Water temperature correction is necessary |
| Store the tubes at cool and dark place. | |
| Substance | Concentration | Interference | Change colour by itself to |
| Cl- | ≧ 20 mg/L | + | No |
| CH3COO- | ≧ 20 mg/L | + | No |
| NO3- | ≧ 30 mg/L | + | No |
| S2- | ≧ 0.5 mg/L | Unclear | Brown ( ≧ 0.5 mg/L ) |
| SO42- | ≧ 10 mg/L | + | No |
| PO43- | ≧ 5 mg/L | + | No |
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Dissolved sulphide detector tube
211H / 211M / 211 / 211LL
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Liquid detector tube
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