Performance |
Measuring Range | 0.2 to 200 ppm |
Sampling Hours | 1 to 48 hours |
Detecting Limit | 0.2 ppm (10hours) |
Color Change | White→ Brown |
Reaction Principle | H2S + Pb(CH3COO)2 → PbS +2CH3COOH |
Coefficient ofVariation | 10%(for 10 to 200 ppm-hr) |
ShelfLife | 3 Year |
Correctionsfor temperature & humidity | Unnecessary |
Store the tubes atcool and dark place. |
Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Nitrogendioxide | 5 ppm | - | No |
Ammonia | 25 ppm | No | No |
Chlorine | 1 ppm |
No | No |
sulphur dioxide | 5 ppm | No | No |
Calibration gasgeneration | Diffusion tubemethod |
TLV-TWA | TLV-S | Explosive range |
10 ppm | 15 ppm | 4.0to 44% |