Performance |
Measuring Range | 0.1 to 10 ppm |
Sampling Hours | 1 to10 hours |
Detecting Limit | 0.02 ppm (10hours) |
Color Change | Pink → Yellow |
Reaction Principle | 2NH3 + H2SO4 → (NH4)2SO4 |
Coefficient ofVariation | 10%(for 1 to 10 ppm-hr) |
ShelfLife | 2 Year |
Correctionsfor temperature & humidity | Temperature correction isnecessary |
Store the tubes atcool and dark place. |
Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Interference | Change colour byitself to |
Amines | + | Yellow |
Hydrazine | + |
Yellow |
Othersubstance measurable with this detectortube |
Substance | CorrectionFactor | SamplingTime | MeasuringRange |
Methyl amine | 1.9 | 1 to10 hours | 0.19to 19 ppm |
Trimethylamine | 2.3 | 1 to 10 hours | 0.23to 23 ppm |
Calibration gasgeneration | Diffusion tubemethod |
TLV-TWA | TLV-S | Explosive range |
25 ppm | 35ppm | 15 to28% |