| Performance |
MeasuringRange | 0.13 to 0.25% | 0.25 to3% | 3 to 6% |
Numberof PumpStrokes | 2 | 1 | 1/2 |
CorrectionFactor | 1/2 | 1 | 2 |
SamplingTime | 2 minutes per pumpstroke | ||
DetectingLimit | 0.025% (n=2) | ||
ColorChange | White → Purple | ||
ReactionPrinciple | CO2 + N2H4 → NH2 | ||
| Coefficient ofVariation | 10% (for 0.25 to 1%), 5% (for 1 to 3 %) | ||
| ShelfLife | 3Years | ||
| Correctionsfor temperature & humidity | Unnecessary | ||
| Store the tubes at cool and darkplace. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Ammonia | - | No effect | Nodiscoloration |
CarbonMonoxide | - | No effect | Nodiscoloration |
Hydrogenchloride, | - | No effect | Nodiscoloration |
Nitrogenoxides | - | No effect | Nodiscoloration |
Sulfurdioxide | - | No effect | Nodiscoloration |
Amines | - | No effect | Nodiscoloration |
Organicsolvents | - | No effect | Nodiscoloration |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 5000ppm | 30000ppm | - |
NH
