Gastec 2LL 二氧化碳检测管CO2（300-5000 ppm）
制造商: Gastec Model: 2LL - 联系
Indicator: 300-5000 ppm
Measuring Range: 300-5000 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minutes per pump stroke
Colour Change: Pale blue → Purple
Reaction Principle: CO2 + N2H4 → NH2NHCOOH
Coefficient of Variation: 10% (300 ~ 1000 ppm), 5% (1000 ~ 5000 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Details
Performance
| Measuring Range | 300 to 5000 ppm |
| Number of Pump Strokes | 300 to 5000 ppm (n=1) |
| Correction Factor | 1 |
| Sampling Time | 1.5 minutes per pump stroke |
| Detecting Limit | 30 ppm (n=1) |
| Colour Change | Pale blue → Purple |
| Reaction Principle | CO2 + N2H4 → NH2NHCOOH |
| Coefficient of Variation | 10% (for 300 to 1000 ppm), 5% (for 1000 to 5000 ppm) |
| 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 |
| Ammonia | No | No | |
| Carbon Monoxide | No | No | |
| Chlorine | No | No | |
| Hydrogen chloride | No | No | |
| Nitrogen oxides | No | No | |
| sulphur dioxide | No | No | |
| Amines | No | No | |
| Organic solvents | No | No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 5000 ppm(2014) | 30000 ppm(2014) | - |
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