Gastec 1LM Quick-measuring Detector tubes Carbon monoxide CO (25 ~ 2000 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model1LM
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Indicator: 50 ~ 1000 ppm
Measuring Range:
+ 25 to 50 ppm, Number of Pump Strokes 2
+ 50 to 1000 ppm, Number of Pump Strokes 1
+ 1000 to 2000 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Pale brown / Pale green (dual layers)
Reaction Principle: 5CO + I2O5 + H2S2O7 → I2
Coefficient of Variation: 10% (for 50 to 200 ppm), 5% (for 200 to 1000 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 45 seconds per pump stroke | |||
| Detecting Limit | 5 ppm (n=2) | |||
| Colour Change | White → Pale brown / Pale green (dual layers) | |||
| Reaction Principle | 5CO + I2O5 + H2S2O7 → I2 | |||
| Coefficient of Variation | 10% (for 50 to 200 ppm), 5% (for 200 to 1000 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 |
| Acetylene, Olephines, Propane, Hexane | + | Pale brown | |
| Butane | + | Pale brown | |
| Hydrogen | No | No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | - | 12.5 to 74% |
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