Water Vapor Detection Tubes (2 to 10 lb/MMCF)
Gastec Detection Tube No. 6LLP measures Water Vapor with a Range of 2 to 10 LB/MMCF.
Performance:
- Measuring Range: 2 to 10 LB/MMCF
- Number of Pump Strokes: 2 (200 ml)
- Correction Factor: 1
- Sampling Time: 3 minutes
- Detecting Limit: 2 LB/MMCF (2 pump strokes)
- Color Change: Yellow to Green
- Corrections for Temperature & Humidity: Temperature correction is necessary
- Relative Standard Deviation: 10% (for 2 to 4 LB/MMCF), 5% (for 4 to 10 LB/MMCF)
- Shelf Life: 3 Years
- Reaction Principle: H2O + Mg(ClO4)2 → Mg(ClO4)2･H2O
Possible coexisting substances and their interferences:
| Substance | Concentration | Interference | Changes color by itself to |
| Sulfur dioxide | ≦ 15 ppm | No | No |
| Nitrogen dioxide, Hydrogen sulfide | ≦ 30 ppm | No | No |
| Hydrogen cyanide | ≦ 40 ppm | No | No |
| Methyl ethyl ketone | ≦ 70 ppm | No | No |
| Ethyl acetate | ≦ 100 ppm | No | No |
| Acrylonitrile | ≦ 40 ppm | No | No |
| Acetaldehyde | ≦ 50 ppm | No | No |
| Methanol | ≧ 50 ppm | + | Green |
| Triethylene glycol | No | No |
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