Gastec Detection Tube No. 6LLP measures Water Vapor with a Range of 2 to 10 LB/MMCF.
Performance:
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 |
