Methyl Bromide Detection Tubes 0.5/a (0.5 - 30 ppm)
For short-term measurements more than 160 Drager Tubes are available to measure the so called spot concentrations of specific gases.
A wide range of different gases and vapors can be detected and measured, such as:
- Determining and measuring concentration peaks
- Measuring personal exposure in the inhalation area
- Detecting leaks in pipelines, gas installations etc.
- Air analysis in sewers, shafts and confined spaces
| Standard Measuring Range: |
5 to 30 / 0.5 to 5 ppm |
| Number of Strokes (n): |
2 / 8 |
| Time for Measurement: |
approx. 2 min / approx. 5 min. |
| Standard Deviation: |
± 15 to 20 % |
| Color Change: |
white -> blue green |
| Temperature: |
2 to 40 ° C |
| Absolute Humidity: |
max. 20 mg H2O / L |
| Reaction Principle: |
a) CH3Br + H2S2O7 -> HBr
b) HBr + CrVI -> Br2
c) Br2 + o-tolidine -> blue green reaction product |
| Cross Sensitivity: |
Vinyl chloride: 2 ppm no reading.
Carbon tetrachloride: 2 ppm no reading
Perchloroethylene and Trichloroethylene: 5 ppm changes the indicating layer to a light yellow.
1.2-dichloroethylene: 20 ppm result in a reading of approx. 3 ppm.
1.1-dichloroethylene: up to 2 ppm the sensitivity is the same as with methyl bromide. |