Tetrahydrothiophene Detection Tubes 1/b (1 - 10 ppm)
For short-term measurements more than 160 Draeger 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:
||1 to 10 ppm / 4 to 40 mg/m3
|Number of strokes n:
|Time for Measurement:
||in air: approx. 15 min
in natrual gas: approx. 10 min
||± 15 to 20 %
||violet ──> yellow brown
||0 to 35 °C
||< 30 mg H2O / L
||THT + KMnO4 ──> yellow brown reaction product
||Up to 10 ppm hydrogen sulfide is adsorbed in the pretube, causing a brown discoloration. It is impossible to measure tetrahydrothiophene in the presence of mercaptans. Up to 100 ppm of olefines (e. g. ethene, propene) will cause the color of the indicating layer to become lighter, at higher concentrations the olefins are also indicated. Up to 200 ppm methanol does not interfere.
|Extension of Measuring Range:
||1.6 to 16 ppm / 6.4 to 64 mg/m3
n = 20 multiply the reading by 1.6