Draeger 8101341 Tetrahydrothiophene 1/b Detector Tubes (5 tests per box)

Application Range:

• Standard Measuring Range: 1 to 10 ppm / 4 to 40 mg/m3
• Number of Strokes n: 30
• Time for Measurement: in air: approx. 15 min in natural gas: approx. 10 min
• Standard Deviation: ± 15 to 20 %
• Color Change: violet → yellow brown

Ambient Operating Conditions:

• Temperature: 0 to 35 °C
• Absolute Humidity: < 30 mg H2O / L

Reaction Principle:

• THT + KMnO4 → yellow brown reaction product

Cross Sensitivity:

• 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.

Additional Information:

• 1.6 to 16 ppm / 6.4 to 64 mg/m3
• n = 20 multiply the reading by 1.6