Draeger Tube, Tetrahydrothiophene

$95.00
Availability: Call for Availability
Product Code: 8101341
Brand: DRAEGER SAFETY INC.
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Draeger Tube - Tetrahydrothiophene 1/b
Order No. 81 01 341

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 minutes
  in natural gas: approx. 10 minutes
Standard Deviation: ± 15 to 20%
Color Change: violet to yellow brown
   
Ambient Operating Conditions
Temperature: 0 to 35° C ~ 32 to 95° F
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.
 
Extension of the Measuring Range
1.6 to 16 ppm / 6.4 to 64 mg/m3
n = 20 multiply the reading by 1.6