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SKU: GAS174D Categories: ,

GAS174D Butadiene-1,3 Passive Dosi-Tube 1.3 – 200ppm

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SKU: GAS174D Categories: ,


GAS174D Butadiene-1,3 Gastec Passive Sampling Dosi Tubes (Time Weighted Average Detector Tubes)

The Dosi-Tube System allows an operator to evaluate the level of gas a worker is exposed to over a time period such as a working shift.

The Dosi-Tube is easily clipped into the Dosi-tube holder (GAS710) which is worn on a garment of clothing.

Measuring Range 1.3 to 200 ppm
Sampling Hours 1 to 8 hours
Detecting Limit 1.3 ppm (8 hours)
Colour Change Reddish purple           Pale brown
Reaction Principle Butadiene reacts with Permanganate to produce light brown reaction product.

CH2:CHCH:CH2 + MnO4 (Reddish purple)          Pale brown product

Coefficient of Variation 10% (for 10 to 200 ppm∙hr)
Shelf Life Up to 2 years from point of manufacture
Corrections for
temperature & humidity
Temperature correction is necessary
Store the tubes at cool and dark place.


Possible coexisting substances and their interferences
Substance Concentration Interference Change colour by itself
Unsaturated hydrocarbons Plus error Produce pale brown discoloration

Other substances measurable with this detector tube

Substance  Correction  Measuring range 
Ethylene Factor: 1.2 1.56 to 240 ppm
Vinyl Chloride Factor: 1.2 1.56 to 240 ppm
Isoprene Factor: 2.0 2.6 to 400 ppm
Trans-1,2-Dichloroethylene Factor: 3.0 3.9 to 600 ppm

Additional Information

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