Gas Sample Bag Selection Guide

Gas Sample Bags are one of the types of sampling media used in air sampling, onto/into which the contaminant is collected. Other sampling media includes the sorbent in sorbent tubes and filters. Use this convenient guide to help you select a gas sample bag to meet your application.

Gas Sample Bag Material	Thickness mil (mm)	Fittings	Benefits	Disadvantages
Tedlar	2 (0.05)	Dual SS Single PP Breath-gas Analysis	Classic Dupont film Good stability for VOCs, CO, CO₂, methane, SF₆ and some sulphur compounds including H₂S
Standard FlexFoil	5 (0.13)	Single SS Single PP	Effectively retains H₂S for 48 hours Good light and moisture barrier properties Good stabilty for CO, CO₂, methane, hydrogen, H₂S, carbonyl sulphide, methyl and ethyl mercaptan and SF₆
FlexFoil PLUS	5 (0.13)	Single SS Single PP Breath-gas Analysis	All the benefits of Standard FlexFoil Low VOC background Good stabilty for VOCs Suitable for collecting low ppm to high ppb level VOCs
SamplePro FlexFilm	3 (0.07)	Dual SS Single PP	Low VOC background Good stability for many VOCs, CO, CO₂, methane and SF₆ Acceptable stability for some sulphur compounds Most economical option	Not recommended for H₂S or carbonyl sulphide Requires flat storage and transport for sample integrity

Table Notes:

SS - Stainless Steel
PP - Polypropylene

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