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The multi-foil gas sampling bag generally made up of the four protective layers where the outer layer is of Nylon, while the inner layer is made up of polyethylene. It makes the sandwich of aluminum foil of thickness 0.000762cm. Hence it is also known as Aluminium multi-foil gas sampling bag.
It is stable fo the low molecular weight compounds like methane, carbon dioxide, carbon mono oxide, and permanent gases, but it not recommended for the low ppm VOCs. These bags are chemically inert and protection to light and moisture. The maximum operating temperature in these is 90-degree centigrade. The sample stability period is 78 hours.
The Aluminium multi-foil gas sampling bags are available in a range of capacity from 500ml to 100 liters. The combo valve is made-up of polypropylene (PP) material, with a hose connection for sample inlet and silicon septum at the top. The diameter of the hose connection is 7mm. We also supply a bag with a dual valve. The valve can be formed in other materials too such as Teflon or stainless steel (SS), which is on-demand as per client requirement.

| Aluminum Multi-Foil Gas Sampling Bag - Technical Specifications | |
|---|---|
| Product Name | Aluminum Multi-Foil Gas Sampling Bag |
| Material of Construction (Bag) | Aluminum Foil + Polyethylene (PE) + Nylon (Multi-layer structure) |
| Number of Layers | 4 Layers (Nylon outer layer, Aluminum foil layers, PE inner layer) |
| Aluminum Foil Thickness | ~0.000762 cm |
| Material of Construction (Valve) | Polypropylene (PP) (Optional: SS / PTFE on request) |
| Valve Type | Combo Valve with Septum (Top mounted) |
| Hose Connection Diameter | 7 mm |
| Available Capacities | 0.5 L, 1 L, 2 L, 3 L, 5 L, 10 L |
| Extended Capacity Range | Up to 100 Liters |
| Color / Appearance | Opaque (Silver) |
| Operating Temperature | Up to 90°C |
| Sample Stability | Up to ~78 hours |
| Gas Compatibility | Suitable for methane, CO₂, CO, and permanent gases |
| VOC Compatibility | Not recommended for low ppm VOCs |
| Barrier Properties | Excellent resistance to light, moisture, and gas permeation |
| Chemical Properties | Chemically inert, low contamination |
| Form Factor | Flexible, lightweight, portable bag |
| Applications | Environmental monitoring, industrial emissions testing, gas chromatography, petroleum industry, research laboratories, air quality analysis |
It generally used in the petroleum industries, environmental organizations, scientific and educational institutions. Because of the portable nature of the bags, it is very convenient to carry for gas sampling. It is better to avoid sample collection of unstable or highly reactive compounds.
We, the Shilpa Enterprises, manufacture a high-grade gas sampling bags with all possible customization. We also supply products in bulk with cost-effective options. Our Aluminium multi-foil gas sampling bags are portable, ready to use with high accuracy and precision.
| Specification | Aluminum Multi-Foil Bag | Tedlar (PVF) Bag | Kynar (PVDF) Bag |
|---|---|---|---|
| Material Composition | Multi-layer (Aluminum + PE + Nylon) | Polyvinyl Fluoride (PVF) | Polyvinylidene Fluoride (PVDF) |
| Appearance | Opaque (Silver) | Transparent / Slightly Hazy | Transparent |
| Gas Permeability | Very Low (Excellent barrier) | Low | Low |
| Chemical Resistance | High (but limited for VOCs) | Very Good | Excellent (best for reactive gases) |
| VOC Compatibility | Not suitable for low ppm VOCs | Good | Excellent |
| Moisture Resistance | Excellent | Moderate | Excellent |
| UV Resistance | Excellent | Good | Excellent |
| Sample Storage Time | 72–78 hours | 24–48 hours | 48–72 hours |
| Temperature Resistance | Up to ~90°C | Up to ~60°C | Up to ~73°C |
| Durability | High (less flexible) | Moderate | High |
| Flexibility | Moderate | High | High |
| Best Use Cases | Permanent gases, gas chromatography, long-term storage, light-sensitive samples | General air sampling, environmental monitoring, routine gas analysis | Reactive gases, VOC sampling, harsh chemical environments |
| Cost | High | Low to Medium | Medium |