Multi-Layer Foil Gas Sampling Bags, 25 L, 18″x24″ w/Polypropylene Combo Valve & Septum, 1 Eyelet, 5-pk.

Sampling bags are low-cost, whole-air sampling devices for VOCs and permanent gases. Several EPA, NIOSH, and OSHA methods exist for bag sampling for a variety of applications: stationary sources emissions; workplace atmospheres; ambient, indoor air quality; and breath analysis. All our multi-layer foil bags feature a polypropylene combo valve with hose connection to fit 3/16″ ID tubing and syringe port with replaceable septum. A single eyelet provides handling convenience.

Physical Specifications
Composition: 4-layer— 60 gauge nylon (outer layer); Polyethylene; 0.0003″ aluminum foil; 0.002″ polyethylene (inner layer)
Thickness: 0.004″
Tensile Strength: 19 lb/in
Max. Operating Temp.: 82 °C (180 °F)
Specific Gravity: 1.09 g/mL
Oxygen Permeability: 0.0078 cc / m² / day @ 0% RH, 23 °C
Water Vapor Permeability: 0.0078 g / m² / day @ 90% RH, 40 °C
Carbon Dioxide Permeability: 0.0078 cc / m² / day

Features & Benefits

• Good stability for low molecular weight compounds, such as methane, CO, CO₂, and permanent gases.
• Chemically inert with light and moisture protection.
• Not recommended for low ppm VOCs due to background levels.
• Protective 4-layer barrier minimizes gas permeability:
  • 60 gauge nylon (outer layer)
  • Polyethylene
  • 0.0003″ aluminum foil
  • 0.002″ polyethylene (inner layer)
• Maximum operating temperature: 82 °C (180 °F).