Air & Gas Sampling

Shop air and gas samplers with ultra-inert surface technology. EPA-compliant.

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GMICore delivers comprehensive air and gas sampling solutions engineered to preserve sample integrity from field collection through laboratory analysis. Our product range includes air sampling canisters (SilcoCan and TO-Can canisters) and air sampling bags; precision soil gas samplers for vapor intrusion studies; integrated passive sampling kits for EPA Method TO-15 compliance; and high-pressure sample cylinders for petrochemical environments.

Everything in our sampling lineup is built to ensure quantitative accuracy for volatile and semivolatile analytes under demanding field conditions, with contamination-resistant materials and configurations that maintain sample integrity throughout the collection process.

Inert Stainless-Steel Surface Technology for Sample Integrity

Active compound loss is one of the most significant challenges in trace-level gas sampling, but it can be prevented with the right surface treatment. Siltek and Sulfinert surface treatments form an ultra-inert passivation layer that prevents adsorption of reactive analytes, including polar compounds, hydrogen sulfide, and mercury compounds.

Durable stainless-steel construction with a unibody design eliminates leak points in the sample path, further protecting sample integrity and helping prevent atmospheric contamination from compromising data quality or method compliance.

Together, these materials and design choices provide superior resistance to contamination and protect the sample throughout the entire collection and transportation process, even in harsh environmental conditions.

Precision-Engineered Sampling Features for Field-Ready Performance

Everything in our sampling lineup ships ready to deploy with user-focused engineering that streamlines field operations. Female RAVEqc quick-connect fittings enable rapid, secure connections while dual-gauge configurations provide instant pressure verification at collection sites.

Veriflo flow controllers feature interchangeable critical orifices that maintain precise flow rates from 0.5–2 mL/min up to 80–340 mL/min for air collection without sudden flow increases during sampling. Laser-etched serial numbers ensure complete QA/QC traceability.

Our integrated passive air sampling kits incorporate all the hardware necessary to collect air samples (canister sold separately) and are easy to assemble for field sampling. These kits provide accurate integrated sampling without a pump and are available in multiple sampling flow ranges and in stainless-steel or Siltek-treated finish.

Frequently Asked Questions About Gas Sampling Technology

What is the difference between active and passive gas sampling methods?

In active gas sampling, a known volume of air is drawn into or through a collection device at a controlled flow rate, providing precise time-weighted average measurements over short sampling periods. Passive gas sampling relies on molecular diffusion without requiring power or pumps, making it ideal for integrated sampling durations from 2 hours to 30 days across various air environments — though uptake rates depend on environmental conditions and diffusive geometry. Both methods use optimized sample path designs to help minimize contamination.

Why are Siltek and Sulfinert stainless-steel surface treatments necessary for certain applications?

Standard stainless-steel surfaces can adsorb highly active compounds, causing irreversible sample loss at trace concentration levels in gas samplers. Siltek treatment helps prevent adsorption of polar and reactive compounds, while Sulfinert treatment is specifically engineered to stabilize sulfur compounds — such as hydrogen sulfide and mercaptans — along with mercury compounds. These treatments help ensure quantitative recovery in petrochemical and industrial hygiene analyses where untreated stainless steel may cause analyte degradation, creating an inert sample path that protects against degradation and ensures accurate air quality measurements.

Is your gas sampling equipment compatible with EPA Method TO-15 canisters?

Yes — our integrated passive air sampling kits feature standardized, high-quality fittings that ensure leak-free connections to all TO-Can and SilcoCan air sampling canisters. Our air sampling canisters are exceptionally clean and ideal for EPA Method TO-15 air sampling.

What certifications do your high-pressure sample cylinders carry for gas sampling?

We offer sample cylinders meeting U.S. Department of Transportation DOT-3E standards for volumes up to 500 cc rated to 1800 psig, and DOT-3A for larger volumes, with every unit hydrostatically tested to 5/3 times working pressure. TPED-compliant cylinders rated to 1450 psig are available to meet European Union safety regulations. These containers are constructed from certified stainless steel and undergo rigorous pressure testing for safe transportation in any environment.

How do I select the correct flow controller or critical orifice for my gas sampler application?

Flow controller selection depends on your target sample volume, sampling duration, and canister capacity. Veriflo SC423XL flow controllers are available with a wide range of orifice sizes (0.0012–0.0090 inches), supporting flow rates from 2 to 340 mL/min.

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