Passive Thermal Desorption Tubes

The SKC Passive Thermal Desorption tubes offer an easy and accurate way ot sample low-level VOCs over extended periods of time. They meet the requirements of EPA 325A regulation for fence-line monitoring of benzene at petroleum refineries with extended sample periods of 14 days. SKC supplies sampling rates for other VOCs for other applications. A weatherproof shelter is available for protecting samplers during outdoor sampling.

Diffusive Thermal Desorption Tubes

  • Meets specification of U.S. EPA 325A and UK HSE MDHS 104
  • EPA-validated sampling rates available for benzene, toluene, ethylbenzene, xylenes and many other VOCs
  • Allows for extended sample times for low-level measurements
  • Unique identification number and bar code
  • Airflow direction and cap placement arrow indicators printed on tube
  • Reusable after laboratory purging

The tubes are standard-sized SilcoNert 2000® deactivated Stainless Steel Thermal Desorption tubes with Swagelock fittings; when they are deployed a diffusion cap is connected to one end. The diffusion cap works the same way as a front plate on a passive badge, and has a small screen inside which also keeps out particulates/insects. Tubes are deployed inside a custom-made shelter for outdoor use, which can hold up to 4 tubes at a time, and keeps them pointing diffusion-cap downwards.

Note: All tubes are conditioned and quality control tested to assure low background

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