Sampling soil gas into canisters provides significant advantages over the use of passive adsorbent samplers with regard to both maintaining the integrity of the sample in the field and ensuring that the best analytical technique is used in the laboratory.
Canisters eliminate the need for pumps, batteries, and media selection, and the same sampling approach can be utilized for any gas concentration while being universal for all compounds. Furthermore, humidity and temperature concerns inherent with tube sampling do not affect canister accuracy.
Entech has a long history of engineering turn-key solutions specific to the environments being sampled. Designed with feedback from numerous sampling professionals, the Chameleon provides an all-in-one solution that is changing the way soil gas studies are conducted world-wide.
Video: Advantages of Soil Gas Sampling with Canisters over Adsorbents
The Chameleon improves the accuracy of soil gas sampling by applying basic principles of gas chromatography:
• Ensure all surfaces are inert (Entech Silonite™ coated stainless steel).
• Minimize surface area and shorten path lengths to the canister.
• Minimize leak prone connections by engineering and machining custom solutions.
• Eliminate absorption (no plastic tubing where possible).
• Prove system is leak-tight before delivery to field.
• Isolate the flow path from the outside world during transportation.
The Chameleon can be configured to minimize compression fittings based on the probe, line, or fitting to which it connects.
The inlet and outlet can be configured separately to optimize the sample train.
The downhole vacuum gauge monitor can be added to any configuration, and verifies that excessive vacuum is not forming in the soil (<7.3” Hg vacuum).
All configurations can be maintained under vacuum during shipment to the field to perform the shut-in test (leak test) automatically.
Industry standard for time integrated sampling, from 1 hour to 1 month!!
Proven recovery of low level TO15 compounds to sub-PPBv levels (Ap Note 2014-05).
Ultra low background, allowing measurements down to 10^-6 risk factors reliably, even for compounds requiring detection down to 2 part per trillion.
Tool-free operation when using Micro QT Valve Option.
Easy start/stop automation if needed with TM1200 Timer.
Now even better with improved Silonite™ coating!!