MiniProbe SimulProbe

Simultaneous soil core and soil gas sampling

BESST’s Mini SimulProbe is used in exploratory borehole drilling to collect a simultaneous soil core and soil gas samples. The probe is driven into the ground by a hammer, causing the soil to enter the core-barrel inside the probe. Next, the probe is lifted two inches, opening a hidden compartment that channels the soil gas into the probe through two Teflon straws located in the split half grooves that run along the edges of the core barrel. A vacuum pump is connected to a tube running from the probe to the surface. The vacuum pump is used to collect the gas directly from the soil. Once the gas sample has been collected using a Tedlar bag, Summa Canister or Soil Gas Syringe, the probe can be removed from the borehole and the soil core sample can be easily removed from the SimulProbe for shipment to a laboratory.


  • Representative sampling: Soil core and soil gas samples are simultaneously at the same spot.
  • Volatile Organic Compounds (VOC) measurement: The VOC’s are directly collected from the ground which limits cross-contamination of the sample.
  • Time savings: Quick setup and mobilization. System can be used with a photoionization detector (PID) for on-site results.
  • In-Situ Headspace Test: Enhances accuracy of on-site field measurements by directly sampling the soil-gas downhole, rather than using unreliable ex-situ methods, which damage sample integrity.


  • Length: 2 feet
  • Maximum outside diameter: 2 inches
  • Core Length 17.4 inches
  • Core Diameter 1.18 inches
  • Top Connection: AW (custom options available upon request)
  • Rig Compatibility: Hollow Stem Auger, Air Rotary Casing Hammer, Dual Wall Percussion, Sonic

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50 Tiburon St, Suite 7
San Rafael, CA 94901

Office: (415) 453-2501
Leslie Emmens
Main Office
(415) 453-2501 ext. 101
Noah Heller, MS, PG
(415) 302-7354
Miles Koehler
Inside Sales and Technical Info
(510) 414-9984
James Tsumura
Outside Sales
(626) 512-3715

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