Dual Sensor Gas Analyzer

The Geospect Dual Sensor Gas Analyzer is a HUGE advancement in mudlogging / surface logging technology.


The Geospect Dual Sensor Gas Analyzer uses our patent pending technology to detect heavies in the gas stream at speeds unmatched by any gas chromatograph.

Screenshot of the Dual Sensor Gas Analyzer

Chromatographs are great at analyzing gas but they  leave gaps in data because they are simply too slow to keep up with today’s fast drilling.

The Dual Sensor Gas Analyzer  can be used alone or if more detail is needed, can be used in conjunction with a chromatograph to fill in the gaps.


  • Pick gas / oil contact points at exact depths with great accuracy.
  • Make critical geosteering decisions quickly, without waiting on a chromatographic analysis.
  • Simple calibration procedure
  • Repeatable results
  • Both sensors used are proven oilfield workhorses
  • Easy Setup
  • Simple to use
  • Can be retrofitted into an existing Geospect system.
  • Can detect non-hydrocarbon combustible gases (Hydrogen, Acetylene)
  • Inexpensive to purchase and maintain

How It Works
It has long been known that infrared total gas sensors are extremely sensitive to heavy hydrocarbons whereas a combustible sensor (hotwire or CC sensor) is not. In fact, an IR sensor is more than six times more sensitive to propane than it is to methane.

We place both sensors in the gas stream. Both sensors are calibrated using a known quantity of methane (CH4). As long as methane is the only gas in the gas stream both sensors read gas relatively linearly. When heavier hydrocarbons are present, the IR sensor will read noticeably more gas than the hotwire sensor. We created a ratio that essentially uses the Hotwire sensor as a reference sensor, and the IR sensor as a “heavy detector.” The ratio goes up based on the type and quantity of heavies present in the gas stream.

Please feel free to call or email us for additional information.


Click here for a video demonstration.


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