The PetroAlert Model 8900 combines the selectivity of gas chromatography with the sensitivity, broad dynamic range, and hydrocarbon selectivity of a flame ionization detector (FID) providing fast analysis of C1-C5 hydrocarbons required in Mud Logging for Oil & Gas exploration.

The PetroAlert Model 8900 uses a dual column configuration with timed backflush to vent which is used to strip off moisture and C6+ hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed sample volume is carried to the pre-cut column. Backflush of the pre-cut column is timed from sample injection so that only C1-C5 hydrocarbons are eluted from the pre-cut column to the analytical column. C6+ hydrocarbons on the pre-cut column are then vented. C1-C5 hydrocarbons are separated on the analytical column and elute to the flame ionization detector (FID) for analysis.
Unit of Measure


N/A Measurement of light hydrocarbons for oil & gas exploration.



  • Analysis of C1-C5 Hydrocarbons including Propylene for Gas Referencing
  • Automatic baseline adjustment for long-term stability
  • Automatic FID ignition
  • Automatic calibration to a known standard
  • Automatic Hydrogen & Combustion Air shutoff for maximum safety
  • Electronic support gas regulation
  • Analog output ranges are user selectable
  • Options for multipoint sampling
  • RS-232 and optional LAN

  • Specifications

    Analysis Time

    N/A <60 seconds


    N/A Flame ionization detector (FID)


    N/A Packed

    Oven Temperature

    N/A 60ºC, Nominal

    Lower Detection Limit

    N/A 10ppm as Methane


    N/A ± 5% (relative) within dynamic range


    N/A 2% of Measured Value


    N/A Hydrogen, 32 cc/min typical


    N/A Hydrogen, 8 cc/min typical

    Combustion Air

    N/A Air, 200 cc/min typical


    Digital: RS-232, optional Local Area Network
    Analog: (1) 0-20ma or 4-20ma loop power supplied, isolated. Selectable for: gas concentration, unintegrated detector signal. Options for up to 20 additional programmable 0-20ma, 4-20ma or voltage outputs: 0-1V, 0-5V, or 0-10V.


    N/A (5) User programmable relays for concentration and diagnostic alarms (1A @ 30Vdc). Options for up to 32 additional relays available.


    N/A Optional digital input board for 3 contact closure inputs. Supports start analysis, start calibration, and analyze calibration gas sample.

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