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Model 851 (Calibrated)


Product Description

Model 851

Investigator's Aid for Detection of Hydrocarbons, Accelerants, Petroleum Volatiles, and Various Gasses

The Model 851 Investigator’s Aid is a Calibrated, precision instrument designed specifically for detecting petroleum volatiles, hydrocarbons and natural gas. The detector features two modes of operation: a High Sensitivity search mode for locating very small gas leaks and a Calibrated mode of operation that indicates 0% to 100% of the lower explosive limit (LEL), with methane used as the test gas.

Please Note: This Product Is Built To Order - Please Allow 4 To 6 Weeks For Delivery.



  • Two Modes of Operation: High or Low Sensitivity
  • Meter Readout Provides Visual Indication of Relative Concentrations of Hydrocarbons
  • Audio and visual indication of detection of accelerants and gases.
  • Electronic Purge Permits Quick Recovery of Sensor Element
  • Mute Switch Turns off audio tones and permits discreet investigation
  • Telescoping Probe with Sensor Guard extends to 45" and retracts to 19" for easy storage


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10.00 LBS


Calculated at checkout