Applications - Environmental / Atmospheric

Benzene Fenceline Monitoring

 The MAX300-AIRTM Environmental Gas Analyzer can measure fugitive benzene at < 0.6 µg/m3 (0.2 ppb).  Recent amendments to 40 CFR 60 and 63 have lowered the actionable level to 9.0 µg/m3 (2.8 ppb),  at this concentration Extrel mass spectrometers offer a real-time, fully automated solution with better than 99.9% accuracy.  

Air is pulled continuously from the sample points back to the MAX300-AIR for analysis. There is no need for personnel to manually collect samples, or send anything to an offsite lab, and real-time alerts of benzene transients are crucial for easily and accurately identifying the source.

For over 45 years Extrel has provided the very best support to industry for their environmental and emissions applications.  

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  MAX300-AIR Measurements

Fenceline Benzene Levels

Total sulfur

TWA Exposure Values

BTU (Energy content)

Explosive Limit Analysis


Quantitative analysis of individual contaminants

ppt detection limits

Analysis time in seconds

Multiport sample systems for total site monitoring

High precision and accuracy for safety and regulatory reporting

Low maintenance and calibration required

  • Detectable compounds: Any gas or vapor sample
  • Detection Range: 100% - 10 ppb standard, 10 ppt w/ membrane inlet*
  • Number of sample streams: 16, 31, 40, 80, 120, 160+
  • Analysis rate: 0.4 Seconds per component
  • Number of components: Unlimited
  • Number of analysis routines: Unlimited
  • Number of user configurable data tags: Unlimited
  • Analysis precision: ±0.25% Relative Standard Deviation**
  • Stability: ±0.5% Relative Standard Deviation**
  • Filaments: Two, one active and one spare with automatic switchover
  • Maintenance: Minimal
    •  Manual or fully automated calibration and validation
  • Mass range options: 1-200, 300, 500 amu
  • 19 mm High-transmission Quadrupole filter

*Matrix dependent. Documented on trace benzene in air

**Based on the analysis of 1% argon

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