Flare Gas

Flare Gas

New regulations of flare emissions require oil refineries and chemical plants to analyze the vent gas and quickly make adjustments to maintain sufficient destruction efficiency.  

The MAX300-RTG real-time gas analyzer is currently used at many US refineries for NSPS Subpart Ja sulfur monitoring. The analyzer measures the full, speciated composition of the flare gas and delivers continuous updates of NHV, H2S, and Total Sulfur several times per minute.

According to new requirements in the General Provisions, flares used as Air Pollution Control Devices (APCD) are expected to achieve 98% Hazardous Air Pollutant (HAP) destruction efficiencies. These updated requirements include monitoring of the pilot flame, visible emissions, flare tip velocity, net heating values, and dilution parameters, as well as maintaining a Flare Management Plan and a Continuous Parameter Monitoring System Plan.  The MAX300-RTG real-time gas analyzer is an ideal fit for this monitoring system plan.


Mass Range: 1-250, 300, 500 amuMAX300-RTG

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: Up to 0.1 Seconds per component

Number of Components:  Unlimited

Number of Analysis Routines: Unlimited

Number of User Configurable Data Tags: Unlimited

Analysis Precision: ±0.05% Relative Standard Deviation**

Stability: ±0.5% Relative Standard Deviation**

Filaments: Two, one active and one spare with automatic switchover


  • Minimal
  • Manual or fully automated calibration and validation

19 mm High-transmission Quadrupole filter

*Matrix dependent. Documented on trace benzene in air

**Based on the analysis of 1% argon

Questions? We’re here to help.

Extrel CMS, LLC 
575 Epsilon Drive
Pittsburgh, PA 15238