Differential Optical Absorption Spectrometry (DOAS) is a UV/VIS optical measurement technique based on Beer-Lambert’s Law. Since absorption coefficients in the UV are generally orders of magnitude higher than in the IR region, sensitivity is usually enhanced, which makes DOAS a method for measuring relatively low concentrations.

• Ultra High Accuracy & Sensitivity
• Cross stack Non Intrusive
  • No parts located in process stream
  • No corrosion
  • No particulate buildup on probe
  • Do not have to pull heavy analyzer off of stack port
• Immediate Response Time
• Minimal Maintenance & consumable parts required
  • Clean optics enclosure windows periodically
  • Lamp .5-2 Years
• Meets & exceed EPA Performance Specifications
  • Calibration and Certification/RATA Requirements per 40 CFR Part 60 regulations
• Compact & Easy to Install and Operate
  • Low Operating Costs

DOAS Uses broadband UV light source instead of a laser light source so Multiple gases can be measured with a single analyzer!