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SO2 Analyser

UV Fluorescence gas monitor offering excellent performances for the monitoring of SO2 in the range 0-10 ppm or 0-1 ppm. Option: H2S / TRS monitoring

Eco-designed, reference air quality monitor, QAL1 certified by the TÜV, US-EPA approved. Utilizes the standard method for the measurement of sulfur dioxides (EN 14212). With its ultra low power consumption & 24 V supply (option), the AF22e is the sole SO2 monitor on the market able to measure without being connected to the power grid.


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The AF22e is a continuous ambient air-quality monitoring analyzer (CAMs), based on the ultraviolet fluorescence principle, which is the standard method for the measurement of SO2 concentration (EN 14212).


  • Superior metrological performances for SO2 measurements in ranges 0-10 ppm or 0-1 ppm
  • Innovative design of the optical module for excellent sensitivity and signal stability
  • Real-time calibration graph, animated synoptic, auto-diagnostic, control and maintenance data screens can be displayed while the instrument is operating
  • Embedded Communication Protocol for XR® Software with automatic recognition and configuration
  • Able to withstand temperatures up to 45-50 °C without air conditioning
  • Special architecture means that no additional pump is necessary in case of permeation bench (in option)
  • Automatic recognition of plugged electronic boards or optional devices: plug & play principle
  • Smart, connected instrument with embedded web server for the easiest, full remote control and operation of the analyzer from any PC, tablet or smartphone (configuration, calibration, test, diagnostic parameters…)
  • Integrated web-server with full remote emulation of the analyzer through the ENVEA Connect free app

The e-Series of analyzers has been fully eco-designed, with special consideration for the environmental impacts of the product during its whole lifecycle. The exclusive “inside the box” foam modular concept makes the product more robust, power-saving, quieter in operation, simpler to servic

  • Continuous indoor and outdoor air quality monitoring
  • Stationary and mobile AQMS laboratories
  • Industrial fence-line monitoring
  • Continuous emissions monitoring (CEM) by dilution
  • Laboratory & field studies on SO2 / H2S / TRS effects…
  • Background (urban or suburban) Rural, Traffic, Kerbside measurement campaigns and monitoring studies


Measured parameterSO2
TechnologyUV Fluorescence
US-EPA Approval / QAL 1 CertificationYES
Measurement ranges0-1 ppm or 0-10 ppm user-defined
Measurement unitsppb, ppm, µg/m3 user-defined
Lower Detectable Limit (2σ)< 0.4 ppb
Noise (σ)< 0.2 ppb
Zero drift< 1 ppb / 24h
Span drift< 0.5% / 7 days
Linearity± 1%
Sample flow rate20L/h
Sample pumpinternal
Temperature range0°C to +40°C
Data storage1 year
Weight (Kg)9,8
Dimensions mm (LxWxH)483 x 545 x 133
Chassis19″ Rack, 3U
Power supply115 V, 60 Hz – 230 V, 50 Hz
24 V optional
Pressure and temperature compensationYES


  • 2008/50/EC, EN 14212, EN 15267, 40 CFR PART 53 SUB B and SUB C
  • QAL 1 certified by the TÜV to N° 0000051690
  • U.S. EPA approved as compliant with EQSA-0802-149
    ENVEA monitoring solutions are European QAL 1 certified and in compliance with the latest international regulations & standards.
    They are also approved and certified by various laboratories and organizations around the world such as: US EPA, TÜV, GOST, CEN, JQA, CNEMC, JMOE, KTL, CNSA, LCSQA…


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