E-Series AF22e Sulfur Dioxides Analyzer SO₂

SKU: AF22e

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.

  • Brand


Envea Ambient


  • 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


Technical specifications
Measured parameter SO2
Technology UV Fluorescence
US-EPA Approval / QAL 1 Certification YES
Measurement ranges 0-1 ppm or 0-10 ppm user-defined
Measurement units ppb, 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 rate 20L/h
Sample pump internal
Temperature range 0°C to +40°C
Data storage 1 year
Included I/O 1LAN/3USB/WIFI/2DRY
Weight (Kg) 9,8
Dimensions mm (LxWxH) 483 x 545 x 133
Chassis 19″ Rack, 3U
Power supply 115 V, 60 Hz – 230 V, 50 Hz
24 V optional
Pressure and temperature compensation YES


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