AS32M- analyzer for quick and direct (without conversion) NO2 monitoring
Designed to alleviate potential disadvantages of the chemiluminiscence method and to provide the most accurate value for NO2 concentration measurements.
- Direct and continuous monitoring of Nitrogen Dioxides
- Provides fast and accurate NO2 measurements
- Extremely compact, easy to use with minimal maintenance (periodic change of particle filter)
- Completely autonomous, automatic and capable of detecting short events with high precision
- Direct measurement of the sample - no chemical conversion required
- Innovative technology plus touch screen convenience (optionally)
U.S. EPA Certified:
US EPA Automated Equivalent Method (FEM): EQNA-0913-210

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Ambient air quality monitoring
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Indoor air quality continuous monitoring
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Mobile and fixed monitoring stations
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Traffic stations: near-road, tunnels, canyon streets
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Medical gases measurements...
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NO2 measurement according to the European Directive 2008/50/CE
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Direct and continuous monitoring of ambient NO2
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Extremely compact, easy to use with minimal maintenance (periodic change of particle filter)
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Completely autonomous, automatic and capable of detecting short events with high precision
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Direct measurement of the sample - no chemical conversion required
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Innovative technology plus touch screen convenience (optional)
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Visible (450 nm) absorption measurement using patented Cavity Attenuated Phase Shift (CAPS) technology
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Measurement of ambient concentrations to 1000 ppbv
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Essentially interference-free
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Insensitive to the presence of varying levels of nitric oxide, aerosols, humidity and other trace atmospheric species
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No Toxic Gas Emissions
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Real-time synoptic flow diagram display
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Linear Response (0-1000 ppbv)
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Built-in USB port and serial interface (RS 232 / RS 422)
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Full remote emulation of the analyzer
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TCP/IP remote control with dynamic, multilingual interface, featuring intuitive navigation by pictograms
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NEW: onboard web server compatible with any internet browser. es@cloud™ user interface with online help for the display, configuration, maintenance, diagnostics or software updating of the analyzer, remotely, from any PC, tablet or Smartphone
- Measurement Range: 0-1 ppm
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Detection limit (2s): 0.1 ppb
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Repeatability standard deviation at zero: 0.05 ppb
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Repeatability standard deviation at a level of the hourly limit value (200μg/m3 ): 0.2 ppb
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Short zero drift: 0.75 ppb (24h)
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Short span drift: 1.5 ppb
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Response time (rise): 16 s
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Response time (fall): 16 s
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Difference between rise time and fall time: <1s
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Lack of fit (linearity)(residual from the linear regression function): <4%
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Lack of fit (linearity) at zero (residual at zero): 0.6 ppb (24h)
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Sensitivity coefficient of surrounding temperature (0 to 30°C):
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Autonomy: up to one year of NO2 measurements (on 1/4 h sampling rate)
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Valves block for selection of external zero and span gas
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Sample dryer
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Ethernet network connection
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Integrated web-server with full remote emulation of the analyzer
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7" color touch screen
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ESTEL electronic board (1 or 2) with:
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4 independent analog inputs
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4 independent analog outputs
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4 remote control inputs
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6 dry contacts outputs
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SOREL electronic board with:
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4 dry contacts outputs
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4 dry contacts inputs
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Built-in permeation bench with NO2 tube