Ambient Level Gas Analyzer

QAL1 certified according to VDI 4202-1, ISO EN 14211, ISO EN 15267-1 and ISO EN 15267-2


  • Ambient air monitoring
  • Outdoor and indoor application
  • Research


  • Precise and continuous ambient air monitoring
  • Measurement of pollutants in fixed and mobile stations
  • Indoor air quality
  • TLV and personnel safety


  • Compact and modular design
  • Adaptable measurement ranges
  • Remote operation, control and maintenance
  • Graphical user interface “GUI“ for individual analyzer operation and data Management


100 ppb – 50 ppm

Minimum Detectable Concentration

0.4 ppb


NO, NO2, NOx


Ambient Level Gas Analyzer

The nCLD AL2 is the next generation in two-channel high precision ambient air monitoring instrumentation. Unique in speed and reliability, the nCLD AL2 is modular designed and capable of simultaneously measuring NO, NO2 and NOX. The analyzers expandable capabilities allow assessment of additional nitrogen based parameters. Its graphical user interface also individually displays and connects to other instruments’ data.

Flexible Ambient Air Monitoring
The nCLD AL2 is the ideal instrument for ambient air monitoring, either installed in racks, fixed monitoring stations or mobile laboratories. Besides the ambient air in the open environment, the analyzer is also suitable for air quality monitoring in production plants and offices (TLV = threshold limit value). The nCLD AL2 is a two-channel NOX-detector based on a modular principle. The measurement ranges are individually adjustable, the parameters are NO, NO2 and NOX and the instrument’s inlet operates at ambient pressure. Calibration of the unit runs quick and automatic while all necessary data is continuously stored and readily available anywhere and at any time.

User Friendliness
The new touch sensitive graphical user interface enables the user to individually adjust the instrument operation and data management according to his/ her needs and applications. The bright 7” monitor gives a clear overview and allows numerical and graphical display of values. Multiple digital in- and outputs guarantee a maximal connectivity and flexibility for the remote operation, control and maintenance of the nCLD AL2, ensuring unsurpassed precision and reliability.

Compact, Modular and Intelligent!
The nCLD AL2 is manufactured in a new compact and modular layout, in which each essential component of the chemiluminescence analyzer hosts its own CPU and interacts with other CPUs by BUS-communication. This assembly increases accessibility and serviceability by reducing wiring and piping. The measurement principle will conform to the standard method for NOX-detection in ambient air (EN 14211).


Analyzer type

dual chamber CLD with cooled PMT for simultaneous measurement of NO, NO2, NOX

Measuring ranges

four freely selectable ranges from 100 ppb – 50’000 ppb

Min. detectable concentration*

0.4 ppb

Noise at zero point (1σ) *

<0.2 ppb

Lag time

<3 sec

Rise time (0-90%)

<1 sec

Temperature range 

0 – 40 °C

Humidity tolerance 

5-95% rel. h (non-condensing, ambient air and sample gas)

Sample flow rate

1.0 l/min

Input pressure

600 -1200 mbar abs.

Dry air use for O3 generator

internally generated (no external supply gas required)

Power required

350 VA (incl. membrane pump and ozone scrubber)

Supply voltage

100-240 V/50-60 Hz


USB(3x), HDMI, Bluetooth, RS232 (w/o 9pin connector), LAN, WLAN


height: 133 mm (5¼ ”)

width: 450 mm (19 ”) with molding: 495 mm

depth: 540 mm (21.2 ”)


23 kg (51 lb.)

Delivery includes

nCLD AL2 analyzer, power cable, FTDI-RS232-USB cable, USB-LAN adapter, HDMI adapter



· Y – molybdenum converter


· USB-RS232 9pin connector

· Analog output (external box): 0-10 V ; 4-20 mA into 500 Ω max.



*Depending on filter setting.

Connectivity properties are country-specific.

ECO PHYSICS reserves the right to change these specifications without notice.


Further information can be found in the Product Brochure

Download Brochure


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