Ambient Level Gas Analyzer 

The nCLD AL is the next generation in single-channel high precision ambient air monitoring instrumentation. Unique in speed and reliability, the nCLD AL is modular designed and capable of sequentially 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 AL 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 AL is a one-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 AL, ensuring unsurpassed precision and reliability.

Compact, Modular and Intelligent!
The nCLD AL 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 single chamber CLD with cooled PMT for sequential 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 30 sec (min. toggle interval)
Rise time (0-90%) <1 sec (single-channel mode)
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
Interface USB(3x), HDMI, Bluetooth, RS232 (w/o 9pin connector), LAN, WLAN
Dimensions height: 133 mm (5¼ ”)

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

depth: 540 mm (21.2 ”)

Weight 23 kg (51 lb.)
Delivery includes nCLD AL analyzer, power cable, FTDI-RS232-USB cable, USB-LAN adapter, HDMI adapter
Standard nCLD AL · Y – molybdenum converter

· toggle mode for NO2 measurement

Options · 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.


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