nCLD 822 Mh

Modular Gas Analyzer


  • Burners and boilers
  • Manufacturers of gas turbines
  • Certification and calibration
  • DeNOx Plants
  • Refining of fuels and lubricants
  • Tobacco industry
  • Research and development


  • Rapid system integration and rack mounting
  • Compact and modular design
  • Virtually maintenance free even in continuous operation
  • Four freely selectable measuring ranges (with dual inlet: two per channel)
  • Choice between different types and numbers of converters


5 ppm – 5’000 ppm

Minimum Detectable Concentration

0.25 ppm


NO, NO2, NOx


Modular Gas Analyzer

The nCLD 822 Mh analyzer is the next generation in high precision two-channel nitrogen oxide measurement. Unique in speed and reliability, the nCLD 822 Mh is modular designed and capable of simultaneously measuring NO, NOx and NO2 from hot and humid gas sources without additional cooler. It features a dual inlet option for assessing two different sources at once. The new and intuitive graphical user interface “GUI“ also individually displays and connects to other instruments’ data.

Straight From the Source
The nCLD 822 Mh includes everything that is needed for measuring NO, NOx and NO2 in unpreconditioned gas samples. The integrated hot tubing enables the instrument to analyze hot and moist sources without external gas preconditioning unit, allowing highly precise analysis. Furthermore, the analyzer is adaptable to numerous non-standardized applications. The optionally available electro-mechanical bypass system balances out pressure variations occurring in the sample flow. Dual sample gas inlet is an option that allows the user to measure two different sources simultaneously, enabling comparison of the samples. Calibration and adjustment of the unit runs quick and automatically, while all necessary data is continuously stored and available anywhere and at any time.

User Friendliness with “GUI“
The new touch sensitive graphical user interface “GUI“ enables the user to individually adjust the instrument operation and data management according to his/her needs and applications. The bright 8” monitor gives a clear overview and allows numerical and graphical display of values. Multiple digital in- and outputs guarantee a maximal connectivity for your remote operation, control and maintenance of the nCLD 822 Mh, ensuring unsurpassed precision and reliability.

Compact, Modular and Intelligent!
The nCLD 822 Mh 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 conforms to the standard method for NOX-detection in stationary source emissions (EN 14792).

Measuring ranges four freely selectable ranges from 5 ppm – 5’000 ppm,

with dual sample inlet: two per channel

Min. detectable concentration* 0.25 ppm
Noise at zero point (1σ)* 0.125 ppm
Lag-time <1 sec
Rise time (0-90%) <1 sec
Temperature range 5 – 40 °C
Humidity tolerance 5-95% rel. h (non-condensing, ambient air and sample gas)
Sample flow rate 0.05 l/min. (1.2 l/min with pressure regulation)
Input pressure ambient externally stabilized within ±3 mbar (600–1’200 mbar abs. with pressure regulation)
Dry air use for O3 generator internally generated (no external supply gas required)
Power required 400 VA (incl. membrane pump and ozone scrubber)
Supply voltage 100-230 V/50-60 Hz
Interface USB(2x), HDMI, Bluetooth, RS232 (w/o 9 pin connector), LAN, WLAN
Dimensions height: 133 mm (5¼”)

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

depth: 540 mm (21.2”)

Weight 21 kg
Delivery includes nCLD 822 Mh analyzer, power cable, FTDI-RS232-USB cable, USB-LAN adapter, manual
Standard nCLD 822 Mh: metal converter, hot tubing
Options · steel converter

· electro-mechanical pressure regulation

· dual channel / dual sample inlet

· USB-RS232 9pin connector

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

*depending on filter setting
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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