nCLD 822 Mr

Modular Gas Analyzer


  • Gas manufacturers
  • Manufacturers of gas turbines
  • Certification and calibration
  • DeNOx plants
  • Stack gas measurement
  • Petrol 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


5 ppm – 5’000 ppm

Minimum Detectable Concentration

0.25 ppm


NO , NO2 , NOx


Modular Gas Analyzer

The nCLD 822 Mr analyzer is the next generation in high precision two-channel nitrogen oxide measurement. Unique in speed and reliability, the nCLD 822 Mr is modular designed and capable of simultaneously measuring NO, NO2 and NOX from sources with pressure variations. The new and intuitive graphical user interface also individually displays and connects to other instruments’ data.

Versatile and Adaptable
The nCLD 822 Mr includes everything that is needed for measuring NO, NO2 and NOX in samples with pressure variations. The integrated electro-mechanical bypass system balances out pressure variations occurring in the sample flow, enabling highly precise analysis. Furthermore, the analyzer is adaptable to numerous non-standardized applications. The optionally available hot tubing enables the instrument to measure hot and moist sources. Dual sample gas inlet is an option that allows the user to measure two different sources in parallel, enabling comparison of the samples. Calibration and adjustment of the unit runs quick and automatically, while all necessary data is continuously stored.

User Friendliness
The new and intuitive 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 822 Mr.

Compact, Modular and Intelligent!
The nCLD 822 Mr 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 15267).

Analyzer type

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

Measuring ranges

four freely selectable ranges from 5 ppm – 5000 ppm

Min. detectable concentration*

0.12 ppm

Noise at zero point (1σ)*

0.06 ppm

Lag time

<3 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)

Dry air use for O3 generator

internally generated (no external supply gas required)

Sample flow rate

1.0 l/min

Input pressure

600 – 1’200 mbar abs.

Power required

350 VA (incl. membrane pump and 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: 495mm

depth: 540 mm (21.2”)


23 kg (51 lb)

Delivery includes

nCLD 822 Mr analyzer, power cable, USB-LAN adapter


nCLD 822 Mr: NO, NO2, NOX analyzer

· M – metal converter

· r – electro-mechanical pressure regulation


· V1 – single calibration valve

· V2 – two calibration valves for pressurized calibration (zero & span / 2-3 bar)

· h hot tubing

· 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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