nCLD 844 Mhr


Modular Gas Analyzer

The nCLD 844 Mhr analyzer is the next generation in two-channel high precision nitrogen oxide measurement. Unique in speed and reliability, the nCLD 844 Mhr is modular designed and capable of simultaneously measuring NO, NO2 and NOX from hot and humid gas sources without additional cooler. The new and intuitive graphical user interface also individually displays and connects to other instruments’ data.

nCLD – A New Generation
The nCLD 844 Mhr includes everything that is needed for measuring NO, NO2 and NOX in unpreconditioned gas samples. The fully revised detector-block, the enhanced gas flow paths and the improved pressure as well as temperature independence of the nCLD 800 Series instruments allow for even lower detection limits. Overall stability and reliability are lifted to a new level. The integrated hot tubing enables the instrument to analyze hot and moist sources without external gas preconditioning unit, allowing highly precise analysis. The calibration of the unit runs quickly and automatically, with all necessary data stored and 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 for your remote operation, control and maintenance of the nCLD 844 Mhr, ensuring unsurpassed precision and reliability.


Analyzer type dual chamber CLD with cooled PMT for measurement of NO, NO2 and NOX
Measuring ranges four freely selectable ranges from 0,5 ppm – 500 ppm
Min. detectable concentration* 0.012 ppm
Noise at zero point (1σ)* 0.006 ppm
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)
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
Interface USB(3x), HDMI, Bluetooth, RS232 (w/o 9pin connector), LAN, WLAN
Dimensions height: 133 mm (5¼”)

width: 450 mm (19”)

with molding: 495mm

depth: 540 mm (21.2”)

Weight 23 kg (51 lb)
Delivery includes nCLD 844 Mhr analyzer, power cable, USB-LAN adapter
Standard nCLD 844 Mhr: NO, NO2, NOX analyzer

· M – metal converter

·  hot tubing

· – electro-mechanical pressure regulation

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.


Further information can be found in the Product Brochure

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