nCLD 811 CM

SupremeLine Gas Analyzer


  • Emissions test benches
  • Testing of burner systems
  • Catalyst development
  • Engine test cells
  • Car production
  • Exhaust analysis


  • Compact design without any additional space required
  • Minimized CO2 and H2O quenching
  • Four freely selectable measurement ranges
  • Touch screen operation or remote operation


1 ppm -10’000 ppm

Minimum Detectable Concentration

1 ppb


NO, NO2, NOx, NH3, NOx

– Amines


SupremeLine Gas Analyzer

The nCLD 811 CM is the next generation in two-channel emissions monitoring instrumentation. Unique in speed and reliability, the nCLD 811 CM is modular designed and allows the continuous analysis of NO, NO2, NOX, NH3 and NOX-Amines in raw exhaust gasses and other samples with NOX concentrations ranging from several thousand ppm down to a ppb. Its graphical user interface also individually displays and connects to other instruments’ data.

Straight from the Source
The nCLD 811 CM fulfills the high requirements of the automotive industry when it comes to generating reproducible and reliable NOX and ammonia data. Furthermore, it is also very well suited for equally difficult measurement tasks. With its heated inlet and automated pressure control, the analyzer is able to handle rough samples, such as raw exhaust gas. The nCLD 811 CM analyzer is optimized for the measurement of N-containing compounds, such as NO, NO2, NH3, NMP (N-Methyl-2-pyrrolidone) and amines. This is the result of an extended range of capabilities designed in this state of the art monitor, that is virtually maintenance free.

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 811 CM, ensuring unsurpassed precision and reliability. Calibration of the unit runs quick and automatically with all necessary data available anywhere and at any time.

Compact, Modular and Intelligent!
The nCLD 811 CM 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.

Analyzer type

dual chamber CLD with cooled PMT for measurement of NO, NO2, NOX, NH3 and NOX-Amines

Measuring ranges

four freely selectable ranges from 1 ppm – 10’000 ppm

Min. detectable concentration*

1 ppb

Noise at zero point (1σ)*

0.5 ppb

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

650 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: 178 mm

width: 450 mm

with molding: 495mm

depth: 540 mm


48 kg 

Delivery includes

nCLD 811 CM analyzer, power cable, FTDI-RS232-USB cable, USB-LAN adapter


nCLD 811 CM: NO, NO2, NOX, NH3, NOX-Amines analyzer

· M – metal converter

· h hot tubing

· r – electro-mechanical pressure regulation

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


· V8 – valve manifold

· 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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