nCLD 811 M

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


SupremeLine Gas Analyzer

The nCLD 811 M is the next generation in two-channel emissions monitoring instrumentation. Unique in speed and reliability, the nCLD 811 M is modular designed and allows the continuous and simultaneous analysis of NO, NO2 and NOX in raw exhaust gasses 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.

When Decimals are Decisive
The nCLD 811 M fulfills the requirements of the automotive industry when it comes to producing reproducible and reliable NOX data. With the heated inlet and the built in automated pressure control system, the analyzer is capable of handling rough samples, such as raw exhaust gas. With a detection limit as low as 1 ppb, the nCLD 811 M is also suited for analyzing bag samples. The instrument has a broad range of capabilities designed to fit into this state of the art NOX monitor with included temperature stabilization. Furthermore, calibration and adjustment of the unit runs quickly and automatically with all necessary data stored and available.

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 M, ensuring unsurpassed precision and reliability.

Compact, Modular and Intelligent!
The nCLD 811 M 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 and NOX

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 M analyzer, power cable, USB-LAN adapter


nCLD 811 M: NO, NO2, NOX 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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