nCLD 66

Gas Analyzer


  • Ambient monitoring in areas with excellent air quality
  • Indoor NO2 measurements
  • Permanent monitoring of clean room conditions in R&D labs
  • Biomedical and pharmaceutical research
  • Plant physiological research


  • Compact design
  • Internal ozone generator and scrubber
  • Molybdenum or metal converter for NOX detection
  • Four freely selectable measurement ranges
  • Operation and control via touchscreen
  • Mobile DC operation


50 ppb – 25’000 ppb

Minimum Detectable Concentration

0.5 ppb


NO / NOx


Gas Analyzer

The nCLD 66 is the next generation in one-channel ambient air monitoring instrumentation. Unique in speed and precision, the nCLD 66 is modular designed and expandable to additional nitrogen based parameters. Its graphical user interface “GUI“ also individually displays and connects to other instruments’ data.

Flexible Ambient Air Monitoring
The nCLD 66 is the ideal instrument for ambient air monitoring, either installed in racks, fixed monitoring stations or mobile laboratories. Besides the ambient air in the open environment, the analyzer is also suitable for air quality monitoring in production plants and offices (TLV = threshold limit value). The nCLD 66 is a one-channel NOx-detector based on a modular principle. The measurement ranges are individually adjustable, the parameters are NO, NO2 and NOx and the instrument’s inlet operates at ambient pressure. Calibration and adjustment of the unit runs quick and automatic while all necessary data is continuously stored and readily 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 and flexibility for the remote operation, control and maintenance of the nCLD 66, ensuring unsurpassed precision and reliability.

Compact, Modular and Intelligent!
The nCLD 66 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 ambient air (EN 14211).

Measuring ranges

four freely selectable ranges from 50 ppb – 25’000 ppb

Min. detectable concentration*

0.5 ppb

Noise at zero point (1σ) *

0.25 ppb

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

100 ml/min

Input pressure

ambient externally stabilized within ±3 mbar

Dry air use for O3 generator

internally generated (no external supply gas required)

Power required

280 VA, external membrane pump: 250 VA

Supply voltage

100-230 V/50-60 Hz


USB(2x), HDMI, Bluetooth, RS232 (w/o USB-RS232 9pin connector), LAN, WLAN


height: 133 mm (5¼”)

width: 430 mm (17”), with molding: 495 mm

depth: 540 mm (21.2”)


15kg (33 lb) with 8kg accessories

Delivery includes

nCLD 66 analyzer, power cable, USB-LAN adapter, manual


nCLD 66: molybdenum converter


· steel converter

· rack mount slides

· inlet filter

· USB-RS232 9pin connector

· FTDI-RS232-USB cable

· 24 V operation incl. DC vacuum pump

· 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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