nCLD 899 Y

SupremeLine Trace Gas Analyzer


  • Eddy covariance
  • Background monitoring
  • Flux measurements
  • Long range transport
  • Tropospheric research
  • Certification and calibration


  • Four freely adaptable measurement ranges
  • Remote operation, control and maintenance
  • Pre chamber to offset cross sensitivity
  • Expandable to CraNOx II


1 ppb – 1’000 ppb

Minimum Detectable Concentration

<0.025 ppb


NO, NO2, NOx


SupremeLine Trace Gas Analyzer

The nCLD 899 Y analyzer is the next generation in ultra high precision nitrogen oxide measurement. Unique in speed and reliability, the nCLD 899 Y is modular designed and capable of detecting lowest quantities of NO, NO2 and NOX in the range of parts per trillion. The new and intuitive graphical user interface also individually displays and connects to other instruments’ data.

Convenient and Highly Precise
The nCLD 899 Y fulfills the requirements of many research groups specializing in detection and monitoring smallest variations of N-containing compounds, such as NO, NO2 and NOX. The lag time depends on the settings of the pre chambers, that reduce zero drift and cross sensitivity. It can be reduced to an absolute minimum. The fully revised detector-block, the enhanced gas flow paths and the improved pressure as well as temperature independence of the nCLD Series lift overall stability and reliability to a new level. Calibration and adjustment of the unit runs quick and automatic with all necessary data, including calibration history and status reports, stored continuously.

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 and flexibility for the remote operation, control and maintenance of the nCLD 899 Y, ensuring unsurpassed precision and reliability.

Analyzer type

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

Measuring ranges

four freely selectable ranges from 1 ppb – 1000 ppb

Min. detectable concentration*

<0.025 ppb

Noise at zero point (1σ)*

<0.01 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.

O2 use for O3 generator

100 ml/min, pressurized 2-3 bar

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


42 kg 

Delivery includes

nCLD 899 Y analyzer, power cable, FTDI-RS232-USB cable, USB-LAN adapter, HDMI adapter


nCLD 899 Y: NO, NO2, NOX analyzer

· Y – molybdenum converter

· p – pre chambers

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


· 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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