Model N​200H
High Range Chemiluminescence NOX-NO2-NO Analyzer
with NumaView™ Softwar​​​​​e


​The Model N200H uses the proven chemiluminescence detection principle, combined with a state-of-the-art modular architecture, and intuitive operating software to provide accurate and dependable measurements of high-level Nitric Oxide (NO), Nitrogen Dioxide (NO2) and total Nitrogen Oxides (NOx) gases for use in extractive type CEM systems.

The instrument reaction cell uses a diffusion-based inlet nozzle to minimize build-up of contamination on the optics, reducing the frequency of maintenance and minimizing drift. Stability is further enhanced using an automatic baseline reference cycle which compensates for any potential baseline drift. The result is sensitive, accurate, and dependable performance under the harshest operating conditions. The N200H can be fitted with an optional, integrated paramagnetic ​Oxygen (O2) sensor, reducing costs of integration and operation of a separate analyzer.

Instrument functions and controls are managed through a series of integrated microprocessor-controlled modules utilizing a simple and reliable CAN Bus communications architecture. Each module is independently assembled and calibrated allowing easy and fast field replacement to maximize instrument uptime.

Intuitive operation and calibration of all N Series products is achieved through the NumaView™ Software interface. The graphical user interface (GUI) is customizable, giving the user fast and efficient access to instrument status, as well as measurement data and diagnostic parameters in either numeric or graphical form. NumaView™ Remote Software (included at no charge) provides the same virtual interface and complete instrument control, as well as access to the instrument’s large internal data storage buffer from a remote PC or tablet.​


  • Single or dual range capability
  • Stainless-steel NO2 converter
  • Automatic converter efficiency compensation
  • Customizable alerts and continuous self-checking
  • Wide operating temperature range
  • Internal DC-powered pump (optional)
  • Integrated Oxygen (O2) sensor (optional)


 Measurement Units
​ppm, mg/m3 (selectable) 
​​​ Response Time
​< 80 seconds to 95% (in switching mode)

Min: 0 - 5 ppm full scale
Max: 0 - 5,000 ppm full scale (selectable, independent NO, NO2, NOX ranges with dual-range supported)
 Sample Flow Rate​290 cc/min ±10%
 Zero Noise< 20 ppb (RMS)
 Span Noise< 0.2% of reading (RMS) above 20 ppm
 Lower Detectable Limit
< 40 ppb

​0.5% of reading above 5 ppm

​​ Linearity
​1% of full scale
 Zero Drift
< 20 ppb/24 hours
 Span Drift< 0.5% of reading/24 hours
 Included I/O1 x Ethernet (TCP/IP)
1 x RS232
2 x front panel USB device ports​
 Optional I/O
​Universal Analog Output Board includes (all user-definable):
4 x Isolated Voltage Outputs (5V, 10V; user-selectable)
3 x Individually Isolated Current Outputs (4-20mA)
​Digital I/O Expansion Board includes:
3 x Isolated Digital Input Controls
5 x Isolated Digital Output Controls (user-definable)
3 x Form C Relay Alarm Outputs (user-definable)​
Analyzer: 35 lbs (15.9 kg)
External pump: 22 lbs (10 kg)

 ​Dimensions (HxWxD)
​7” x 17” x 24.3” (178 x 432 x 617 mm)
 Operating Temperature​0 - 40°C​

​​​​ Power

Specifications are subject to change without notice.
All specifications are based on constant conditions.​​​
​Analyzer: 100V-240V, 50/60 Hz, Typical consumption 150W
External pump: 115V, 60 Hz, Typical consumption 165W​
​                             220-240V, 50/60 Hz, Typical consumption 165W