9110TH Series​

NO / NO2 / NOX Analyzers


The Model 9110T uses the proven chemiluminescence detection principle, coupled with state-of-the-art microprocessor technology to provide the sensitivity, stability and ease of use needed for ambient or dilution CEM requirements for monitoring levels of oxides of nitrogen.

Modular Design

The modular design offers top-mounted access to all components while hinged front and rear panels simplify module replacement. The unique modular sealed ozone generator provides improved voltage coefficient, safety and reliability. A standard permeation dryer on the ozone generator means there is no desiccant to replace. In addition, the excess ozone is removed by catalytic reaction, eliminating the need for frequent charcoal scrubber replacement. The 9110TH combines rugged construction, ease of use, powerful diagnostics and outstanding performance for higher range applications.


The analyzer uses multi-tasking software which allows complete control of all functions while providing online indication of important operating parameters. Measurements are automatically compensated for temperature and pressure changes. In addition, stability is enhanced by an auto-zero circuit that continuously provides a true zero reference. The result is sensitive, accurate and provides dependable performance under the harshest operating conditions.


The 9110TH uses the same field-proven chemiluminescent technique for monitoring high levels of oxides of nitrogen. User-selectable ranges of 0-5000 ppm make it ideal for a wide variety of applications including CEM, stack testing, cement kiln inlet for clinker quality control and process control. A choice of NO2 to NO converters handles tough applications such as thermal DeNOX and stack testing. Selectable measurement modes (NO only, NOX only, NO/NOX switching), auto-ranging and remote range control customizes the system for the end user.

Additional Advantages

Both 9110T models offer an advanced color display, capacitive touch screen, intuitive user interface, flexible I/O and built-in data acquisition capability. All instrument setup, control and access to stored data and diagnostic information is available through a front panel or via RS-232. Ethernet or USB com ports are also available either locally or by remote connection using the included APIcom™ software.​

Available Options

Calibration Options

  • Ambient zero and ambient span

  • Ambient zero and pressurized span

  • Zero scrubber and 2 pressurized spans

  • Zero air scrubber for Z/S valves

Mounting Options

  • Rack mount brackets with chassis slides

  • Rack mount brackets only

  • Handle

Other Options

  • ​Paramagnetic O2 Sensor

  • CO2 Sensor

  • Internal moly converter with O3 killer, instead of mini-hicon

  • Concentration alarm relays

  • Expendables kit


  • Utilizes proven method of vacuum chemiluminescence for monitoring of nitric oxide (NO) and nitrogen dioxide (NO2) measures total NOX

  • Ranges from 0-5 ppm to 0-5,000ppm

  • Single, compact, 19" rack-mounted module

  • Reliable Photo-Multiplier Tube (PMT) detector

  • Operating temperature of electronics: 41° to 104°F (5° to 40°C)

  • Particulate filter

  • Vacuum pump to draw sample gas into the reaction chamber - designed to analyze at atmospheric pressure

  • Integral sample system includes ozonator​, reaction chamber and all flow meters, regulators, valves, tubing and fittings

  • Integral catalytic converter changes all NO2 in the gas sample to measurable NO, thus providing a total NOX measurement (NO + NO2)

  • Vacuum pump provided as an accessory

  • Provided with ears for easy mounting

  • Large, luminescent touch-screen display with easy-to-view characters

  • Menu-driven functionality and numerous parameters detected with microprocessor-based functionality

  • One 4-20 mA (isolated) analog output included

  • Up to 4 analog outputs, 4-20 mA or settable voltage type (0-100 mV, 0-1 V, 0-5 V, 0-10 V)

  • Ethernet and 2 x RS-232 digital outputs (optional USB, RS-485 or multidrop RS-232 available)

  • 8 x opto-isolated digital outputs and 6 x opto-isolated digital inputs

  • Power: 110 VAC or 220 VAC, 50/60 Hz (user to specify)​



​Min:                       0-50 ppm full scale
Max:                      0-5,000 ppm full scale 
                               (selectable, independent NO, NO2, NOX ranges and auto ranging supported)
Analog Output:   10V, 5V, 1V, 0.1V (selectable


​Zero:                     < 20 ppb (RMS)
Span:                    < 0.2% of reading (RMS) above 20 ppm


​Zero:                     < 20 ppb/24 hours
Span:                    < 0.5% of full scale/24 hours


​Lag Time:   20 seconds
Rise/Fall:    < 60 seconds to 95% (in switching mode)


​1% of full scale


​0.5% of reading above 5 ppm

​Sample Flow

​290 cm3/min ± 10%


​100V-120V, 220V-240V, 50/60 Hz


​± 10%


Included I/O:       1 x Ethernet (10/100 Base-T)
                              2 x RS-232 (300-115, 200 baud)
                              2 x USB devise ports
                              8 x opto-isolated digital outputs
                              6 x opto-isolated digital inputs
                              4 x digital alarm outputs (3 x 4-20 mA current outputs)
Optional I/O:       1 x USB com port
                              1 x RS-485 
                              8 x analog inputs (0-10V, 12-bit)
                              4 x digital alarm outputs
                              Multidrop RS-232​


​41° to 104°F (5° to 40°C)


​7"H x 17"W x 23.5"D (17.8 x 43.2 x 59.7 cm)
Analyzer weight: 40 lbs (18 kg)
External Pump weight: 15 lbs​ (7 kg)



​File Size​

Model 9110TH Brochure


Model 91​10TH Manual