Model T200U NOy with NumaView™ Software

​Trace Level Chemiluminescence NO-NOy Analyzer​

General Details

​Trace Level Chemiluminescence NO-NOy Analyzer​

The Model T200U NOy analyzer has been developed and refined specifically to address the challenges of NOy monitoring as required, for example, in the US NCore network.  It uses the proven chemiluminescence principle and is coupled with a remote NOy converter via umbilical to allow measurements with a lower detectable limit of 50 ppt.

The Model T200U NOy analyzer combines a gold plated reaction cell with an enhanced performance pump, special low noise photomultiplier tube, and unique signal conditioning to provide exceptional sensitivity.  In addition, a pre-reactor separates the NO-O3 reaction from background chemiluminescence to allow accurate auto-zero of the analyzer.  The remote NOy converter is provided with a stainless steel, NEMA 4X (IP65) enclosure and custom sample umbilical to allow a mounting height of 10 meters.  In addition, the converter features a unique purge circuit designed to remove residual calibration gas.

All T Series instruments offer an advanced color display, capacitive touch screen, intuitive user interface, flexible I/O, and built-in data acquisition capability.  All instrument set up, control and access to stored data and diagnostic information is available through the front panel, or via RS232, Ethernet, or USB com ports, either locally or by remote connection.

The Model T200U NOy comes with the Numaview™ Software. NumaView™ Remote PC Software allows for a remote connection with virtual interface and data downloading capability to analyzers operating NumaView™ Software.

  • Ranges: 0-5 ppb to 0-2,000 ppb, user selectable
  • Independent ranges and auto ranging
  • Dual Sample Conditioner included​
  • Large, vivid, and durable color graphics display with touch screen interface
  • Ethernet, RS-232, and (optional) USB com ports
  • Front panel USB connections for peripheral devices and firmware upgrades
  • 8 analog inputs (optional)
  • Adaptive signal filtering optimizes response time
  • Temperature & pressure compensation
  • 50 ppt lower detectable limit
  • Catalytic ozone scrubber
  • Comprehensive internal data logging with programmable averaging periods
  • Ability to log virtually any operating parameter
  • Two-year warranty
  • External converter not shown above​​
Ranges Min: 0-5 ppb Full scale
Max: 0-2,000 ppb Full scale (selectable, independent NO, NOy ranges)
Measurement Units ppb, μg/m3 (selectable)
Zero Noise < 25 ppt (RMS)
Span Noise < 0.5% of reading (RMS) above 5 ppb
Lower Detectable Limit < 50 ppt
Zero Drift < 0.1 ppb/24 hours
Span Drift < 0.5% of reading/24 hours
Response Time < 70 seconds to 95%
Linearity 1% of full scale
Precision 0.5% of reading above 5 ppb
Sample Flow Rate 1800 cc/min ±200 cc/min (NO & NOy)​
Power Requirements 100V-120V, 220V-240V, 50/60 Hz, Typical power 110W
Analog Output Ranges 10V, 5V, 1V, 0.1V (selectable)
Recorder Offset ±10%
Included I/O 1 x Ethernet: 10/100Base-T
2 x RS232 (300-115,200 baud)
2 x USB device ports
8 x opto-isolated digital outputs
6 x opto-isolated digital inputs
4 x analog outputs
Optional I/O 1 x USB com port
1 x RS485
4 x digital alarm outputs
Multidrop RS232
3 x 4 – 20mA current outputs
Operating Temperature Range 5 – 40ºC
Dimensions (HxWxD) Analyzer: 7” x 17” x 23.5” (178 x 432 x 597 mm)

Specifications are subject to change without notice.
All specifications are based on constant conditions.​
Analyzer: 40 lbs (18 kg)
NOy Bypass Pump Assembly: 28 lbs (12.7 kg)
Converter with umbilical: 42 lbs (19.05 kg)
External pump: 22 lbs (10 kg)

The following table provides a list of items that  need regular maintenance to ensure your product remains in good working condition.

TEST functions Review and evaluate Weekly No
Particulate filter Change particle filter Weekly (if in stack system: As Needed) No
Zero/span check Evaluate offset and slope Weekly No
Zero/span calibration Zero and span calibration Every 3 months Yes
External zero air scrubber option Exchange chemical Every 3 months No
External dryer option Replace chemical When indicator color changes No
Ozone cleanser Change chemical Annually Yes
Reaction cell window (“optical filter”  Figure 11‑6 in manual) Clean Annually or as necessary Yes
DFU filters Change particle filter Annually No
Pneumatic sub-system Check for leaks in gas flow paths Annually or after repairs involving pneumatics Yes if a leak is repaired
Reaction cell O-rings & sintered filters Replace Annually Yes 
PMT Sensor Hardware Calibration Low-level hardware calibration On PMT/ preamp changes or if slope is outside of 1.0±0.3 Yes
Pump Rebuild head when RCEL pressure exceeds 10 in-Hg-A (at sea level) Yes
Inline Exhaust Scrubber Replace Annually No
NO2 converter Replace converter Every 3 years or if conversion efficiency drops below 96% Yes 
Desiccant  bags Replace Any time PMT housing is opened for maintenance n/a