Model T200U
with NumaView™ Software
Trace-level Chemiluminescence NO/NO2/NO​X Analyzer


  • Ranges: 0-5 ppb to 0-2,000 ppb, user selectable
  • Independent ranges and auto ranging
  • 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
  • Available with NumaViewsoftware upon request
  • Two-year warranty


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

TEST functionsReview and evaluateWeeklyNo
Particulate filterChange particle filterMonthly or as necessaryNo
Zero/span checkEvaluate offset and slopeWeeklyNo
Zero/span calibrationZero and span calibrationEvery 3 monthsYes
External zero air scrubber optionExchange chemicalEvery 3 monthsNo
External dryer optionReplace chemicalWhen indicator color changesNo
Ozone cleanserChange chemicalAnnuallyYes
Reaction cell window (“optical filter”  Figure 11‑6 in manual)CleanAnnually or as necessaryYes
DFU filtersChange particle filterAnnuallyNo
Pneumatic sub-systemCheck for leaks in gas flow pathsAnnually or after repairs involving pneumaticsYes if a leak is repaired
Reaction cell O-rings & sintered filtersReplaceAnnuallyYes 
PMT Sensor Hardware CalibrationLow-level hardware calibrationOn PMT/ preamp changes or if slope is outside of 1.0±0.3Yes
PumpRebuild headwhen RCEL pressure exceeds 10 in-Hg-A (at sea level)Yes
Inline Exhaust ScrubberReplaceAnnuallyNo
NO2 converterReplace converterEvery 3 years or if conversion efficiency drops below 96%Yes 
Desiccant  bagsReplaceAny time PMT housing is opened for maintenancen/a


ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB
External Pump Pack Manual - 07900.pdfExternal Pump Pack Manual351 KB
NVS Remote Manual - 08492.pdfNumaView™ Software Remote User Guide867 KB
SAL000049G - T200U.pdfT200U Specification733 KB
SAL000049G-CN T200U.pdfT200U规格 (Chinese Specification)1439 KB
SAL000076H - Environmental Instruments Overview.pdfEnvironmental Instruments Overview614 KB
T SERIES_6PG.BROCHURE_2018_web.pdfT Series with NumaView™ Software Brochure9567 KB
T200 & T200U NVS Manual - 083730200.pdfT200/T200U with NumaView™ Software Manual16802 KB


Ranges Min: 0 - 5 ppb full scale
Max: 0 - 2,000 ppb full scale (selectable, independent NO, NO2, NOx 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 1,000 cc/min ±10%
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
20 - 30ºC (with US EPA Equivalency)
Dimensions (HxWxD) 7” x 17” x 23.5” (178 x 432 x 597 mm)
Weight Analyzer: 40 lbs (18 kg)
External pump: 22 lbs (10 kg)

Specifications are subject to change without notice.
All specifications are based on constant conditions.​
US EPA: RFNA-1194-099 ​​​


The Model T200U Trace-level NO/NO2/NOx analyzer has been developed specifically to address the challenges of low level monitoring as required, for example, in the US NCore network.  It uses the proven chemiluminescence principle and is designed to allow ultra-sensitive measurements with a lower detectable limit of 50 ppt while still meeting the requirements for use as a US EPA compliance analyzer.

The Model T200U 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.

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 comes NumaView™ Software. NumaView™ Remote PC Software allows for a remote connection with virtual interface and data downloading capability to analyzers operating NumaView™ Software.