​Model T201
​with NumaView™ Software

Chemiluminescence NH3 Analyzer​



  • Independent ranges for NH3, NO, NO2, NOxTAPI_Thermal Converter_501NH3.png
  • ​External converter shown on right
  • 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
  • Comprehensive internal data logging with programmable averaging periods
  • Ability to log virtually any operating parameter
  • Two-year warranty


083730201B - MANUAL, USER, NVS, T201.pdfT201 with NumaView™ Software Manual14635 KB
22-002A REST API Tutorial For Numaview Instruments - NOX.pdfREST API Tutorial for NumaView Instruments584 KB
ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB
External Pump Pack Manual - 07900 - E.pdfExternal Pump Pack Manual369 KB
NVS Remote Manual - 08492.pdfNumaView™ Software Remote User Guide867 KB
SAL000051D - T201.pdfT201 Specification1017 KB
SAL000051E-CN T201.pdfT201规格 (Chinese Specification)1018 KB
SAL000076K - Environmental Instruments Overview.pdfEnvironmental Instruments Overview610 KB
T SERIES_6PG.BROCHURE_2018_web.pdfT Series with NumaView™ Software Brochure9567 KB


Ranges Min: 0-50 ppb Full scale
Max: 0-2,000 ppb Full scale (selectable, independent NH3,
NO, NO2, NOx ranges supported)
Measurement Units ppb, ppm, μg/m3, mg/m3 (selectable)
Zero Noise < 0.5 ppb (RMS)
Span Noise 1% of reading
Lower Detectable Limit < ​1 ppb
Zero Drift < 0.5 ppb/24 hours (NO, NOx)
Span Drift 1% of full scale/24 hours
 Response Time
< 340 seconds to 90%
Linearity 1% of full scale
Precision 0.5% of reading above 50 ppb
Sample Flow Rate 1000 cm3/min ±10%
Power Requirements 100V-120V, 220V-240V, 50/60 Hz, Typical power 125W;
Converter typical power 480W
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 15 - 40ºC
Dimensions (HxWxD) Analyzer: 7” x 17” x 23.5” (178 x 432 x 597 mm)
Converter: 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: 43 lbs (20 kg)
Converter: 22 lbs (10 kg)
External pump: 22 lbs (10 kg) ​


The Model T201 combines a specially configured chemiluminescence analyzer with an external thermal converter (see "Features" tab for external converter photo) to give stable and repeatable NH3 measurements at very low levels.  In addition, the T201 provides simultaneous values for NO, NO2, and NOx concentrations.  The T201 is ideal for trace ammonia monitoring applications in ambient air as well as in clean rooms and make-up air units.  Optional zero and span valves allow automatic, unattended calibration checks.

​The Model T201 achieves its remarka​ble stability by means of an AutoZero valve which measures and corrects for zero noise.  Multiple self-checks are performed continuously to insure maximum up-time while an innovative sample path, plumbed with specially conditioned materials, preserves the NH3 sample and reduces interferents to a minimum. 

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 T201 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.​