The Model T201 combines a specially configured chemiluminescence analyzer with an external thermal converter 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 remarkable 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.​

•Independent ranges for NH3, NO, NO2, NOx
•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
•External converter not shown above​​​​

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
Lag Time: 40 seconds
Rise/Fall Time: < 300 seconds to 90%
Linearity: 1% of full scale (RMS) above 50 ppb
Precision: 0.5% of reading above 50 ppb
Sample Flow Rate: 1000 cm3/min ±10%
Power Requirements: 100V-120V, 220V-240V, 50/60 Hz
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, 8 x analog inputs (0-10V, 12-bit), 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 165 mm)
Weight: Analyzer: 43 lbs (20 kg), Converter: 24 lbs (11 kg), External pump: 16 lbs (7 kg) ​