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​Model T803

with NumaView™ Software

CO2/O2 Analyzer




  • O2 Range: 0-1% to 0-100%, CO2 Range 0-20% user selectable
  • Dual 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
  • Comprehensive internal data logging with programmable averaging periods
  • Ability to log virtually any operating parameter
  • Two-year warranty


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

Particulate FilterReplaceWeekly or as neededNo10.3.1
Verify Test FunctionsRecord and analyzeWeekly or after any Maintenance or RepairNo11.1.2
Pump DiaphragmReplaceAnnuallyYes10.3.2
Perform Flow CheckCheck FlowAnnuallyNo10.3.4
Perform Leak CheckVerify Leak TightAnnually or after any Maintenance or RepairNo10.3.3
Pneumatic linesExamine and cleanAs neededYes if cleaned 
ChassisWipe downAs neededOnly if cover removed 
 ​  ​


07276C - Manual, T803.pdfT803 Manual4696 KB
SAL000067C - T803.pdfT803 Specifications1102 KB
T SERIES_6PG.BROCHURE_2018_web.pdfT Series with NumaView Brochure9567 KB


Ranges O2
Min: 0 - 1% full scale 
Max: 0 - 100% full scale (selectable)
Zero Noise < 0.02% (RMS)
Span Noise < 0.5% of reading (RMS)
Lower Detectable Limit 0.04% ppb
Zero Drift < ±0.02% /24 hours; < ±0.05% /7 days
Span Drift < ±0.1% /7 days
Accuracy < ±(1.5% of range +2% of reading)
​Temperature Coefficient

​< ±0.01% per degree C

Rise/Fall Time < 60 seconds to 95%
Linearity  ​< ±0.1%
Precision 0.5% of reading above 50 ppb
 Flow Rate
 120ml ± 20ml/min
​​      Humidity Range
​0-95 % RH
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
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
Operating Temperature Range 5 - 40ºC
Dimensions (HxWxD) 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.​

 28 lbs (12.7 kg)


The Model T803 CO2/O2 analyzer combines the non-dispersive infrared measurement principle within the model T801 and the proven paramagnetic measurement principle within the T802 in to a single analyzer.  Both technologies give accurate and reliable results combined with product longevity, providing the best price performance value on the market.

The T803 CO2/O2 analyzer is based on widely accepted sensor techniques producing an excellent, rugged product designed for extractive CEM or RATA applications.

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 T803 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.