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The Model 302 Series Portable Flue Gas Analyzers have been designed for accuracy, reliability, and ease of use and service. The 302 uses a solid state infrared detector which responds quickly to CO2 present in the flue gas sample.

In operation, a built in sample pump draws in the flue gas sample through the S.S. probe, 12 ft sample hose, condensate removal filter, secondary filter and flow meter then on to the CO2 detector. The detected CO2 is displayed on a digital meter.

The 302 can optionally indicate net stack temperature (302T) for doing fuel efficiency calculations. The temperature sensor is built into the sampling probe. Efficiency charts for each fuel are provided.

A rechargeable battery provides enough power for about 8 hours of operation and the analyzer can be used while it is being recharged. The recharger is included for choice of 115V / 60Hz or 220V / 50Hz electrical power.

(The Model 302 is also now sold under the NOVA 5300FG Series.)
Unit of Measure


Method of Detection

N/A Microprocessor based infrared detector for CO2

Ranges Available

N/A 0-20% CO2


N/A 0.1% CO2

Accuracy & Repeatability

N/A Within ±2% full scale


N/A Within 1% full scale per 8 hours of continuous operation

Response Time (T-90)

N/A 30 - 40 seconds

Ambient Temperature Range

N/A 0 to 40 ºC32 to 105 ºF


N/A ±1.0% of full scale

Size & Weight

N/A approx. 26 x 18 x 13 cm @ 3.4 kg (10" x 7" x 5" @ 7.5lbs)


N/A 115 VAC / 60 Hz for recharging (220VAC / 50Hz also available)

Output Options

N/A 4-20mA

Hazardous Area Rating Options

N/A General Purpose, Non-Hazardous



      Analysis of carbon dioxide (CO2). For checking combustion efficiency, and burner & control performance of furnaces, heaters and boilers. May be used in commercial, industrial and residential settings.



  • Rugged design that is easy to operate
  • Fast warm-up and response
  • Solid state infrared detector
  • Digital readout meter
  • Modular layout that is easy to maintain
  • Rechargeable battery operation
  • Built in sample pump, filter and flowmeter
  • Active condensate removal
  • Suitcase (K) style cabinet, weatherproof when closed
  • Stainless steel probe with sample hose



  • Recorder output - 4-20mA
  • Stack temperature readout (302T)
  • Special sampling probes
  • Sample pre-cooler
  • Built-in printer



  • Air for zero (except low range models which have a CO2 scrubber for zeroing).
  • Analyzed CO2 cal gas for span.

Unique Applications


    All Nova analyzers are built using proven technologies and techniques. If this product does not suit your application, please contact Nova. In many cases, we are able to build an analyzer specific to your needs.

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