New Call-to-action
The Nova 350 Series Portable Flue Gas Analyzer has been designed for accuracy, reliability, ease of use and ease of service. It uses customer replaceable sensors which respond quickly to the Oxygen (O2) and combustibles present in the flue gas sample. The sensor life expectancy is between 2 and 3 years.

In operation, a built in sample pump draws in the flue gas sample through the stainless steel probe, 12 ft. (4 m) sample hose, condensate removal filter, secondary filter, flowmeter, then on to the oxygen and combustibles sensors. The detected O2 and combustibles are displayed on LCD digital meters which have a switchable backlight for use in dark areas. A built in air makeup system ensures that the combustibles detector will always have sufficient O2 for proper operation regardless of sample O2 content.

A rechargeable battery provides enough power for about 6 hours of continuous operation and the analyzer can be used while it is being recharged. A red LED tells when to recharge and a green LED verifies that it is receiving recharging power. The recharger is included.

The Nova 350T indicates stack temperature for doing fuel efficiency calculations. The temperature sensor is built into the sampling probe. Efficiency charts for each fuel are provided.
Unit of Measure

Method of Detection

N/A Catalytic oxidation detector for combustibles. Expected life is 2-3 years for each Customer replaceable electrochemical O2 sensor

Ranges Available

N/A 0-1800°F or 0-1000°C stack temperature (Model 350T) 0-25.0% O2 0-5.0% or 0-10.0% combustibles


N/A 0.1% O2 and combustibles

Accuracy & Repeatability

N/A ±1% full scale, based on 20.9% O2; ± 2% of full scale combustibles


N/A <2% full scale per 8 hours of continuous operation

Response Time (T-90)

N/A 5-8 seconds for O2; 20-30 seconds for combustibles

Ambient Temperature Range

N/A 0 to 40.5 ºC32 to 105 ºF


N/A ±1% full scale, based on 20.9% O2; ± 2% of full scale combustibles

Size & Weight

N/A K Style: 14" L x 10 1/2" W x 6" H @ 12 lbs (36 x 27 x 15 cm @ 5.5 kg) WP Style: 10" L x 7 1/2" H x 8" D @ 8 lbs (25 x 19 x 20 cm @ 3.6 kg)


N/A AC/DC Operation, 115 VAC 60 Hz for recharging (Other voltages available.)

Output Options

N/A 4-20 mA or 0-1 VDC

Unique Applications

N/A The 350 Series should not be used for detecting these gases in ambient atmospheres for personnel safety purposes. 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.

Primary Gas to be Measured

N/A Oxygen (O2)

Industry Type

N/A Flue Gas or Emissions


    Analysis of oxygen (O2) and combustibles. For checking the 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 and maintain
  • Fast warm-up and response
  • Long-life catalytic combustibles sensor
  • Long-life electrochemical O2 sensor
  • Digital readout meter with backlight
  • Rechargeable battery operation
  • Built in sample pump, filter and flowmeter
  • Active condensate removal
  • Stainless steel probe with sample hose
  • Use on any fuel
  • Pays for itself in months through fuel savings


  • Recorder outputs of 0-1 V or 4-20 mA (can be isolated)
  • Stack temperature readout (Model 350T)
  • High temperature probes
  • Sample pre-cooler
  • Suitcase (K) style cabinet available
  • AC power only operation
  • Detachable/portable data logger


  • Air for O2 span and combustibles zero.
  • Analyzed mixture of carbon monoxide (CO), methane (CH4), or hydrogen (H2) in nitrogen (N2) for combustibles span and O2 zero.

View Our
Product Catalog
Have a question?
Contact Us
Ready to get started?
Request Quote