New Call-to-action
The Nova 376 Series Portable Analyzers provide a detailed analysis of flue gas composition. They have been designed for accuracy, reliability, and ease of use and service. The sensors respond quickly to the gases of interest present in the flue gas sample. Under normal conditions of use, the O2, CO and NOx sensors each have a life expectancy of between 3 and 4 years and are customer-replaceable. The CO2 sensor should not need to be replaced.

In operation, a built in sample pump draws in the flue gas sample through the S.S. probe, 12 ft. (4 m) sample hose, condensate removal filter, secondary filter and flowmeter, and then on to the four sensors. The detected O2, CO2, CO, and NOx are displayed on digital meters which have a switchable backlight for use in dark areas. The sensors do not require special SO2 scrubbing chemicals as do some types of analyzers.

The Nova 376T version also indicates stack temperature for doing fuel efficiency calculations. The temperature sensor is built into the sampling probe. Efficiency charts for each fuel are provided. A rechargeable 'gel cell' battery provides enough power for about 16 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.
Unit of Measure


Method of Detection

N/A Customer replaceable electrochemical O2, CO and NO sensors Solid state infrared detector for CO2

Ranges Available

N/A 0-1800°F (0-1000°C) stack temperature 0-20.0% CO2 0-200 to 0-2000 PPM NOx (as NO) ranges available 0-2000 PPM and 0-4.00% CO - Switch selectable 0-25.0% O2

Accuracy & Repeatability

N/A Within ±0.1% O2 and CO2; ±10 PPM CO and NO


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

Response Time (T-90)

N/A 10-15 seconds for O2; 20-30 seconds for CO, NO, and CO2

Ambient Temperature Range

N/A 0 to 40 ºC32 to 105 ºF


N/A ±1.0% of full scale for each gas measured

Size & Weight

N/A 18" L x 7" H x 12" D @ 15 lbs (45.7 x 30.5 x 17.8 cm @ 6.8 kg)


N/A AC/DC Operation, 115 VAC, 60 Hz for recharging

Output Options

N/A 0-1 VDC 4-20 mA

Hazardous Area Rating Options

N/A General Purpose, Non-Hazardous



    Analysis of oxygen (O2), carbon monoxide (CO), carbon dioxide (CO2) and oxides of nitrogen (NOx as NO). 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
  • CO2 actually measured by infra-red detector, not calculated
  • Dual CO range : 0-2000 ppm & 0-4.00%
  • Rapid reading recovery after CO or NO 'overdose'
  • Digital readout meters with backlight
  • Rechargeable battery operation
  • Built in sample pump, filter and flow meter
  • Active condensate removal
  • Weatherproof (WP) cabinet with clear Lexan cover
  • Stainless steel probe with sample hose
  • Use on any fuel



  • Outputs of 0-1 V or 4-20 mA (can be isolated)
  • Stack temperature readout (376T)
  • Special sampling probes
  • Suitcase (K) style cabinet available
  • AC power only operation
  • Gas alarms with LED
  • Detachable/portable data logger



  • Air for O2 span and CO/CO2 zero
  • Analyzed gas mixtures of CO2, CO, and NOx in nitrogen for span

Unique Applications


    The 376 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.

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