Featured Products

Nova Gas Analyzers


The Model 309 Series Portable Flue Gas Analyzer has been designed for accuracy, reliability and ease of use and service. The 309 uses a long life electrochemical O2 sensor and a solid state infra red CO2 detector, both of which respond quickly to O2 and 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 O2 sensor and CO2 detector. The detected gases are displayed on separate LCD digital meters which have a switchable backlight for use in dark areas.

The 309 can optionally indicate stack temperatrue (309T) for doing fuel efficiency calculations. The temperature sensor is built into the sampleing probe. Efficiency charts for each fuel are provided.

A rechargeable battery provides enough power for about 8 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.


  • Not affected by wind!
  • Will NOT false alarm from residues or stray gasses.
  • Detects ANY gas, even Vacuum!
  • No tips to clean or sensors to replace.
  • It’s patented, and one of a kind - Nothing works like AccuTrak!
  • Also great for compressed air leaks
  • Finds pneumatic leaks quickly


Method of Detection

Electrochemical O2 sensor
Infrared detector for CO2

Ranges Available

0-5000 ppm; 0-1%; 0-10%; 0-20%; 0-50%; 0-100% CO2
0-25% O2


0.1% O2 and CO2

Accuracy & Repeatability

Within ±2% full scale


Within 1% full scale per 8 hours of continuous operation

Response Time (T-90)

O2 less than 10 seconds; CO2 less than 30-40 seconds to T-90

Ambient Temperature Range

4 to 49 C
40 to 120 F


±1.0% of full scale

Size & Weight

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 - 11 1/2" L x 8" W x 7 1/4" H @ 8 lbs (29 x 20 x 18 cm @ 3.6 kg)


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

Output Options

0-1 VDC
4-20 mA

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.

Primary Gas to be Measured

Carbon Dioxide (CO2)
Oxygen (O2)

Industry Type

Flue Gas or Emissions

MDA 400 Bearing Lifeguard