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

In operation, a built in sample pump draws in the gas sample through the sample hose, condensate removal filter, secondary filter and flow meter then on to the infrared CO2 detector. The detected CO2 is displayed on an LCD digital meter which has a switchable backlight for use in dark areas.

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.
Unit of Measure


Method of Detection

N/A Microprocessor based infrared detector for CO2

Ranges Available

N/A 0-3000, 0-5000 or 0-10,000 PPM; 0-2%, 0-5%, 0-10%, 0-20%, 0-50% or 0-100% CO2. Other ranges available.


N/A 0.1% CO2 on % versions; 10 PPM CO2 on PPM versions

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 4 to 49 ºC40 to 120 ºF


N/A Better than 1.0% of full scale

Size & Weight

N/A 14" L x 6" H x 10 1/2" D @ 12 lbs (35.5 x 15.2 x 26.6 cm @ 5.5 kg)


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

Output Options

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


N/A High or low CO2 alarms with LED (optional)

Hazardous Area Rating Options

N/A General Purpose, Non-Hazardous



    For checking carbon dioxide (CO2) content in mushroom growing rooms, incubators, natural gas, controlled atmosphere storage rooms, welding gas mixtures, and other process applications.



  • Rugged design that is easy to operate
  • Fast warm-up and response
  • Solid state infrared detector
  • Digital readout meter with backlight
  • Modular layout that is easy to maintain
  • Rechargeable battery operation
  • Built in sample pump, filter, and flowmeter
  • Weatherproof (WP) cabinet with clear Lexan cover



  • Recorder outputs of 0-1 V or 4-20 mA
  • Sample pre-cooler for hot samples
  • Condensate removal for wet applications
  • Suitcase (K) style cabinet available
  • AC power only operation
  • CO2 alarms with LED
  • Data logger



  • 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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