Home Gas Analyzer Indonesia Model 309A Portable CO2-O2 Analyzer (NOVA)
Model 309A Portable CO2-O2 Analyzer (NOVA)
The Model 309A series utilizes a single cell infrared detector for CO2 and a customer replaceable electrochemical sensor for O2. Neither sensor is affected by water vapor or other gas vapors in the sample gas. The O2 sensor typically lasts 3-4 years. In operation, a built-in sample pump draws in the gas sample through the sample hose, filter/condensate trap, secondary filter and flow meter then on to the CO2 and O2 detectors. The gas readings are then displayed on LCD digital meters which have switchable backlights 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.

For checking carbon dioxide (CO2) and oxygen (O2) in controlled atmosphere (C/A) 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 for CO2
• Long-life electrochemical sensor for O2
• 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 0-1V or 4-20mA
• Sample pre-cooler for hot samples
• Stainless steel probe with sample hose
• Condensate removal for wet applications
• Suitcase (K) or bench top (BT) style cabinets available
• AC power only operation
• CO2 and O2 alarms with LED
• Detachable/portable datalogger

• Air for CO2 zero and O2 span.
• Analyzed calibration gas for CO2 span and O2 zero.


Method of Detection: NDIR infrared detector for CO2; electrochemical O2 sensor
Ranges Available: 0-3000 PPM, 0-5000 PPM, 0-1%, 0-10%, 0-20%, 0-50% and 0-100% CO2
0-25% O2 (other ranges available)
Resolution: 0.1 % on versions or 10 PPM on PPM versions
Accuracy and Repeatability: Within ± 2% full scale
Drift: 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: 40° to 120°F (4° to 49°C)
Linearity: ± 1.0% of full scale
Size and Weight: WP style - approx. 11½" L x 8" W x 7¼" H @ 8 lbs (29 x 20 x 18 cm @ 3.6 kg)
K style - approx. 14" L x 10½" W x 6" H @ 12 lbs (36 x 27 x 15 cm @ 5.5 kg)
BT style - approx. 8" L x 9" H x 10" D @ 12 lbs (20 x 23 x 25 cm @ 5.5 kg)
Power: AC/DC operation. 115VAC 60 Hz for recharging (other voltages available)
Output Options: 4-20 mA or 0-1 VDC
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