Home Gas Analyzer Indonesia Model 321 Portable O2 Process Analyzer (NOVA)
Model 321 Portable O2 Process Analyzer (NOVA)

A rechargeable ‘gel cell’ battery provides enough power for the pump and electronics for about 20 hours of continuous operation. The analyzer may still be operated while it is being charged. A red LED indicates when to recharge the analyzer and a green LED indicates that it is receiving recharging power. The battery recharger is included with the analyzer. The detected O2 is displayed on an LCD digital meter that has a switchable backlight for use in dark areas. The analyzer is supplied with a 12ft. sample hose and either a sample pump or pressure regulator.

Analysis of oxygen (O2) concentration in industrial process gas or purging and blanketing gases.


• Rugged design that is easy to operate and maintain
• Fast warm-up and response
• Long life 'fuel cell' oxygen sensor (3-4 year life)
• Digital readout meter with backlight
• Rechargeable battery operation
• Built-in sample pump or pressure regulator, filter and flow meter
• Weatherproof (WP) cabinet with clear Lexan cover
• Stainless steel probe with sample hose


• Outputs of 0-1V or 4-20 mA
• Sample pre-cooler for hot or wet sample gases
• Suitcase (K) style cabinet available
• AC only power operation
• Detachable/portable data logger


• On air for span
• On nitrogen for zero


Method of Detection: Long life electrochemical oxygen sensor
Ranges Available: 0-5.0%, 0-10.0%, 0-25.0% and 0-50.0% O2
Resolution: 0.1% O2
Accuracy and Repeatability: ±1% of full scale (±2% for over 30% O2)
Drift: < 2% of full scale for 8 hours of operation
Response Time (T-90): 8-10 seconds for 90% of step change
Ambient Temperature Range: 32° to 105°F (0-40°C)
Linearity: ±1.0% of full scale
Size and Weight: WP style - approx. 10" L x 7½" H x 6½" D @ 8 lbs (25.5 x 19 x 16.5 cm @ 3.6 kg)
K style - approx. 14" L x 6" H x 10½" D @ 8 lbs (35.5 x 15.2 x 26.6 cm @ 3.6 kg)
Power: 115VAC 60Hz for recharging (other voltages available)
Output Options: 0-1V or 4-20mA (optional)
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