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Item # Model 420N4, Model 420N4 Carbon Dioxide Analyzer, Wall Mounted NEMA4 (IP65) Enclosure Rating
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The Nova 420 Series CO2 analyzers utilize a simple and reliable microprocessor-based non-dispersive infrared detector specific to CO2. The detector pulses an infrared beam of light through the sample tube, without the need for a mechanical chopper. In operation, the internal sample pump draws the sample gas through a filter, flow meter, and then on to the infrared detector. The detector output is digitally linearized and then displayed as percent CO2 on the digital meter. The output is also available as an analog or digital signal.
Standard Cabinet: NEMA 4 Weather-proof steel cabinet with window.
Optional: 19" rack mount cabinet also available in some applications.
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Method of Detection
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Single cell NDIR with no moving parts
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Ranges Available
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420 - 0-1, 0-5, 0-10, 0-20, 0-30, 0-50, 0-100% CO2
420L - 0-5,000 PPM CO2
420L-LP - 0-500, 1000, 2000, 5000, 10000 PPM (may be available, check with NOVA)
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Resolution
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0.1% CO2 on % versions, 1 PPM CO2 on PPM versions
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Accuracy & Repeatability
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±1-3% of full scale, depending on measurement range and application
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Drift
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Usually 2% of full scale per month or less, depending on range and application
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Response Time (T-90)
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Usually 20-30 seconds to 90% step change, depending on range and application
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Ambient Temperature Range
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40 to 104°F (4 to 40°C). Optional: up to 130°F (55°C) with cabinet cooler
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Linearity
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Usually ±1.5% of full scale, depending on range and application
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Size & Weight
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NEMA 4: 51H x 41W x 26D cm (20"H x 16"W x 10"D)
RACK MOUNT: 22H x 48W x 47D cm (8.7"H x 19"W x 16"D)
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Power
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115 VAC, 60 Hz
220 VAC, 50 Hz
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Output Options
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4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, USB serial
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Alarms
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High and/or Low alarm contacts available, relay contacts SPDT 5A @ 220 VAC rating
Low flow alarm
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Analyzer Type
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CO2 Gas Analyzer
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Hazardous Area Rating Options
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General Purpose, Non-Hazardous
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Light-duty analyzers for applications or environments that are less intensive. For continuous analysis of carbon dioxide (CO2) in process gas streams using an infrared detector. Both percent and PPM analysis available.
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- Detector is temperature-controlled or compensated for improved analytical stability
- High ranges available (up to 100%)
- Low ranges available (5,000 ppm)
- Touch-screen display for gas readings
- Built-in sample pump or pressure regulator
- Non-isolated 4-20mA analog recorder output
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- Hi/Low gas and low flow alarms available
- Serial output & data-logger package available
- Light-duty pre-filter & condensate removal
- Up to 6 other gases measured (depending on application)
- Cabinet cooling available
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- On ambient air or bottled O2 gas for Span
- On bottled N2 for Zero
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The 420 Series analyzers are designed for detection of CO2 in non-corrosive gas streams. All Nova analyzers are built using proven technologies and techniques. If this product does not suit your application, please contact Nova at 1-800-295-3771. In many cases, we are able to build an analyzer specific to your needs.
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