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All Categories > By Primary Gas to be Measured > Carbon Dioxide Analyzers (CO2) > Continuous Carbon Dioxide Analyzers for Hazardous Locations (CO2) > Continuous Process Carbon Dioxide Analyzer by Infrared Detector - 420 Series > Item # Model 420RMN7  


Item # Model 420RMN7, Model 420RMN7 Carbon Dioxide Analyzer, ex-proof sensor housing with rack mount control cabinet (two separate enclosures)

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.


Cabinets: Wall Mounted NEMA7 UL/CSA Explosion-proof sensor cabinet with 19" rack mount control cabinet (two separate cabinets)





Specifications  · Applications  · Features  · Options  · Calibration  · Unique Applications

Specifications

Method of Detection
Single cell NDIR with no moving parts

Ranges Available
420 - 0-1, 0-5, 0-10, 0-20, 0-30, 0-50, 0-100% CO2
420L - 0-5,000 PPM CO2

Resolution
1 or 10ppm on most ppm ranges; 0.1% on most % ranges

Accuracy & Repeatability
±1-3% of full scale, depending on measurement range and application

Drift
Usually 2% of full scale per month or less, depending on range and application

Response Time (T-90)
Usually 20-30 seconds to 90% step change, depending on range and application

Ambient Temperature Range
40 to 104°F (4 to 40°C)

Linearity
Usually ±1.5% of full scale, depending on gas measured

Size & Weight
EX-PROOF: 61H x 33W x 31H cm (24"H x 13"W x 12"D)
RACK MOUNT: 22H x 48W x 47D cm (8.7"H x 19"W x 16"D)

Power
115 VAC, 60 Hz
220 VAC, 50 Hz

Output Options
4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, USB serial outputs

Alarms
High and/or Low alarm contacts available, relay contacts SPDT 5A @ 220 VAC rating
Low flow alarm

Analyzer Type
CO2 Gas Analyzer

Hazardous Area Rating Options
Control Cabinet - General Purpose, Non-Hazardous
Detector Cabinet - NEMA7 Class 1 Division 1 Groups BCD


Applications
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.


Features
  • 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


Options
  • Hi/Low gas and low flow alarms available
  • Isolated analog, RS485 outputs available


Calibration
  • Easily zero checked on ambient air or nitrogen (N2)
  • Span using a known CO2 in nitrogen calibration gas.


Unique Applications
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. In many cases, we are able to build an analyzer specific to your needs.



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