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The Nova 480 Series represent Nova's best value in continuous low range CO process analysis. This analyzer utilizes a long-life electrochemical 'fuel cell' sensor for the detection of CO in process gases. The sensor produces a small millivoltage output which is directly proportional to the oxygen detected. The output is then amplified and displayed on a digital readout meter and recorder output. The 480 can be supplied with sampling pump or pressure regulator to suit most applications.

Cabinet: Wall Mounted NEMA7 UL/CSA Explosion-proof with Non-intrusive Magnetic Calibration, Class 1 Div 1 Group BCD
Unit of Measure


Method of Detection

N/A Customer replaceable electrochemical 'fuel cell' CO sensor. Expected life 1 to 3 years depending on typical measurement concentrations.

Ranges Available

N/A Any range from 0-100 PPM to 0-10000 PPM C0



Accuracy & Repeatability

N/A ±1% of full scale


N/A Less than 1% of full scale per month

Response Time (T-90)

N/A 6-8 seconds to 90% step change

Ambient Temperature Range

N/A 32 to 122°F (0 to 50°C), Lower temperatures (-5°F, -20°C) with Cold Weather Package


N/A ±1% of full scale

Size & Weight

N/A Dimensions will vary depending on enclosure style and options required


N/A 115 VAC, 60 Hz 220 VAC, 50 Hz

Output Options

N/A 4-20 mA into 500 ohms non-isolated standard Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs


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

Analyzer Type

N/A CO Analyzer

Hazardous Area Rating Options

N/A Class 1, Div 1, Grp A-D Hazardous Area Rating



    For continuous analysis of up to 0-10,000 PPM carbon monoxide (CO) in process gas streams using an electrochemical detector.



  • Best value continuous low-range CO analyzer
  • Long life (1-3 years) electrochemical CO sensor
  • Bright digital readout
  • Fast response (T90 - 6 to 8 seconds)
  • Microprocessor control for push button calibration
  • Easy-to-maintain modular layout
  • Built in sample pump or pressure regulator
  • Sensor mounted in temperature controlled heated box to improve accuracy
  • 4-20 mA outputs



  • Hi/Low gas, low flow, and diagnostic alarms available
  • Isolated analog, RS232, RS485, MODBUS, and Ethernet outputs available
  • Sample conditioning systems available for removal of moisture, acidic gas, and dust
  • Cabinet purge system available for use in hazardous areas
  • One-step 'cal-now' button with touch screen LCD display
  • Full automatic calibration with touch screen LCD display
  • Cold weather package for operation to -5°F (-20°C)
  • Cabinet coolers can be fitted to most models
  • High temperature filters and probes



  • Nitrogen for zero.
  • Analyzed CO calibration gas for span.

Unique Applications


    Continuous analysis of CO by electrochemical cell requires that a small amount of O2 be present in the sample, or that it be metered into the sample. 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.

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